Preliminary 2006 SOHO LASCO Coronal Mass Ejection List (Revised 31-December-2006 -- GAS) N.B. This is a working version of a catalogue of activity and probable coronal mass ejections detected in white light observations of the LASCO coronagraphs. This list is maintained at the SOHO Experimenters' Operations Facility, and it is based on an examination of only quick-look data, which represents a subset of the final LASCO dataset. Questions about this list should be directed to: planner@lasco6.nascom.nasa.gov . Note some changes to lists from earlier years: 1) Smaller events 'now' taken into account when possible due to the decline of the solar activity cycle. DATE UT Location Comment 01-Jan-2006: ************ E - Gusty outflow all along the day. W-SW - Pseudo-continuous outflow all along the day. 03:43 SE - Jet-like front. 21:54 W - Brightening just appearing develops as a bright loop front towards WNW. Ragged loop front behind toward W. An elongated loop front seems to develop on WSW by 23:06 UT. GOES reported a C1.5 X-ray flare on NOAA AR 10838 (N16W90) between 21:41 - 23:00 UT with peak emission at 22:16 UT. ---------------------------------------------------------------------------------- 02-Jan-2006: ************ 03:06 WNW - Elongated and ragged loop front in the trailing material of the event reported to start at 21:54 UT on previous day. It fades throughout C3. 08:30 WNW - Another elongated and ragged loop front, followed by a similar one (though smaller) at ~ 11:30 UT. They also fade throughout C3. 12:30 NNE - Very narrow and diffuse loop-like front that quickly fades. 17:30 WNW - Another elongated and ragged loop front. It fades close to the inner edge of C3. 17:30 SE - Narrow, diffuse, and very faint loop-like front that fades close to the inner edge of C3. 23:30 W - Elongated and narrow loop front. It fades throughout C2. ---------------------------------------------------------------------------------- 03-Jan-2006: ************ 05:30 W - Narrow loop front that quickly fades. 11:30 WSW - Faint and ragged blob-like front to N of streamer, followed at 14:30 UT by a relatively bright structure (slightly curved toward S) that quickly fades. 20:33 W - Small and faint blob-like front becomes discernible. 21:30 E - Diffuse brightening precedes the slow development of a system of faint loops. ---------------------------------------------------------------------------------- 04-Jan-2006: ************ E - Pseudo-continuous outflow all along the day. 05:54 W - Small brightening that quickly fades. 12:30 NNW - Jet-like front. 22:06 WSW - Diffuse structure slightly curved toward S, just N of streamer (apparently northern leg of a very faint loop front superposed with the streamer). Barely visible in C3. ---------------------------------------------------------------------------------- 05-Jan-2006: ************ 03:30 WSW - Diffuse front to N of streamer. 09:54 WNW - Bright ragged loop front. Some very faint and diffuse arcade- like extensions above the W Limb (two events superoposed?). GOES recorded an impulsive C4.4 X-ray flare on NOAA AR 10843 (N14W59) between 09:17 - 09:26 UT with peak emission at 09:23 UT during a relatively long duration B8.6 X-ray flare occurred on AR 10841 (N13W77). 09:30 E - Elongated and diffuse loop-like front preceding a ragged loop- like structure. They both fade throughout C3. 16:06 WNW - Faint and diffuse loop-like front that fades throughout C2. ---------------------------------------------------------------------------------- 06-Jan-2006: ************ 07:31 WNW - Very faint and diffuse loop-like front that fades throughout C2. 22:30 ESE - Very faint and elongated loop front. It fades throughout C2. ---------------------------------------------------------------------------------- 07-Jan-2006: ************ SW - Slow development of a system of faint loops along the streamer since late on previous day. It continues all along the day. Difficult to give an exact time of first appearance. Signatures of the event barely visible in C3. 09:54 ESE - Faint and elongated fan-like front that fades close to the inner edge of the C3 FOV. 21:54 SW - Diffuse and asymmetric expanding loop front. First clearly seen in C3 at 00:18 UT on next day. ---------------------------------------------------------------------------------- 08-Jan-2006: ************ 02:30 NNE - Very faint and diffuse jet-like front. 15:54 E - Extremely faint and diffuse front that quickly fades. 20:30 E - Initially bright ragged loop front that fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 09-Jan-2006: ************ 02:30 E - Diffuse front slightly developing toward ENE, partly superposed in the LOS with streamer, where the slow development of faint structures can be also seen by the time. The diffuse front fades very close to the inner edge of C3. ---------------------------------------------------------------------------------- 10-Jan-2006: ************ 04:54 ENE - Very faint and not-well-defined front that quickly fade. 12:30 SE - Diffuse and elongated loop-like front. It fades close to the inner edge of the C3 FOV. 20:30 E - Extremely faint and not-well-defined front developing slightly toward ENE that quickly fade. ---------------------------------------------------------------------------------- 11-Jan-2006: ************ 00:54 W - Faint and diffuse elongated front that fades throughout C2. 01:54 E - Diffuse loop-like front preceding the development of an expanding (though elongated) ragged loop front (first clearly discernible at around 02:54 UT) with apparently twisted trailing part. ---------------------------------------------------------------------------------- 12-Jan-2006: ************ 10:54 NE - Faint and diffuse jet-like front that quickly fades. 15:30 SSE - Diffuse brightening starts to be seen in C2. A bright and Partial expanding loop front follows at 15:54 UT on the S Pole. Some Halo trailing material, in particular some relatively narrow loop fronts on SSW starting at around 17:54 UT. By the end of the day, the event seems to cover completely the C2 occulting disk (the LE on S well past the outer edge of the C2 FOV, while very weak signal barely above the occulting disk on N). The event is first seen in C3 at 16:42 UT just appearing above the SSE limb. The bright loop front is well seen on the S by 17:18 UT. By 23:18 UT the event spans in the C3 FOV about 215 deg (from PA ~ 065 - 280). Afterward, the legs become too faint to determine whether the C3 occulting disk gets completely covered. The mean plane-of-sky speed of the LE of the event at PA 170 was ~ 475 km/sec, showing an slight acceleration. GOES recorded no significant X-ray activity during the day (below the A level). Likewise, EIT 195 images do not show any significant event on the disk by the time prior to the LASCO C2 event. Therefore, the event has been determined as at least a Partial Halo Event, most likely backsided, based on the lack of X-ray (GOES) and EUV (EIT 195) activity. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060112 ---------------------------------------------------------------------------------- 13-Jan-2006: ************ S - Some narrow ragged fronts (plus gusty outflow) during the day, rotating toward SE as they appear. In particular, fronts at 02:54, 08:30, and 14:30 UT. 00:54 W - Bright loop front with some very faint and diffuse extensions to N, and a twisted --like circularly structured-- interior. The event becomes visible in C3 at 02:42 UT, appearing above the W Limb. Its angular extent at ~ 07:42 UT is about 70 deg (from PA ~ 240 - 310). EIT 195 shows the lift-off of a filament located at around S03W16 by ~ 23:48 UT on previous day). 17:54 ESE - Elongated and narrow loop-like front. It fades throughout C3. 23:54 NW - Very faint loop front. Barely discernible in C3. ---------------------------------------------------------------------------------- 14-Jan-2006: ************ SSE - Gusty outflow and some small ragged fronts (rotating toward SE) continue until around midday. W - Gusty outflow all along the day. 00:06 ENE - Elongated and relatively bright loop front. ---------------------------------------------------------------------------------- 15-Jan-2006: ************ 05:30 WSW - Elongated and very narrow front developing toward W. It fades throughout C2. 05:30 ESE - Couple of very faint blob-like fronts start to be discernible. They both fade throughout C3. 16:30 ENE - Elongated fan-like front. **** LASCO Data Gap between 18:54 - 22:35 UT. **** ---------------------------------------------------------------------------------- 16-Jan-2006: ************ 11:36 E - Very faint elongated and slightly expanding loop front. Extremely faint in C3, fading throughout its FOV. Otherwise, mostly quiet. ---------------------------------------------------------------------------------- 17-Jan-2006: ************ 03:30 W - Diffuse brightening develops as an elongated and ragged loop front. It fades throughout C3. 05:54 SE - Loop front along the streamer that fades throughout C3. Reconection-type event by around 08:30 UT in the trailing part. ---------------------------------------------------------------------------------- 18-Jan-2006: ************ 12:30 ENE - Very slow development of a system of faint loops. Difficult to give an exact time of first appearance. 12:59 SE - Couple of small fronts along the streamer. They quickly fade. ---------------------------------------------------------------------------------- 19-Jan-2006: ************ 00:30 WSW - Big and bright loop front (brighter to N) with inner core. 01:31 ESE - Elongated fan-like front that fades close to the inner edge of C3. 09:30 NE - Diffuse brightening develops as an elongated loop front. Pseudo- continuous development of loop fronts afterward, rotating toward the N Pole and up to NNW by the beginning of next day. 09:30 SE - Brightening along streamer immediately followed by a bright loop front, which starts to be seen at around 10:06 UT. Very bright and big core follows slightly shifted to S (prominence material). The event starts to be seen in C3 at 11:18 UT developing as a ragged loop front with a bright inner core. Some faint extensions can be seen to N, extending up to almost NE. Gusty outflow follows well into next day. EIT 195 images show the lift-off of a very large prominence between 09:36 - 11:36 UT, which appears to originate well behind the limb. ---------------------------------------------------------------------------------- 20-Jan-2006: ************ SE - Strong gusty outflow continues jointly with some ragged fronts, all along the day. Also by the beginning of the day the slow development of a system of faint loops starts to be distinguished superposed in the LOS with the gusty outflow. 09:30 W - Faint jet-like front that quickly fades. 16:54 SE - While the outermost front of the slow system of faint loops gets to the outer edge of the C2 FOV, a very faint and diffuse expanding front starts to be guessed, spanning up to past the S Pole by midnight (difficult to give an exact time of first appearance). By around 02:30 UT on next day, one leg of the front reaches the W Limb while the other seems to remain anchored on SE (very asymmetric shape). ---------------------------------------------------------------------------------- 21-Jan-2006: ************ SE - Gusty outflow continues. Some small (blob-like) ragged fronts at: 08:06, 10:56, 18:54, and 23:06 UT. 18:30 W - Extremely faint loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 22-Jan-2006: ************ 04:30 SE - Small (blob-like) ragged front. 13:54 WSW - Faint ragged front starts to be discernible. It fades throughout C3. 23:06 WSW Couple of small and extremely faint (blob-like) fronts start to be discernible. ---------------------------------------------------------------------------------- 23-Jan-2006: ************ 04:30 SW - Very faint and elongated loop-like front. Barely visible in C3 and only very close to its inner edge. 10:54 WNW - Ragged and diffuse loop front that fades throughout C2. 20:30 SW - Very narrow (jet-like) loop front that quickly fades. 23:06 SE - Very narrow (jet-like) fan-like front that quickly fades. 23:06 SSE - Another very narrow fan-like front that quickly fades. ---------------------------------------------------------------------------------- 24-Jan-2006: ************ 00:54 WSW - Very narrow (jet-like) loop front that fades very close to the inner edge of C3. 02:30 N - Jet-like front. 12:06 NE - Extremely faint ragged front starts to be discernible. Difficult to give an exact time of first appearance. It can be better seen in C3 (where it is first seen at around 14:42 UT just appearing above the NE limb). It fades throughout C3. 20:30 W - Very faint and diffuse front that quickly fades. ---------------------------------------------------------------------------------- 25-Jan-2006: ************ 01:31 N - Very narrow fan-like front (jet-like) developing slightly toward NNW. 14:47 N - Very narrow loop fornt (jet-like) that quickly fades. 18:06 SE - Very narrow and elongated fan-like front that quickly fades. 21:30 E - Slow development of a ragged loop front with structured (twisted?) interior. Difficult to give an exact time of first appearance. See entry at 04:54 UT on next day. 21:54 W - Very narrow and elongated loop front that fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 26-Jan-2006: ************ 03:54 W - Slightly asymmetric and diffuse loop-like front that fades throughout C2. 04:54 E - Small front developing behind the slow development of the ragged loop front reported to start at 21:30 UT on previous day. Result: nice gradual-type CME. Some gusty outflow afterward all along the day and into next day. 06:30 NW - Diffuse jet-like front. 09:06 W - Asymmetric and elongated fan-like front. It fades throughout C3. 16:30 W - Extremely faint and elongated loop front that fades very close to the inner edge of C3. ---------------------------------------------------------------------------------- 27-Jan-2006: ************ 06:06 SE - Very faint and diffuse elongated loop front developing toward ESE. It fades throughout C2. 21:30 W - Very faint and diffuse elongated loop front. It fades throughout C2. 22:06 WSW - Very faint brightening along the streamer that quickly fades. ---------------------------------------------------------------------------------- 28-Jan-2006: ************ 02:30 WNW - Very narrow and elongated loop front. It fades throughout C3. 11:30 WSW - Diffuse front along the streamer that fades close to the inner edge of C3. 13:31 WNW - Extremely faint -slow- loop front (difficult to give an exact time of first appearance). First seen in C3 by 22:18 UT. 20:30 N - Elongated jet-like front. 23:06 WSW - Another diffuse front along the streamer. It quickly fades. ---------------------------------------------------------------------------------- 29-Jan-2006: ************ 03:30 NW - Faint and diffuse loop front. Couple of blob-like fronts seems to be discernible to S by 05:30 UT. 03:54 WSW - Diffuse front along the streamer. Some small and faint ragged fronts along the day. 16:54 ENE - Slow development of a system of faint loops. Difficult to give an exact time of first appearance. ---------------------------------------------------------------------------------- 30-Jan-2006: ************ 00:54 E - Elongated and structured front developing slightly toward ESE. Ragged front follows by around 08:30 UT. 06:30 ENE - Inverted V-shaped structure starts to be discerned developing behind the system of faint loops reported to start at 16:54 UT on previous day (gradual event). Twisted trailing material. 07:31 WSW - Brightening along the streamer that quickly fades. 15:06 ENE - Elongated and ragged loop front developing behind the event reported to start at 06:30 UT. It moves faster, so it reaches the V-shaped structure close to the inner edge of the C3 FOV. 17:30 WSW - Another brightening along the streamer that quickly fades. ---------------------------------------------------------------------------------- 31-Jan-2006: ************ 10:06 WSW - Brightening just appearing develops as a ragged loop front. It fades throughout C3. 16:30 WSW - Another brightening just appearing develops as a ragged loop front. It also fades throughout C3. 18:55 WNW - Extremely faint expanding loop front, the northern leg reaching the N Pole by the beginning of next day. Barely discernible in C3. 20:58 SW - Faint and diffuse front. It fades throughout C2. 22:30 SW - Another faint and diffuse front. It fades throughout C2. ================================================================================== 01-Feb-2006: ************ WSW - The slow development of a system of faint loops can be discerned since late on previous day partly superposed in the LOS with the faint and diffuse fronts that develop on SW. 01:31 SW - Faint and diffuse front. 12:30 SW - Diffuse front that fades close to the inner edge of C3. 16:06 ENE - Kind of reconection event (blob -very faint- coming out and corresponding blob falling down) at around PA 65 (~2.85 solar radii). ---------------------------------------------------------------------------------- 02-Feb-2006: ************ 03:30 ENE - Another reconection-type event at PA 68 (~ 4.23 solar radii). 06:30 WNW - Very faint and diffuse loop front. Barely visible in C3, and only very close to the inner edge of C3. By ~ 10:06 UT, an even fainter expanding loop front follows on NW. 09:30 ESE - Very narrow and diffuse fan-like front that quickly fades. 11:30 SW - Initially bright loop front superposed in the LOS with the slow development of a system of faint loops. 18:54 ESE - Another very narrow and diffuse fan-like front that quickly fades. 21:54 ESE - Very narrow loop front (jet-like) a little bit to S of previous event. It fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 03-Feb-2006: ************ 08:54 E - Diffuse brightening precedes the development of a bright loop front (first clearly seen at 09:30 UT) with structured (twisted?) interior (gradual event). It develops toward ENE. EIT 195 images show the eruption of a prominence between 00:00 - 09:36 UT, which was seen rising since ~ 15:24 UT on previous day. 10:30 SW - Slow development of a system of faint expanding loop fronts. The southern leg shifts toward SE as it develops (it crosses the S Pole by around 20:22 UT). 12:54 E - Relatively bright front partly superposed in the LOS with event reported to start at 08:54 UT. ---------------------------------------------------------------------------------- 04-Feb-2006: ************ 03:54 E - Bright blob-like front followed at 09:30 UT by another (very ragged and fainter) one. They both fade throughout C3. ---------------------------------------------------------------------------------- 05-Feb-2006: ************ 00:06 ESE - Slow development of a system of faint and wide expanding loop fronts. Difficult to give an exact time of first appearance. 20:06 E - Elongated and faint loop front developing in the trailing material of previous event and moving apparently faster. **** LASCO Data Gap between 22:30 - 24:00 UT. **** ---------------------------------------------------------------------------------- 06-Feb-2006: ************ **** LASCO Data Gap between 00:00 - 05:30 UT. **** 11:06 E - Faint and small blob-like front that fades throughout C3. Couple more at ~ 18:55 UT. 11:06 SSW - Small and very faint blob-like front. It fades throughout C2. ---------------------------------------------------------------------------------- 07-Feb-2006: ************ 03:54 E - Faint and small blob-like front starts to be discernible developing slightly toward ESE. 07:31 SE - Very narrow and elongated loop-like front. It fades very close to the inner edge of C3. 09:30 SSE - Jet-like front that quickly fades. 12:54 SE - Extremely faint elongated loop front developing toward ESE. It fades very close to the inner edge of C3. ---------------------------------------------------------------------------------- 08-Feb-2006: ************ 10:30 SE - Faint and elongated loop front (jet-like) that quickly fades. 14:30 SE - Faint fan-like front that quickly fades. 20:30 ESE - Faint and elongated ragged loop-like front. It fades throughout C3. ---------------------------------------------------------------------------------- 09-Feb-2006: ************ 04:06 W - Extremely faint and diffuse front that quickly fades. 22:30 E - Jet-like front. ---------------------------------------------------------------------------------- 10-Feb-2006: ************ **** LASCO Data Gap between 00:00 - 10:33 UT. **** 21:54 W - Small blob-like fronts start to be discerned. 23:30 SE - Bright rim just appearing above the SE Limb. It develops as a Asymmetric bright, wide, and expanding loop front that practically covers HALO the whole southern hemisphere in the C2 FOV early on 02/11. Very faint and diffuse extensions can be seen in the northern hemisphere, already fully covering the C2 occulting disk by 01:31 UT on 02/11 (the LE on S almost reached the end of the C2 FOV by that time). The event is first seen in C3 on 2006/02/11 at 01:42 UT all above the SE limb. The bulk of the CME develops mainly toward SSE. Faint extensions develops toward E and W, and fully surround the C3 occulting disk by 04:18 UT (though by this time the diffuse extensions are barely above the N Pole). The mean plane-of-sky speed of the LE of the event at PA ~ 162 was ~ 465 km/sec, showing practically no acceleration. GOES recorded no significant X-ray activity during 02/10 and 02/11 (below the A level save an A3.6 X-ray flare on S19E81 between 22:53 - 23:08 UT with peak emission at 23:03 UT). Likewise EIT 195 images do not show any significant event on the disk by the time prior to the LASCO C2 event. Note that a large and bright coronal loop system became visible on the east limb early on 02/11. The region may have been the source of the halo event. In summary, the event has been determined as an asymmetric Full Halo Event, backsided. And note that the bulk of the CME develops mainly toward SSE as projected on the plane-of-sky. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060210 ---------------------------------------------------------------------------------- 11-Feb-2006: ************ SE - Ragged fronts all along the day (and much gusty outflow) in the aftermath of Halo Event reported to start on previous day. ---------------------------------------------------------------------------------- 12-Feb-2006: ************ SE - Gusty outflow continues along the day, subsiding late in the afternoon. 14:06 ENE - Very narrow loop-like front (jet-like) that fades throughout C2. 14:54 NE - Diffuse jet-like front developing apparently faster than previous event. It fades very close to the inner edge of C3. ---------------------------------------------------------------------------------- 13-Feb-2006: ************ ESE - Some faint and small ragged fronts along the streamer during the day. 02:30 E - Faint, diffuse, and very elongated front. It fades throughout C3. 20:54 ENE - Narrow, elongated, and diffuse feature that shifts toward NE as it develops. ---------------------------------------------------------------------------------- 14-Feb-2006: ************ 00:30 E - Very diffuse fan-like front. 16:30 W - Ragged and diffuse front preceding an elongated and twisted structure. The development of this twisted structure continues into next day. It fades throughout C3. 23:30 ESE - Very faint front along the streamer that quickly fades. ---------------------------------------------------------------------------------- 15-Feb-2006: ************ W - Some gusty outflow along the day. Also couple of small blob-like fronts at ~06:30 UT. 19:31 WNW - Narrow and very faint fan-like front that fades throughout C2. ---------------------------------------------------------------------------------- 16-Feb-2006: ************ 03:06 SW - Extremely faint (in fact, barely visible) asymmetric front. 10:30 NNE - Very narrow and diffuse fan-like front that quickly fades. ---------------------------------------------------------------------------------- 17-Feb-2006: ************ 05:54 ENE - Bright loop front followed by cavity and structured inner core (prominence material). Some infalling material in the trailing material late in the day. ---------------------------------------------------------------------------------- 18-Feb-2006: ************ E - Some small ragged fronts and gusty outflow during the day in the trail of the event reported to start at 05:54 UT on previous day. 01:31 NW - Elongated and diffuse jet-like front that quickly fades. 08:06 NW - Diffuse and elongated front. It fades throughout C2. 12:30 NNE - Very narrow loop front (jet-like) that quickly fades. ---------------------------------------------------------------------------------- 19-Feb-2006: ************ 00:30 WSW - Diffuse loop front that fades throughout C2. 09:54 N - Narrow and diffuse loop front (jet-like) that fades throughout C2. 14:54 N - Very narrow fan-like front. It fades throughout C2. 18:54 N - Narrow, diffuse, and very elongated loop-like front. It fades throughout C2. 22:54 N - Jet-like front. ---------------------------------------------------------------------------------- 20-Feb-2006: ************ 01:54 ESE - Ragged loop front. It fades throughout C3. 17:06 E - Ragged loop front followed by a not-well-defined front at 20:06 UT. The latter quickly fades. ---------------------------------------------------------------------------------- 21-Feb-2006: ************ 05:30 W - Faint and elongated loop front that fades throughout C2. 06:06 ESE - Not-well-defined front that quickly fades. 17:06 SW - Very faint and ragged loop front. It fades throughout C3. 19:54 NNW - Faint jet-like front that quickly fades. ---------------------------------------------------------------------------------- 22-Feb-2006: KEYHOLE (26 m) ************ 05:30 ESE - Blob-like front starts to be discerned behind a V-shaped feature (which can already be seen since ~ 03:54 UT). 13:31 WSW - Very elongated ragged loop front. It fades throughout C3. There is another elongated loop front a little bit to S also by 13:31 UT (it that quickly fades in C2). 19:55 E - Initially bright loop front. It fades throughout C3. 21:06 W - Very small front that quickly fades. 22:30 NE - Faint and diffuse jet-like front. ---------------------------------------------------------------------------------- 23-Feb-2006: KEYHOLE (26 m) ************ 07:31 S - Jet-like front. 21:06 W - Faint and diffuse jet-like front. ---------------------------------------------------------------------------------- 24-Feb-2006: KEYHOLE (26 m) ************ 01:36 E - Slow development of a system of very faint loop fronts. Difficult to give an exact time of first appearance. 14:30 ENE - Reconnection event: small blob-like front coming out with corresponding infalling material. ---------------------------------------------------------------------------------- 25-Feb-2006: KEYHOLE (26 m) ************ 05:30 ENE - Blob-like front starts to be discerned. 11:30 E - A faint structured feature starts to be discerned developing very slowly. It starts to be discerned in C3 by the end of the day. It fades then throughout C3. 17:06 WNW - Very narrow and elongated loop-like front. It fades throughout C3. ---------------------------------------------------------------------------------- 26-Feb-2006: KEYHOLE (26 m) ************ 02:30 W - Elongated and initially bright loop front. It fades throughout C3 (close to the inner edge). 02:30 NW - Very faint loop front that fades throughout C2. 12:30 W - Elongated front preceding the development of a structured (apparently twisted) feature. The event fades close to the inner edge of C3. 19:54 SSW - Elongated jet-like front. ---------------------------------------------------------------------------------- 27-Feb-2006: KEYHOLE (26 m) ************ 00:54 ESE - Elongated and diffuse front that fades throughout C2. 07:31 ENE - Reconnection event: blob-like front coming out with corresponding infalling material. 09:54 NE - Diffuse jet-like front. 10:30 N - Jet-like front developing slightly toward NNE. ---------------------------------------------------------------------------------- 28-Feb-2006: KEYHOLE (26 m & 34 m) ************ **** EIT CCD Bakeout bewtween 2006/02/28 03:00 UT - 2006/03/18. **** **** TRACE performs detector annealing: 2006/02/27 - 2006/03/03. **** **** Therefore, there will be no full disk mosaics during this **** **** period to compensate for the lack of EIT images during the **** **** CCD bakeout. **** **** LASCO will be running a version of the "Brueckner plumes study" of **** **** Mar 21 1997 between 2006/02/28 03:45 UT - 2006/03/13 (only southern **** **** hemisphere -occulting pylon in the north-). The sequence will be **** **** C2 orange/clear filters, 100 sec exp, 5 min cadence. There will **** **** remain FFFres C2 and C3 at 1 hr cadence for the web and daily orange/ **** **** blue fielding images and orange filter pB sets (due to the poor **** **** cadence - 1hr - some small events maybe missed. **** 14:05 WSW - Bright and elongated loop front. 14:05 S - Faint and very narrow loop front that fades very close to the inner edge of C3. 18:05 SE - Diffuse and very elongated fan-like front (slightly curved). 20:05 ESE - Another diffuse and very elongated curved feature. ================================================================================== 01-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ 02:05 NW - Diffuse and elongated faint loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 02-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ 02:05 E - Slow development of a loop system. Very faint and diffuse loop- like extensions to S, apparently extending up to the S Pole (they start to be seen as early as 01:05 UT). A bright structured feature (apparently twisted) can be seen developing after the data gap that starts at 04:05 UT. 03:05 WSW - Slow development of a system of faint loops. It continues after the data gap. **** Non-recoverable LASCO Data Gap between 04:05 - 10:05 UT. **** ---------------------------------------------------------------------------------- 03-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ 09:05 WSW - Narrow and relatively bright front. 16:05 WSW - Faint and diffuse feature starts to be discerned developing (like being pushed) toward S. It becomes visible in C3 by 20:35 UT on SW. By 22:05 UT (C2 time), a very faint expanding loop front follows on SW. The southern leg of the diffuse feature crosses the S Pole by that time (the northern leg is not discernible). The diffuse feature continues developing such that the southern leg crosses the SE limb by midday (next day). ---------------------------------------------------------------------------------- 04-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ 11:05 NNW - Diffuse jet-like front. ---------------------------------------------------------------------------------- 05-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ 04:05 SE - Faint and ragged elongated loop front. Gusty outflow on ESE. ---------------------------------------------------------------------------------- 06-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ 12:05 NE - Diffuse loop front that fades throughout C2. 12:05 W - Not-well-defined front. **** LASCO closed doors at ~ 19:30 UT in preparation **** **** for Maneuvers on 2006/03/07. **** **** - Last C2 image before closing doors: 18:59 UT **** **** - Last C3 image before closing doors: 19:03 UT **** ---------------------------------------------------------------------------------- 07-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Doors closed (S/C Maneuvers: MM and S/K). **** ---------------------------------------------------------------------------------- 08-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Doors closed. **** ---------------------------------------------------------------------------------- 09-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Doors closed. **** ---------------------------------------------------------------------------------- 10-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ **** LASCO recovery @ 02:30 UT. **** **** First Full Field C2 image after recovery: 02:42 UT **** **** First Full Field C3 image after recovery: 02:47 UT **** 02:42 NW - Slow development of a system of loops already under development. Elongated loop front follows by ~ 16:05 UT on WNW. Gusty outflow all across the western limb well into next day. 10:05 E - Elongated and narrow fan-like front. 17:05 E - Diffuse front slightly developing toward ESE. It fades throughout C2. ---------------------------------------------------------------------------------- 11-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ 07:05 NW - Diffuse front develops as a diffuse and ragged loop front. 14:05 WSW - Bright loop front. GOES recorded a B3.4 X-ray flare on NOAA AR 10856 (S10W90) between 13:22 - 14:51 UT with peak emission at 14:00 UT. ---------------------------------------------------------------------------------- 12-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 Brueckner Plumes Study ************ WSW - Gusty outflow and small ragged fronts along the day. 02:05 NNE - Diffuse jet-like front toward NE. ---------------------------------------------------------------------------------- 13-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** End of C2 Brueckner Plumes Study @ ~ 06:00 UT. **** **** Non-recoverable LASCO Data Gap between 10:24 - 15:24 UT. **** **** LASCO closed doors @ 15:25 UT ahead of S/C Roll. **** **** Last C2 image before closing doors for S/C Roll: 15:05 UT **** **** Last C3 image before closing doors for S/C Roll: 15:18 UT **** No significant activity in limited LASCO Data. ---------------------------------------------------------------------------------- 14-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** First C2 image after opening doors: 04:05 UT. **** **** First C3 image after opening doors: 04:09 UT. **** **** Non-recoverable LASCO Data Gap between 04:36 - 15:12 UT. **** **** Non-recoverable LASCO Data Gap between 17:36 - 24:00 UT. **** No significant activity in limited LASCO Data. ---------------------------------------------------------------------------------- 15-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** Non-recoverable LASCO Data Gap between 00:00 - 02:24 UT. **** **** Non-recoverable LASCO Data Gap between 09:00 - 24:00 UT. **** No significant activity in limited LASCO Data. ---------------------------------------------------------------------------------- 16-Mar-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** Non-recoverable LASCO Data Gap between 02:24 - 07:48 UT. **** **** Non-recoverable LASCO Data Gap between 10:24 - 17:00 UT. **** 17:00 W - Slow development of a system of faint loops already under development after data gap. ---------------------------------------------------------------------------------- 17-Mar-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 07:36 WNW - Very faint and diffuse front that fades throughout C2. 08:48 ESE - Diffuse brightening along streamer, first seen in C3 at 10:18 UT. Trailing material during the rest of the day. 20:01 ESE - Faint and diffuse front. It fades throughout C3. **** Special C2 Program betwen 03/17 20:00 UT - 03/18 19:00 UT: **** **** Optical Flows in C2 --> C2 FF orange/clear 50 sec exposure, **** **** pixel summed @ 4 min cadence; plus at the top of each hour **** **** i) a fffres C2 and ii) a fffres C3 image. **** 23:01 SW - Diffuse jet-like front. ---------------------------------------------------------------------------------- 18-Mar-2006: KEYHOLE (26 m) / End of EIT CCD Bakeout ************ 06:01 NNW - Faint and diffuse loop front. It fades throughout C3. It is followed by another one at 12:04 UT on NW. **** EIT resumed operation on 2005/03/18 @ ~ 20:15 UT **** **** after CCD bakeout and post-cal sets. 304A CME Watch. **** 23:54 WNW - Elongated loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 19-Mar-2006: KEYHOLE (26 m) ************ 06:30 E - Elongated brightening that fades close to the inner edge of C3. 15:30 WNW - Elongated and slightly curved feature develops as an elongated loop front. It fades throughout C3. Another similar (though fainter) feature develops by 20:06 UT. ---------------------------------------------------------------------------------- 20-Mar-2006: KEYHOLE (26 m) ************ 04:54 ESE - Very narrow and elongated loop-like feature followed by another one at 07:54 UT. They both are very faint in C3 and fade throughout its FOV. 16:54 SW - Faint and diffuse loop front superposed in the LOS with the slow development of a system of very faint loop fronts which is already under development since early in the day. Difficult to give an exact time of first appearance. Another faint and elongated loop front follows at ~ 21:30 UT. Another one developing toward WSW at ~ 23:30 UT. ---------------------------------------------------------------------------------- 21-Mar-2006: END OF KEYHOLE ************ 03:30 NE - Faint expanding loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 22-Mar-2006: ************ 19:32 E - Diffuse brightening develops as a bright loop front (first clearly seen at 21:50 UT - there is a gap after 19:32 UT until 21:50 UT) with inner core and twisted trailing material. ---------------------------------------------------------------------------------- 23-Mar-2006: ************ 07:27 E - Bright X-shaped feature in the trailing material of the event reported to start at 19:32 UT on previous day. Some small ragged fronts afterward on ESE. 07:27 S - Elongated and diffuse jet-like front. ---------------------------------------------------------------------------------- 24-Mar-2006: ************ E - Faint and small ragged fronts embedded in gusty outflow all across the E limb during the day. 15:05 SSE - Faint and diffuse jet-like front. ---------------------------------------------------------------------------------- 25-Mar-2006: ************ 01:27 E - Couple of small ragged fronts that fade throughout C3. ---------------------------------------------------------------------------------- 26-Mar-2006: ************ WSW - Slow development of a system of faint loops since late on previous day (difficult to give an exact time of first appearance). It fades throughout C2 (in the afternoon). 12:26 E - Initially bright and narrow loop front. Faint extensions to N. It fades throughout C3. 23:26 E - Bright and ragged loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 27-Mar-2006: ************ 02:50 E - Ragged front in the trailing material of the event reported to start at 23:26 UT on previous day. Faint extensions to N. A faint and elongated loop front start to develop by 05:06 UT on ESE. 07:27 E - Slow development of a system of loops develops as a typical gradual CME event (associated to a prominence eruption). Twisted trailing material. Gusty outflow afterward, well into next day. 20:06 NW - Diffuse brightening develops as a bright and expanding loop front with a 'circular' inner structure plus twisted trailing material. ---------------------------------------------------------------------------------- 28-Mar-2006: ************ ESE - Much gusty outflow still under way during the whole day after event reported to start at 07:27 UT on previous day. NW - Trailing material of event reported to start at 20:06 UT on previous day. Some faint loop fronts can be discerned during the day. ---------------------------------------------------------------------------------- 29-Mar-2006: ************ E - Some gusty outflow through afternoon. ---------------------------------------------------------------------------------- 30-Mar-2006: ************ 01:50 NNE - Very faint jet-like front. 13:27 ESE - Very faint and elongated loop-like feature that fades throughout C2. ---------------------------------------------------------------------------------- 31-Mar-2006: ************ 00:26 W - Diffuse and elongated (not-well defined) front followed by a ragged loop front. The event fades throughout C3. ================================================================================== 01-Apr-2006: ************ 20:30 W - Diffuse brightening precedes the slow development of a loop front followed by a twisted (rather 'circular') core (typical gradual CME event). Loop front first seen in C3 on next day at 06:18 UT. 22:30 NE - Extremely faint and diffuse front that quickly fades preceding the development of an asymmetric loop front (see entry at 03:30 UT on next day). ---------------------------------------------------------------------------------- 02-Apr-2006: ************ 03:30 NE - Faint and diffuse asymmetric loop front followed by an apparently different feature (much fainter and diffuse) that extends up to past the N Pole during its early development in C2. By 06:06 UT the signal above the N Pole in C2 is no longer discernible. C3 shows a loop front developing toward NE, first clearly seen at 05:18 UT followed by an expanding and very faint front at 07:42 UT that appears above the NNE Limb and quickly fades. 18:54 W - Small and bright front in the trailing material of the event reported to start at 22:30 UT on previous day. ---------------------------------------------------------------------------------- 03-Apr-2006: ************ 00:30 E - Elongated and diffuse fan-like front. 08:30 E - Elongated and very ragged loop-like feature a little bit to S of previous event. 11:30 ENE - Very slow development of a system of faint loop fronts. Some pseudo-continuous outflow superposed in the LOS. 12:06 E - Another elongated and very ragged loop-like feature at roughly the same PA of the event reported to start at 08:30 UT. 16:30 WSW - Very faint and diffuse front followed by a not-well-defined ragged feature that fades throughout C2. 21:30 SSW - Very faint and diffuse jet-like front that quickly fades. ---------------------------------------------------------------------------------- 04-Apr-2006: ************ 03:30 W - Ragged front. It fades throughout C3. 07:31 SSE - Diffuse front develops as an expanding system of multiple loop fronts. Multiple B-class X-ray flares on NOAA AR 10867 (located at around the central meridian South 15) prior to the event. 11:06 N - Jet-like front. 13:31 W - Bright ragged front that fades throughout C3. Very faint (expanding) extensions to N (almost up to the N Pole). The extensions are barely discernible in C3. Some gusty outflow into next day. ---------------------------------------------------------------------------------- 05-Apr-2006: ************ W - Some gusty outflow during the day. 15:54 W - Slow development of a faint and apparently twisted structure. 23:54 E - Diffuse and very narrow loop front (jet-like) that develops toward ESE. It fades throughout C2. ---------------------------------------------------------------------------------- 06-Apr-2006: ************ W - Some gusty outflow continues. 00:54 NE - Faint loop front that fades throughout C2. 13:31 E - Diffuse and ragged loop front. It fades throughout C3, close to the inner edge. 14:30 ENE - Bright and very thin and elongated fan-like front. It fades throughout C3. ---------------------------------------------------------------------------------- 07-Apr-2006: ************ 06:54 S - Diffuse jet-like front. 11:06 WNW - Elongated and ragged loop front. It fades throughout C2. 12:30 E - Faint and elongated diffuse front that fades throughout C2. 17:30 S - Faint and diffuse jet-like front. 19:31 NE - Jet-like front. ---------------------------------------------------------------------------------- 08-Apr-2006: ************ 05:30 E - Initially bright loop front. It fades very close to the inner edge of C3. 06:06 W - Bright ragged loop front. Twisted feature develops superposed in the LOS with the trailing material, developing more slowly. 11:54 ENE - Diffuse jet-like front. 12:30 NE - Diffuse and very faint jet-like front. 22:30 S - Jet-like front that develops slightly toward SSE. 23:54 E - Diffuse and ragged loop front. It fades throughout C2. ---------------------------------------------------------------------------------- 09-Apr-2006: ************ 03:30 WSW - Faint, diffuse and ragged loop front preceding a bright and very ragged loop front (first seen at 04:30 UT), a little bit to S. Some trailing material and gusty outflow along the day. 14:54 E - Very faint and diffuse loop front that quickly fades. 22:30 W - Bright and ragged front, first seen in C3 above the W Limb on next day at 00:18 UT. Diffuse extensions to N and S. Early on next day the slow development of a system of faint loops can be discerned on NW. Difficult to establish its association, if any, to the bright loop front (see also entry at 06:06 UT on next day). It starts to be seen in C3 on next day at ~ 07:42 UT. ---------------------------------------------------------------------------------- 10-Apr-2006: ************ 06:06 SE - LASCO observed a very faint Partial Halo Event. It is difficult Partial to establish the time of first appearance due to its faintness HALO and the so diffuse aspect of the features involved. Briefly, by around 06:06 UT a very diffuse and faint loop front followed by a faint and expanding feature that extend later all above the S Pole up to the W limb starts to be seen on SE. The expanding feature is apparently first seen in C3 above the W Limb at ~ 11:18 UT. It is difficult to track it accurately in C2 because it mixes up with the trail of a previous limb event on W, already under development (see entry at 22:30 UT on previous day). Note also that early on 04/10 the slow development of a system of faint loops can be discerned in C2 on NW (first seen in C3 at 07:42 UT) from which it is difficult to establish its association, if any, to the bright loop front reported to start at 22:30 UT on previous day. The mean plane-of-sky speed of the LE of our event at PA 151 was ~ 200 km/sec (based on C3 data). The event apparently spans in the C3 FOV at 17:42 UT ~ 165 deg, from PA 110 - 275. No frontsided signatures prior to the event on EIT 195 images, nor X-ray events were reported by the time. The event has therefore been determined as a very faint Partial Halo, most probably backsided. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060410 ---------------------------------------------------------------------------------- 11-Apr-2006: ************ W - Some gusty outflow. 09:54 WSW - Diffuse and faint brightening just appearing develops as a not- well-defined front. It fades throughout C2. 11:30 ENE - Very slow development of a system of faint loops, well into next day. Difficult to give an exact time of first appearance. ---------------------------------------------------------------------------------- 12-Apr-2006: ************ ENE - The slow development of the system of very fainrt loops continues. 16:54 SW - Initially bright and diffuse loop front. It fades throughout C2. 19:46 N - Diffuse jet-like front developing toward NNW. 20:37 W - Diffuse loop front followed by some structured material. The event fade throughout in C3. ---------------------------------------------------------------------------------- 13-Apr-2006: ************ 13:32 ENE - Faint and elongated ragged front. Some reconnection events a little bit to N since earlier and along the rest of the day (pair formation). 14:06 WSW - Bright ragged loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 14-Apr-2006: ************ E - Some gusty outflow. Some small ragged fronts starting at midday on ESE, until early in the evening. ---------------------------------------------------------------------------------- 15-Apr-2006: ************ 07:31 W - Very faint and diffuse front developing toward WSW. It fades throughout C2. 16:54 WSW - Elongated and diffuse loop front. It fades thorughout C3. 17:54 ESE - Elongated loop front. It fades throughout C3. 23:09 E - Long and very thin structure (jet-like) that also fades throughout C3. ---------------------------------------------------------------------------------- 16-Apr-2006: ************ 08:17 NE - Extremely faint (apparently expanding) front. First seen in C3 at 11:30 UT above the NE limb. 22:26 NW - Extremely faint fan-like front. 23:26 NNW - Faint jet-like front. ---------------------------------------------------------------------------------- 17-Apr-2006: ************ 19:31 WSW - Bright ragged loop front. It is followed at 23:35 UT by a small and bright front that disolves throughout C2. ---------------------------------------------------------------------------------- 18-Apr-2006: ************ WSW - The slow development of a system of extremely faint loop fronts can be discerned after the event reported to start at 23:35 UT on previous day, all along the day. ---------------------------------------------------------------------------------- 19-Apr-2006: ************ 00:30 S - Very faint and diffuse fan-like front. It quickly fades. 09:30 ENE - Faint front starts to be discernible. It fades throughout C3. **** LASCO Data Gap between 18:00 - 20:40 UT (EIT Shutterless). **** ---------------------------------------------------------------------------------- 20-Apr-2006: ************ 06:54 SW - System of faint loop fronts. It fades throughout C3. 14:54 W - Extremely faint (and apparently) blob-like front starts to be guessed above the W Limb, developing very slowly. Then, by 18:30 UT a faint feature (X-shaped) starts to develop on WSW (first signatures in C3 at 22:18 UT). A kind of very diffuse flow seems to be superposed in the LOS, apparently developing faster. GOES recorded a couple of B-class events (B1.6 and B2.2) on NOAA AR 10871 (S05W90) that peaked at 17:31 and 19:04 UT, respectively. 23:30 NW - Bright and long jet-like front. ---------------------------------------------------------------------------------- 21-Apr-2006: ************ 01:31 W - Reconnection event very close to the limb. The feature coming out is first seen in C3 at 02:42 UT, a little bit to N of the event described in entry at 22:30 UT on previous day. GOES recorded a B4.5 X-ray flare on NOAA AR 10871 (S05W90) between 00:41 - 00:58 UT with peak emission at 00:49 UT. 01:54 ESE - Faint and diffuse loop-like front preceding the development of a system of diffuse and expanding loop fronts. Some extremely faint extension can be since since late on previous day expanding toward the S Pole. The system partly superposes in the LOS with a brighter (though slower and elongated) system on E that develops slightly toward ESE. 03:30 ENE - Ragged blob-like front. 07:31 NW - Very thin fan-like front that fades throughout C2. 16:54 SE - System of faint exapnding loop fronts. It fades throughout C3. 19:31 WNW - Diffuse jet-like front. 22:30 NW - Diffuse and extremely faint front preceding the development of a system of very faint expanding fronts. This faint system fades throughout C3. ---------------------------------------------------------------------------------- 22-Apr-2006: ************ E - Gusty outflow all along the day. 14:30 E - Diffuse and extremely faint front preceding a brighter feature to N (first clearly seen at 15:54 UT) that fades throughout C3. Some very faint and diffuse extensions above the E limb. 18:54 SW - Faint and elongated loop-like front. It fades very close to the inner edge of C3. ---------------------------------------------------------------------------------- 23-Apr-2006: ************ E - Some gusty outflow all along the day. 01:54 NE - Faint fan-like front. 05:30 ENE - Couple of brightenings that quickly fade. 14:30 ENE - Elongated fan-like front. Some faint loop-like fronts follow (both on ENE and ESE) 15:06 SW - Extremely faint expanding (toward S) front. Barely discernible in C3. **** LASCO Data Gap between 20:06 - 24:00 UT (C2 time). **** ---------------------------------------------------------------------------------- 24-Apr-2006: ************ 19:33 NW - Diffuse and very faint front that quickly fades. Otherwise, no significant activity. ---------------------------------------------------------------------------------- 25-Apr-2006: ************ 06:54 ESE - Bright loop front just appearing develops as a big and bright CME (towards E) with structured inner material. GOES reported a long duration X-ray event (C1.3) on NOAA AR 10876 (S15E64) between 06:29 - 08:30 UT with peak emission at 07:26 UT. 15:30 ENE - Couple of extremely faint and diffuse fronts that quickly fade. ---------------------------------------------------------------------------------- 26-Apr-2006: No significant activity. ************ ---------------------------------------------------------------------------------- 27-Apr-2006: ************ 02:54 S - Diffuse and very faint jet-like front developing slightly toward SSE (it quickly fades). **** NOTE: **** GOES recorded an M7.9 X-ray flare on NOAA AR 10875 (S08E26) between **** 15:22 - 15:58 UT with peak emission at 15:52 UT. No visible signatures **** likely associated to the event can be discerned in the LASCO C2 FOV. 19:54 W - Faint ragged loop front developing slowly. A faint circular feature superposes in the LOS. ---------------------------------------------------------------------------------- 28-Apr-2006: ************ 13:31 E - Diffuse and extremely faint front that quickly fades. 17:30 N - Diffuse and very faint jet-like front. 23:54 ENE - Bright loop front with structured interior. Faint extensions to N and S. GOES recorded a C2.3 X-ray flare on NOAA AR 10878 (~N16E90) between 23:23 - 23:52 UT with peak emission at 23:36 UT. ---------------------------------------------------------------------------------- 29-Apr-2006: ************ 08:30 ENE - Ragged loop front. It fades throughout C3. 12:54 W - Diffuse, ragged, and expanding loop front. Very faint in C3. It fades throughout C3. 16:54 ENE - Bright loop front. Faint extensions to N and S. Gusty outflow afterward. GOES recorded another C2.3 S-ray flare on NOAA AR 10878 (~N16E81) between 16:15 - 16:45 UT with peak emission at 16:31 UT. 22:06 ENE - Very faint and diffuse front that quickly fades. ---------------------------------------------------------------------------------- 30-Apr-2006: ************ **** LASCO data gap between 01:31 - 03:54 UT (C2 time). **** 03:54 ENE - Bright and ragged loop front already under development after data gap (LE almost at the end of the C2 FOV). Very faint extensions seem to cover the C2 occulting disk by 06:06 UT. Difficult to say if those extension are really associated to the bright loop front. GOES recorded a C5.3 X-ray flare on NOAA AR 10878 (~N16E74) between 01:33 - 02:07 UT with peak emission at 01:57 UT. EIT 195 images show evidence of a CME on and behind the limb on ENE during the data gap. 10:34 ENE - Extremely faint and diffuse brightening starts to be discernible C2 HALO on ENE, apparently covering the C2 occulting disk by 11:54 UT (elliptical shape, i.e., elongated toward E and W). Barely discernible in C3. GOES recorded a C1.8 X-ray flare on NOAA AR 10876 (S10E08) between 09:13 - 09:37 UT with peak emission at 09:32 UT. EIT 195 images show a brightening between 09:24 and 09:48 UT concentrated in the W part of the AR. Some dimming around FC N and E of AR. In summary, the event has been catalogued as an extremely faint Full Halo event (only visible in C2), frontsided, associated to a C-class X-ray event on NOAA AR 10876. See images and movies of the event (including previous event) at ftp://ares.nrl.navy.mil/pub/lasco/halo/20060430 17:54 SW - Extremely faint and slightly expanding loop front. It fades throughout C3. 22:06 W - Faint and diffuse loop front followed by a narrow front a little bit to S at 00:06 UT (on 05/01). ================================================================================== 01-May-2006: ************ W - Some gusty outflow until past midday. 04:06 WSW - Narrow ragged front. 15:30 W - Extremely faint and diffuse brightening just appearing above the C2 HALO W Limb [1]. It extends up to past the N Pole by 16:30 UT. Also some extensions on S by 18:06 UT. A very ragged loop front follows on SW by ~ 17:06 UT [2]. Finally, a system of faint loop fronts develops on W by 18:30 UT [3], moving out much more slowly than [2]. The complex event appears as a faint full halo in the C2 FOV (though the signal in the eastern hemisphere is barely discernible). Feature [2] is clearly discernible in C3, where it is first seen appearing on SW by 18:18 UT. By 22:18 UT, Feature [3] makes its appearance above the W Limb in the C3 FOV. There is no detectable signatures of the event in the eastern hemisphere. The mean plane-of-sky speed based in both C2 and C3 (only few points at the beginning of the FOV) data is as follows: i) Feature [2] at PA 222: ~ 330 km/sec (showing practically no acceleration), ii) Feature [3] at PA 270: ~ 140 km/sec (showing practically no acceleration). GOES recorded a long duration C1.0 X-ray flare on NOAA AR 10875 (S17W29) between 14:33 - 16:34 UT with peak emission at 15:35 UT. EIT 195 images show the development of a frontsided CME characterized by the formation of a dimming region to S of AR 10875, then E and then N all between around 14:24 - 15:48 UT. Nice post-flare loops afterward. In summary, the event has therefore been determined as a very faint Full Halo Event (only visible in C2), frontsided, associated to a long duration C-class X-ray event on NOAA AR 10875. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060501 ---------------------------------------------------------------------------------- 02-May-2006: ************ 09:30 NE - Faint and diffuse jet-like front that quickly fades. 12:30 W - Ragged front developing slightly toward WNW, brighter to S. ---------------------------------------------------------------------------------- 03-May-2006: ************ 00:30 E - Diffuse and very faint front develops slowly, slightly toward ENE. It fades throughout C3 (very faint). Some gusty outflow along the day, especially on ENE. 23:30 SW - Elongated and apparently twisted feature. Some brightenings already seen since a little bit earlier. EIt 1985 images show a prominence eruption to S of NOAA AR 10875 between around 23:12 - 23:48 UT. ---------------------------------------------------------------------------------- 04-May-2006: ************ 00:54 SSE - Faint jet-like front that quickly fades. 01:31 SW - Small brightening just appearing to S of event reported to start Partial at 23:30 UT, develops as a ragged and expanding loop front [1]. HALO It is followed by a structured core (its inner front first seen in C2 at 02:54 UT) [2]. By 03:30 UT, a system of faint and expanding loop fronts start to be visible above the S Pole [3]. By 06:54 UT this system of loops spans ~ 145 deg (from PA 110 - 255). Feature [1] is first seen in C3 appearing above the SW Limb at 03:18 UT. Feature [2] follows behind at 04:42 UT. Finally, Feature [3] appears above the S Pole at 05:42 UT, partly superposed in the LOS with [2]. The mean plane-of-sky speed of the different features involved is as follows (based on C3 data): . Feature [1] at PA 226: 520 km/sec (no acceleration) . Feature [2] at PA 225: 400 km/sec (no acceleration) . Feature [3] at PA 187: 300 km/sec (no acceleration). The last measurement is not that reliable due to the faintness of its LE (and superposition with Feature [2]). GOES reported no significant X-ray activity by the time prior to the LASCO C2 event, though it recorded a B3.7 X-ray flare on NOAA AR 10876 (S17W41) between 03:28 - 05:00 UT with peak emission at 04:35 UT. EIT 195 images show between ~ 00:24 - 01:36 UT the eruption of the rest of the filament (see entry at 22:30 UT on previous day), between AR 10876 and E05. It is visible at least as far as the skirt of the South Polar Coronal Hole at ~ S60. EIT shows then, between ~ 01:13 - 06:48 UT, the slow evolution of post-CME loops to SE of AR 10876. The event has therefore been catalogued as a Partial Halo Event, frontsided, associated to a filament eruption. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060504 07:54 NW - Faint and elongated front starts to be discernible. 15:06 SW - Diffuse front preceding the development of a bright and elongated ragged loop front. A bright ragged loop front follows at 15:30 UT a little bit to N developing toward WNW. It is followed by the slow development of a system of faint loop fronts on W. EIT 195 images show signatures of a narrow backsided CME between ~ 14:24 - 17:36 UT. 18:30 ESE - Extremely faint and diffuse front that quickly fades. GOES recorded a C1.1 X-ray flare on S10E90 between 17:34 - 18:15 UT with peak emission at 17:45 UT. ---------------------------------------------------------------------------------- 05-May-2006: ************ W - Gusty outflow along the day. Some small ragged fronts. 02:30 W - A small front develops superposed in the LOS with the trail of the slow system of faint loop fronts reported on entry at 15:06 UT on previous day. 13:32 SW - Faint and diffuse loop front preceding the development of a system of faint loop fronts (slightly expanding). It fades throughout C3. 20:54 SW - Elongated fan-like front preceding what it looks like a bright and twisted elongated feature moving toward WSW. ---------------------------------------------------------------------------------- 06-May-2006: ************ 06:06 W - Very faint and diffuse loop front that dissolves throughout C2. Couple of thin and small ragged fronts a little bit to N (before and after). 15:30 SW - Elongated and diffuse front. Another one at ~ 17:30 UT, and another one (much brighter) at around 20:30 UT (with apparently twisted trailing material). ---------------------------------------------------------------------------------- 07-May-2006: ************ 03:54 SW - Elongated ragged front. Gusty outflow. 06:30 WSW - Ragged front that dissolves throughout C2, partly superposed in the LOS with the trail of previous event. 15:30 SE - Very thin and elongated feature, slowly expanding. Some jet-like fronts follow (they end by the morning of 05/08). ---------------------------------------------------------------------------------- 08-May-2006: ************ NW - Slow development of a system of faint loops since late on previous day. 04:30 SW - Ragged front preceding the development of a bright and ragged front (first seen at 05:54 UT). Bright and twisted prominence material follows. 06:30 NW - Elongated and diffuse front partly superposed in the LOS with a faint and twisted feature that followed the slow development of the system of faint loops. It fades throughout C3. **** LASCO Data Gap between 11:30 - 14:54 UT (C2 time). **** 21:30 NW - Small front preceded by a fainter one. It fades throughout C3. ---------------------------------------------------------------------------------- 09-May-2006: ************ 03:30 WNW - Extremely faint and diffuse front barely visible preceding the development of a couple of very small fronts (the first one starts to be discernible at 06:54 UT). 08:30 W - Faint asymmetric loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 10-May-2006: ************ **** LASCO Data Gap betwwen 09:30 - 11:54 UT (C2 time). **** E - Some outflow after midday, well into next day. ---------------------------------------------------------------------------------- 11-May-2006: ************ E - Pseudo-continuous outflow. 16:30 E - Slow development of a faint system of loops. Difficult to give an exact time of first appearance. The feature develops as a gradual twisted structure, well into next day. 17:30 SW - Faint and diffuse loop front that fades throughout C2, followed by a faint loop front to S. A faint ragged front follows then at ~ 23:54 UT. The latter fades throughout C3. ---------------------------------------------------------------------------------- 12-May-2006: ************ E - The development of a twisted structure [1] on E continues (see entry at 16:30 UT on previous day). SW - Couple of faint ragged fronts start to be discernible early on the day. 19:30 E - Faint loop front in the trailing material of [1]. It fades throughout C3. ---------------------------------------------------------------------------------- 13-May-2006: ************ 00:30 E - Couple of faint and diffuse fronts preceding the development of events reported to start at 06:25 and 08:48 UT, both on E. 01:30 WSW - Faint and elongated front developing toward E. 03:16 NE - Jet-like front. 06:25 NE - Diffuse jet-like front. 06:25 E - Diffuse and elongated ragged front developing slightly toward ENE. It fades close to the inner edge of C3. 08:48 E - Diffuse loop front ahead of bright front with apparently twisted trailing material. 19:31 E - Asymmetric front (brighter on ENE) in the trailing material of event reported to start at 08:48 UT. Blob-like front on ENE, just to N of the northern leg. ---------------------------------------------------------------------------------- 14-May-2006: ************ 15:06 E - Very faint and diffuse front that fades throughout C2. 21:30 SE - Relatively bright and wide ragged front, already spanning all the way from ENE up to the S Pole. Extremely faint and diffuse extensions all above the western limb. The N Pole is covered by the faint extensions by ~ 22:30 UT. The event is first seen in C3 all above the SE Limb, but much brighter on E. It quickly fades. The extension on W are barely discernible. No significant X-ray activity recorded by GOES during the day (background x-ray flux below the A2 level). ---------------------------------------------------------------------------------- 15-May-2006: ************ **** LASCO data gap between 06:06 - 12:30 UT (C2 time). **** 13:31 W - Elongated and initially bright ragged loop front developing toward WSW. It fades throughout C3. 17:06 E - Ragged loop front that fades throughout C3. ---------------------------------------------------------------------------------- 16-May-2006: ************ 01:31 W - Thin jet-like front followed at 03:30 UT by another jet-like front much more diffuse. 07:31 NW - Jet-like front. 10:54 WNW - Diffuse jet-like front. 12:30 SE - Very faint ragged front. It fades throughout C3. 13:31 W - Bright and thin fan-like front. 20:06 E - Elongated ragged loop front that fades close to the inner edge of c3. ---------------------------------------------------------------------------------- 17-May-2006: ************ SW - Slow development of a system of faint loop fronts since late on previous day (difficult to give an exact time of first appearance). By 08:54 UT, a brighter feature appears, also gradually developing [1]. EIT 195 images show a filament eruption on SW between ~ 06:36 - 08:36 UT. 03:30 E - Diffuse front that fades throughout C2. Another front follows at ~ 05:30 UT. By ~ 06:54 UT, the slow development of a system of faint loop fronts can be discerned. Pseudo-continuous outflow superposes in the LOS, all along the day. EIT 195 images recorded a filament eruption on SE between 10:00 - 11:48 UT. 08:30 N - Faint and diffuse jet-like front. 14:54 NW - Thin and very elongated fan-like front that fades close to the innner edge of C3. 23:06 SW - A brighter feature can be seen at around the PA of the southern leg of the trailing material of the event reported at the beginning of this report [1]. Afterward, twisted material can be discerned, well into next day. ---------------------------------------------------------------------------------- 18-May-2006: ************ SW - Development of a twisted structure (that started on previous day). Eruption of a large filament recorded in EIT 195 between 05/17 13:13 - 05/18 04:24 UT. 05:30 E - Very diffuse front that apparently fades throughout C2. 10:06 ESE - Another diffuse front that quickly fades. 22:30 E - Diffuse and ragged loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 19-May-2006: ************ SW - Some pseudo-continuous outflow until afternoon. 03:06 NW - Faint and thin fan-like front that fades throughout C2. 15:06 E - Diffuse and ragged front. It fades close to the inner edge of C3. 23:06 SW - Bright and elongated loop front. ---------------------------------------------------------------------------------- 20-May-2006: ************ 12:30 E - Diffuse and very ragged front. It fades close to the inner edge of c3. 16:30 WSW - Faint (becoming brighter in C2 as it develops) and elongated feature developing toward W. It fades throughout C3. ---------------------------------------------------------------------------------- 21-May-2006: No significant activity. ************ ---------------------------------------------------------------------------------- 22-May-2006: ************ 00:06 E - Faint and diffuse loop front that fades throughout C2. 06:06 E - Another faint and diffuse front. 20:30 ESE - Faint and diffuse ragged loop front with diffuse loop-like extensions on ENE. By 21:08 UT, a very faint and diffuse loop- like feature can be seen expanding on W, fading throughout the C2 FOV. By 23:06 UT the S Pole is covered (though the signal quickly fades there). The part of the event developing toward E appears very faint in C3 (and visible only close to the inner edge of the C3 FOV). GOES recorded a B6.4 X-ray flare on NOAA AR 10884 (S13E14) between 19:37 - 20:06 UT with peak emission at 19:52 UT. EIT 195 images show a CME signature coming out from AR 10884 between 19:36 - 21:12 UT, characterized by the formation of a dimming region mainly to S of the AR. ---------------------------------------------------------------------------------- 23-May-2006: ************ SE - The development of an extremely faint expanding loop front (only discernible in C2) continues on SE, in the trailing material of the event reported to start at 20:30 UT on previous day. By 04:06 UT it is no longer discernible. 16:30 E - Thin jet-like front. ---------------------------------------------------------------------------------- 24-May-2006: ************ 20:30 E - Faint and diffuse front that quickly fades. ---------------------------------------------------------------------------------- 25-May-2006: ************ 19:31 W - Faint and diffuse loop front that fades close to the inner edge of C3. A ragged loop front follows at 20:58 UT. Slow development, so they are quickly surpassed by the event reported to start at 00:06 UT on next day. GOES recorded a couple of B-class X-ray flares on NOAA AR 10885 (S12W21). They peaked at 18:30 UT (B1.3) and 19:06 UT (B1.5). EIT 195 images show a CME signature between ~ 18:12 - 19:25 UT. Also, formation of a dimming region starting at ~ 18:36 UT mainly to SE and S of AR 10885. ---------------------------------------------------------------------------------- 26-May-2006: ************ 00:06 WSW - Expanding and ragged loop front developing much faster than the Asymmetric events reported to start at 19:31 UT on previous day. The C2 HALO occulting disk is apparently fully covered by 02:30 UT on next day, the signal on E being just above the limb, while on W the LE of the event is already past the outer edge. The event is first seen in C3 at 00:42 UT, just appearing above the W Limb (barely visible on E, save for the presence of an elongated loop front, whose association to the main event is difficult to discern -if any-). The mean plane-of sky speed of the LE at PA 250 was ~ 470 km/sec showing a slight deceleration. GOES recorded a B5.4 X-ray flare on NOAA AR 10884 (S13W29) on 05/25 between 23:03 - 23:43 UT with peak emission at 23:28 UT. EIT 195 images show signatures of a CME developing from AR 10884 toward SSW starting on 05/25 at 23:12 UT. Formation of a dimming region to SSW of AR starting on 05/25 at 23:24 UT. The event has therefore been catalogued as a very faint and asymmetric Halo Event, frontsided. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060526 06:54 SW - Very faint and diffuse loop front that fades throughout C2. 08:54 WNW - Faint ragged front starts to be discernible. 10:54 SE - Faint and diffuse loop front. It fades throughout C2. **** EIT long pre-bake cal set between 2006/05/26 21:15 UT - 05/27 05:15 UT **** ---------------------------------------------------------------------------------- 27-May-2006: KEYHOLE (26 m) ************ **** EIT CCD Bakeout bewtween 2006/05/27 ~ 02:00 UT - 06/06/15 ~ 08:00 UT. **** **** LASCO will be in improved synoptics during the Keyhole: **** **** 12 minute C2, 30 minute C3 cadences. **** ESE - Some gusty outflow till around 09:00 UT. 12:48 SW - Very faint jet-like front. 15:12 WSW - Extremely faint and diffuse front that quickly fades. 19:12 SE - Extremely faint front that quickly fades. ---------------------------------------------------------------------------------- 28-May-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 16:36 SE - Ragged loop front, barely visible in C3. 18:00 W - Ragged front. It fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 29-May-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 21:12 SSW - Very faint and diffuse front expanding toward the S Pole. ---------------------------------------------------------------------------------- 30-May-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 19:24 W - Diffuse brightening just appearing develops as a faint loop front, brighter to N. It fades very close to the inner edge of C3. 21:36 E - Extremely faint and diffuse front that quickly fades. ---------------------------------------------------------------------------------- 31-May-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ 05:48 E - Very faint 'curved' fan-like front. It fades very close to the inner edge of C3, 11:12 E - Extremely faint and diffuse front that quickly fades. 15:00 E - Very faint and diffuse front. It fades very close to the inner edge of C3. 16:48 W - Ragged and slightly expanding loop front. It fades throughout C3. 21:48 E - Faint and ragged loop front. It fades throughout C3. ================================================================================== 01-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ 01:12 W - Very faint fan-like front that quickly fades. 03:48 E - Initially bright ragged loop front. ---------------------------------------------------------------------------------- 02-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ WSW - Slow development of a system of loops since early in the day. Difficult to give an exact time of first appearance. Twisted core material can be seen after the data gap. **** LASCO Data Gap between 07:36 - 13:12 UT (C2 time). **** **** LASCO Data Gap between 21:12 - 24:00 UT (C2 time). **** ---------------------------------------------------------------------------------- 03-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ 00:36 ESE - Faint and diffuse preceding the slow development of a system of faint loop fronts. Pseudo-continuous outflow superposes in the LOS with the system of loops. 13:12 SW - Faint blob-like front (top of an extremely faint loop-like feature) starts to be discernible. The feature fades throughout C3. 16:24 WSW - Very ragged front that fades throughout C3 (rather close to its inner edge). A ragged and diffuse (smaller) front follows at 18:36 UT. ---------------------------------------------------------------------------------- 04-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ 04:12 W - Couple of small and faint blob-like fronts, one in WNW and the other one in WSW. 10:00 E - Very faint and diffuse loop front that quickly fades. ---------------------------------------------------------------------------------- 05-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO doors close for maneuvers on 2006/06/06: **** **** Last C2 image before safing taken at: 14:12 UT **** **** Last C3 image before safing taken at: 14:18 UT **** ---------------------------------------------------------------------------------- 06-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / ************ **** LASCO doors closed for S/C Maneuvers (Roll to **** **** -180 deg, Station Keeping, and Momentum Management) **** ---------------------------------------------------------------------------------- 07-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** First LASCO C2 image after recovery: 16:09 UT **** **** First LASCO C3 image after recovery: 16:14 UT **** 16:32 SW - Gusty outflow already present, fading early on next day. ---------------------------------------------------------------------------------- 08-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** June 8 - June 19, 2006: **** LASCO supports the Ulysses-SOHO Quadrature Observations with 6 hr **** cadence, C2 orange/clear filter pB sets taken at these times: **** 02:54, 08:54, 14:54, and 20:54 UT. The extra pB sequences will **** then continue through June 22, i.e., 14 days total (half rotation run). 08:12 SE - Extremely faint and diffuse 'curved' feature, barely visible in C3 (and only close to the oculting disk). 10:36 E - Ragged front followed by twisted trailing material. ---------------------------------------------------------------------------------- 09-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / Extra C2 pB images ************ 02:12 E - Faint elongated feature that fades throughout C3. 19:36 ENE - Very narrow and elongated loop front shifting to S as it develops. It fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 10-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / Extra C2 pB images ************ 18:36 NNE - Extremely faint expanding loop front that later spans all across the N Pole. It fades throughout C3. GOES recorded a B5.9 X-ray flare on NOAA AR 10892 (S08W07) between 16:34 - 16:47 UT with peak emission at 16:39 UT. No EIT images available due to EIT CCD bakeout. ---------------------------------------------------------------------------------- 11-Jun-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / Extra C2 pB images ************ 09:12 E - Extremely faint ragged blob-like front starts to be discernible. 12:00 SSW - Extremely faint diffuse jet-like front. ---------------------------------------------------------------------------------- 12-Jun-2006: KEYHOLE (26 m) / EIT CCD Bakeout / Extra C2 pB images ************ **** No significant activity. **** ---------------------------------------------------------------------------------- 13-Jun-2006: KEYHOLE (26 m) / EIT CCD Bakeout / Extra C2 pB images ************ 01:48 WSW - Elongated and very ragged loop front. Trailing material and then some gusty outflow. 09:24 E - Extremely faint and very ragged front (barely discenible) followed by an extremely faint gusty outflow. ---------------------------------------------------------------------------------- 14-Jun-2006: KEYHOLE (26 m) / EIT CCD Bakeout / Extra C2 pB images ************ **** No significant activity. **** ---------------------------------------------------------------------------------- 15-Jun-2006: End of EIT CCD Bakeout / Extra C2 pB images ************ SW - Extremely faint blob-like front starts to be discernible very early in the day. 02:48 SW - 'Pair formation', slightly above the occulter limb. 04:48 W - Very faint and rather diffuse loop front. It fades throughout C2. 17:48 WSW - Narrow ragged loop front (fan-like). It fades throughout C3. 18:48 WNW - Ragged and diffuse loop front. It fades very close the inner edge of the C3 FOV. ---------------------------------------------------------------------------------- 16-Jun-2006: EIT synoptic program resumed after CCD Bakeout / Extra C2 pB images ************ 15:06 W - Faint and diffuse loop front that fades throughout C2. 17:30 WSW - Ragged loop front, initially brighter to S. It fades close to the inner edge of C3. Some gusty outflow. 23:06 WSW - Very narrow loop (jet-like) front in the trail of previous event. ---------------------------------------------------------------------------------- 17-Jun-2006: Extra C2 pB images ************ 06:54 WSW - Jet-like front. 14:06 ESE - Diffuse brightening that fades throughout C2. 23:54 WSW - Diffuse brightening preceding a bright and ragged loop front (very early on next day) with a rather circular core. ---------------------------------------------------------------------------------- 18-Jun-2006: Extra C2 pB images ************ 08:30 NE - Ragged and diffuse expanding loop front system. 19:31 SW - Elongated loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 19-Jun-2006: Extra C2 pB images ************ 13:31 ENE - Faint ragged and diffuse loop front. It fades very close to the inner edge of C3. 17:54 SW - Diffuse and elongated loop front followed by an apparently different feature (also elongated loop front) at 18:54 UT. The event fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 20-Jun-2006: Extra C2 pB images ************ 12:06 ESE - Faint and diffuse front start to be discernible well above the C2 occulting disk (apparently, as a result of a 'pair formation' event). It fades throughout C3. Some more (very faint) loop fronts above the E limb along the rest of the day. 20:59 N - Very faint and diffuse narrow loop front (jet-like) that quickly fades. ---------------------------------------------------------------------------------- 21-Jun-2006: Extra C2 pB images ************ **** No significant activity. **** ---------------------------------------------------------------------------------- 22-Jun-2006: End of extra C2 pB images ************ 16:30 SE - Ragged and diffuse loop front, brighter to N. Very faint in C3. It fades throughout C3. ---------------------------------------------------------------------------------- 23-Jun-2006: ************ 05:30 NW - Faint expanding loop front starts to be discernible. Very faint in C3; it fades throughout its FOV. 09:30 ENE - Diffuse brightening precedes the development of a loop front, a little bit to S (first seen at ~ 11:30 UT). This second loop front develops toward E as an expanding (and wide) loop front followed by apparently twisted material. 14:06 SE - Elongated and ragged loop front at roughly the PA of the southern leg of previous event. It develops faster than previous event, and fades throughout C3. 21:30 N - Jet-like front. 22:30 WSW - Elongated and expanding loop front. A very diffuse and faint extension ahead of the loop front can be guessed in the C3 FOV, apparently spanning beyond the S Pole by 07:42 UT (on 06/24). ---------------------------------------------------------------------------------- 24-Jun-2006: ************ W - Some gusty outflow during the day in the form of small blob-like fronts that start to be seen above the occulting disk. 03:54 ENE - Very narrow loop front (jet-like) that fades throughout C2. ---------------------------------------------------------------------------------- 25-Jun-2006: ************ W - Gusty outflow continues. **** LASCO Data Gap between 15:06 - 20:30 UT. **** ---------------------------------------------------------------------------------- 26-Jun-2006: ************ 02:30 SSW - Ragged and expanding loop front system. It fades throughout C3. 06:30 E - Faint and diffuse front that quickly fades. 09:30 SW - Elongated, faint, and ragged loop front. Barely discernible in C3 (and only very close to the inner edge). 13:31 SE - Bright and thin feature superposed in the LOS with the slow development of a system of elongated loop fronts. A very faint and diffuse loop-like extension can be discerned on E. The bright feature quickly fades. 18:06 SW - Faint 'curved' feature. **** Annual Full Calibration Set for EIT and LASCO between **** **** 19:54 - 24:00 UT (C2 time). Therefore, NO synoptic images. **** ---------------------------------------------------------------------------------- 27-Jun-2006: ************ **** Annual Full Calibration Set for EIT and LASCO between **** **** 00:00 - 01:54 UT (C2 time). Therefore, NO synoptic images. **** 02:30 WNW - Faint and elongated loop front. Some gusty outflow all above the W Limb. 09:30 SE - An elongated and ragged loop front starts to be discernible (difficult to give an exact time of first appearance) in the trail of the event characterized by the slow development of loop fronts reported to start on previous day (entry at 13:31 UT). **** Annual Full Calibration Set for EIT and LASCO between **** **** 15:30 - 24:00 UT (C2 time). Therefore, NO synoptic images. **** ---------------------------------------------------------------------------------- 28-Jun-2006: ************ **** Annual Full Calibration Set for EIT and LASCO between **** **** 00:00 - 03:15 UT (C2 time). Therefore, NO synoptic images. **** 04:54 N - Diffuse and faint jet-like front. **** LASCO Data Gap between 16:54 - 18:52 UT (C2 time): **** **** ICAL01 (Intercalibration EIT/CDS). **** 20:30 SE - Faint and ragged elongated front. It fades throughout C3. 22:30 N - Jet-like front that quickly fades. ---------------------------------------------------------------------------------- 29-Jun-2006: ************ WSW - Slow development of a system of very faint loops since late on previous day (difficult to give an exact time opf first appearance). A twisted structure is discernible by around 07:31 UT. 20:30 NE - Very faint and elongated fan-like front that fades throughout C2. 22:30 SE - Elongated fan-like front. It fades throughout C3. ---------------------------------------------------------------------------------- 30-Jun-2006: ************ Coming soon... ================================================================================== 01-Jul-2006: ************ **** Temporary LASCO Data gap between 00:30 - 05:30 UT. **** 05:54 WNW - Jet-like front. **** Temporary LASCO Data gap between 07:31 - 12:06 UT. **** 12:30 ESE - Very faint and ragged front already under development after data gap. It fades throughout C3. 17:54 SSE - Jet-like front. **** Temporary LASCO Data gap between 18:30 - 24:00 UT. **** ---------------------------------------------------------------------------------- 02-Jul-2006: ************ **** Temporary LASCO Data gap between 00:00 - 06:54 UT. **** 06:54 WNW - Elongated loop front and rather circular core already under development after data gap. Development missed in following data gap. **** Temporary LASCO Data gap between 07:54 - 14:06 UT. **** **** Temporary LASCO Data gap between 15:06 - 20:58 UT. **** 23:06 WNW - Ragged blob-like front. ---------------------------------------------------------------------------------- 03-Jul-2006: ************ **** Temporary LASCO Data gap between 00:00 - 11:30 UT. **** W - Gusty outflow. 16:24 E - Very ragged front. It fades throughout C3. ---------------------------------------------------------------------------------- 04-Jul-2006: ************ 12:54 ESE - Fan-like front. It fades throughout C3. 21:30 SSW - Bright loop front followed by ragged material expanding toward SW well along into next day. GOES recorded a C1.4 X-ray flare on NOAA AR 10898 (S08W12) between 19:06 - 21:41 UT with peak emission at 20:29 UT. EIT 195 images show expanding loops from S of AR 10898 between 19:36 - 02:48 (+1) UT. ---------------------------------------------------------------------------------- 05-Jul-2006: ************ SW - Wide and expanding faint loop fronts continue developing all along the day. Several B-class X-ray flares were recorded by GOES during the day on NOAA AR 10898. Moreover, a C1.2 X-ray flare was recorded on AR 10898 (S10W22) between 08:42 - 09:13 UT with peak emission at 08:58 UT. EIT 195 images show another eruption from the SW side of AR 10898 between 08:12 - 11:48 UT. Loops that formed after eruption on previous day linking the AR with the diffuse field to SW now open and erupt. ---------------------------------------------------------------------------------- 06-Jul-2006: ************ 00:54 SW - Diffuse brightening precedes the development of a ragged and diffuse expanding loop front, which fades throughout C3. GOES recorded a B5.2 X-ray flare on NOAA AR 10898 (S09W33) between 00:01 - 01:11 UT with peak emission at 00:40 UT. EIT 195 images show a brightening to SW of AR 10898 between around 01:48 - 03:48 UT (loops reconnect there). 08:54 SW - Bright and very wide loop front with bright inner core. The Asymmetric event expands from the NW to the SE (clockwise) appearing as HALO at least a Partial Halo Event short after first appearing. A slight increase of cosmic rays (solar protons) can be observed in C2 by the time. Very faint extensions seem to surround the C2 occulting disk by 12:30 UT. Gusty outflow follows. The event is first seen (barely appearing all above the SW limb) at 09:18 UT. Close inspection of the C3 sequence shows the development of 2 fronts (and the inner core): one [1] a little bit ahead developing toward SW (not as wide and bright as the other), and the other [2], much wider and brighter. The latter seems to fully surround the C3 occulting disk by 16:18 UT. By that time its LE is almost at the end of the FOV (note that the LE of [1] is by that time already past the outer edge of the C3 FOV). The mean plane-of-sky speed of the LE of the two fronts mentioned is as follows (based on C3 data): . [1]: at PA 207: ~ 900k km/sec showing practically no acceleration, and . [2]: at PA 225: ~ 630 km/sec showing a slight acceleration. GOES recorded an M2.5 X-ray flare on NOAA AR 10898 (S09W35) between 08:13 - 08:51 UT with peak emission at 08:36 UT. EIT 195 show a strong brightening on AR 10898 starting at 08:12 UT and the eruption of a filament sitting at the core of the AR. Extensive dimming regions to SW and NE of AR (extending till late afternoon). ---------------------------------------------------------------------------------- 07-Jul-2006: ************ ENE - Much gusty ourflow all along the day. WSW - Much gusty outflow and small ragged blob-like fronts all along the day. 03:54 W - Elongated and diffuse loop front, brighter to N. Barely discernible in C3, and only close to the inner edge. 15:06 W - Faint and ragged front. 18:54 W - Very faint loop-like front starts to be discernible. Not discernible in C3. 22:30 W - Elongated fan-like front developing toward WNW. 23:06 E - Ragged loop front superposed in the LOS with the gusty outflow. It fades throughout C3. ---------------------------------------------------------------------------------- 08-Jul-2006: ************ 01:31 W - Thin, elongated, and initially bright loop front. 02:30 W - Similar feature to that reported at 01:31 UT, developing slightly toward S of it. 05:30 SSW - Elongated and very diffuse loop-like front. It fades throughout C2. 07:31 W - Very thin loop front (jet-like). It fades throughout C2. 09:54 W - Another feature similar to that one reported at 02:30 UT. 16:54 W - Diffuse and initially bright loop front that fades very close to the inner edge of C3. 21:30 E - Gradual development of a diffuse front followed by apparently twisted trailing material. The event fades throughout C3. ---------------------------------------------------------------------------------- 09-Jul-2006: ************ 05:30 SW - Diffuse 'half-loop' front expanding toward S. It fades throughout C3. 11:30 WNW - Elongated loop front (top fan-like) brighter to N. It fades throughout C3. A loop-like structure that quickly fades can be seen by the time above the W limb. 14:06 W - Loop-like structure that quickly fades, similar to that one reported in previous event. 15:54 WNW - Another elongated loop front with faint loop-like extensions to S. A loop-like structure that quickly fades can again be seen by the time on W, as in the event reported to start at 11:30 UT. Some infalling material on WSW. 19:31 NE - Extremely faint (barely discernoble) and diffuse front (only discernible in C2). ---------------------------------------------------------------------------------- 10-Jul-2006: ************ E - Very slow and gradual development of an extremely faint system of loops since early in the day. 02:54 N - Jet-like front. 04:30 SW - Faint elongated loop front that fades close to the inner edge of C3. 20:54 E - Gradual development of a faint twisted structure. ---------------------------------------------------------------------------------- 11-Jul-2006: ************ 05:30 SW - Very faint and elongated front. Barely discernible in C3. 17:30 SW - Couple of faint loop-like fronts start to be discernible well above the occulting disk (one ahead of the other). They both fade throughout C3. ---------------------------------------------------------------------------------- 12-Jul-2006: ************ 02:06 WSW - Faint and elongated fan-like front that fades throughout C2. 15:30 E - The slow development of a system of very faint and diffuse loops starts to be guessed. It is difficult to give an exact time of first appearance. Some reconection-type events on ESE along a streamer. 20:06 ENE - Diffuse and very ragged front. Pseudo-continuous outflow all above the E limb well into next day. The slow development of a likely system of loops superposes in the LOS. ---------------------------------------------------------------------------------- 13-Jul-2006: ************ W - Slow development of a system of faint and diffuse loop fronts since early in the day [1]. 06:30 NE - Ragged anf faint blob-like front starts to be discernible. It fades throughout C3. 15:06 W - A bright front starts to be seen behind a diffuse cusp (see [1]). It develops as a big and twisted feature. 21:54 E - A very faint and ragged front starts to be guessed. Difficult to give an exact time of first appearance. It is first clearly seen in C3 at 23:18 UT, though is then quickly surpassed by the event reported to start at 00:54 UT on next day. 22:30 SW - Jet-like front. 23:30 NW - Jet-like front. ---------------------------------------------------------------------------------- 14-Jul-2006: ************ 00:54 E - Ragged front developing apparently faster than the pseudo- continuous outflow already present. 04:30 E - Ragged front starts to be discernible developing slightly toward ESE. Some blob-like fronts follow all above the E Limb, all along the day. 05:54 N - Very thin loop (jet-like) front that fades throughout C2. 06:30 ESE - Slow development of a system of ragged (and not-well defined) loop fronts superposed in the LOS with the pseudo-continuous outflow (difficult to give an exact time of first appearance). Several similar fronts follow, all along the day. They fade throughout C3. ---------------------------------------------------------------------------------- 15-Jul-2006: ************ 00:30 ESE - Ragged loop front in the pseudo-continuous outflow. It fades throughout C3. 10:34 SW - Very faint fan-like front followed by another one at ~ 12:30 UT. They both fade throughout C2. ---------------------------------------------------------------------------------- 16-Jul-2006: No significant activity... ************ ---------------------------------------------------------------------------------- 17-Jul-2006: ************ 08:30 NNW - Very faint jet-like front that quickly fades. 09:30 W - Initially bright ragged loop front. 13:31 SSW - Diffuse front preceding a brighter and ragged loop front that spans all above the S Pole. A system of wide loop fronts follows (the development extends till around the end of the day). The ragged loop front is first seen in C3 above the S Pole at 15:42 UT, while the system of loops seems to be first seen at ~ 19:42 UT, fading then throughout C3. GOES reported by the time some A-class X-ray flares from NOAA AR 10900 (around ~ S04E02). 14:30 W - Very narrow loop-like front. 17:30 W - Another narrow loop-like front. Faint ragged extensions to N. ---------------------------------------------------------------------------------- 18-Jul-2006: ************ SE - The development of a system of faint and expanding loop fronts (toward S) continue during the day (see event at 13:31 UT on previous day). Some narrow ragged loop fronts on ESE. 10:30 ESE - Narrow ragged loop front clearly discernible. It fades throughout C3. ---------------------------------------------------------------------------------- 19-Jul-2006: ************ 09:54 E - Extremely faint and diffuse loop front that quickly fades. 17:30 W - Very faint and diffuse front that quickly fades. ---------------------------------------------------------------------------------- 20-Jul-2006: ************ **** EIT CME Watch Program in 171 A between **** **** 2006/07/20 00:00 UT - 2006/07/28 24:00 UT. **** 08:54 WSW - Extremely faint and diffuse front (in fact, barely discernible). It quickly fades. EIT 171 images show formation of a dimming region to SW of AR 10900 starting at ~ 08:00 UT. It develops toward NE. 13:54 SE - Expanding and bright loop front, which is then followed by a Partial core develops as a Partial Halo Event. The southern leg of the HALO event crosses the S Pole by around 16:06 UT. The event is first seen in C3 at 15:18 UT just appearing above the ESE limb. By 15:42 UT, the bright loop front of the event is clearly discernible. By 19:42 UT, the event spans in C3 ~ 160 deg (from PA 067 - 227), though it seems to continue expanding. The mean plane-of sky speed of the LE at PA 125 was ~ 375 km/sec showing a slight acceleration (LE at 12.5 solar radii at the time of measuring the speed -last frame used taken at 12:42 UT-). GOES recorded no significant X-ray activity during the day (A-level). EIT 171 images show the eruption of a big filament that extends all the way from the SE limb (apparently extending toward the backside of the disk) to the central meridian (close to the equator). The eruption seems to start at about 12:36 UT when a small brightening can be seen on the disk close to the SE limb. Nice post-eruption loops along the filament channel start to be seen by around 14:12 UT (centroid -most visible part- of the post-eruption loops at around S24E22). In summary, the event was catalogued as a Partial Halo Event, with an important frontsided component, associated to a filament eruption on the SE quadrant (and possibly extending behind the limb). See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060720 ---------------------------------------------------------------------------------- 21-Jul-2006: EIT CME Watch Program in 171 A / No significant activity... ************ ---------------------------------------------------------------------------------- 22-Jul-2006: EIT CME Watch Program in 171 A ************ 00:30 SSE - Very faint and diffuse front starts to be discernible. Barely visible in C3. 01:31 NNW - Faint jet-like front that quickly fades. 06:30 WSW - Very ragged (not-well-defined) and thin feature. It fades throughout C3. 16:30 S - Diffuse jet-like front that quickly fades. ---------------------------------------------------------------------------------- 23-Jul-2006: EIT CME Watch Program in 171 A ************ 14:54 WSW - Bright blob-like front (though apparently connected to the Sun throughout its development) starts to be visible. It fades throughout C3. 16:30 SSE - Jet-like front. 18:30 S - Extremely faint (barely discernible) loop-like front. It can be seen in C3. ---------------------------------------------------------------------------------- 24-Jul-2006: EIT CME Watch Program in 171 A ************ 05:30 W - The development of a very ragged front starts to be discernible. It is followed by twisted material. The event fade throughout C3. Some gusty outflow afterward, well into next day. ---------------------------------------------------------------------------------- 25-Jul-2006: EIT CME Watch Program in 171 A ************ 09:54 NE - Very thin (jet-like) front. It fades throughout C3. ---------------------------------------------------------------------------------- 26-Jul-2006: EIT CME Watch Program in 171 A ************ 01:54 WNW - Expansion of a small and faint loop front (see next event). 09:06 WNW - Gradual (and slow) development of a ragged and apparently twisted feature at the southern leg of the loop reported to start at 01:54 UT. The loop is then no longer discernible. **** LASCO Data Gap between 17:48 - 21:03 UT **** **** (C2 time) due to EIT Shutterless run. **** ---------------------------------------------------------------------------------- 27-Jul-2006: EIT CME Watch Program in 171 A ************ 01:31 NE - Development of system of diffuse loop fronts. Difficult to give an exact time of first appearance. Loop fronts continue appearing until past noon. The event fades throughout C3. 01:54 E - Diffuse and elongated front followed by another one at 03:06 UT. A diffuse loop front follows at 03:54 UT, partly superposed in the LOS with event at 01:31 UT. The event fades close to the inner edge of C3. 17:06 WNW - Ragged blob-like front (apparently the top of an elongated and thin feature) starts to be discernible. It fades throughout C3. 17:30 N - Jet-like front developing toward NNW. ---------------------------------------------------------------------------------- 28-Jul-2006: EIT CME Watch Program in 171 A ************ 03:06 ESE - Very faint fan-like front that fades close to the inner edge of C3. 06:06 N - Very faint and diffuse jet-like front. 12:30 WSW - Faint and diffuse brightening preceding the development of a system of faint and ragged loop fronts. Difficult to give an exact time of first appearance. 13:31 E - Very faint elongated loop front. It fades close to the inner edge of C3. 18:09 W - Gradual development of a loop front followed by a bright core. The event partly superposes in the LOS with event reported to start at 12:30 UT. The event extends weel into next day. Some gust outflow afterward **** 24:00 UT End of EIT CME Watch Program in 171 A. **** ---------------------------------------------------------------------------------- 29-Jul-2006: ************ W - Event reported to start at 18:09 UT on previous day continues its development. ---------------------------------------------------------------------------------- 30-Jul-2006: ************ **** LASCO Data Gap (C2 time) between 00:06 - 02:30 UT. **** 05:30 W - Ragged blob-like front preceded by a couple of similar (though smaller) fronts. 05:30 NNE - Very diffuse and thin (jet-like) front that quickly fades. 11:06 W - Another ragged blob-like front starts to be discernible. ---------------------------------------------------------------------------------- 31-Jul-2006: ************ 03:30 N - Very faint and diffuse jet-like front that quickly fades. 06:06 S - Very faint and diffuse front. Barely discernible in C3. 05:30 W - Ragged blob-like front starts to be discenible. Difficult to give an exact time of first appearance. More clear in the C3 FOV (close to the inner edge), where it is first seen at 08:18 UT. 13:31 N - Jet-like front. ================================================================================== 01-Aug-2006: ************ 01:31 SW - Ragged blob-like front starts to be discernible. It fades close to the inner edge of C3. 04:30 SW - Another blob-like front starts to be discernible a little bit to N of previous event, well above the occulting disk. It fades close to the inner edge of C3. 10:30 SE - Thin fan-like front. 18:06 W - Diffuse loop front that fades throughout C2. ---------------------------------------------------------------------------------- 02-Aug-2006: No significant activity... ************ **** No LASCO Data between 17:54 - 21:52 UT **** **** (C2 time) due to EIT Shutterless run. **** ---------------------------------------------------------------------------------- 03-Aug-2006: ************ 04:30 ESE - Blob-like front (though apparently connected to the Sun thoroughout its development). ---------------------------------------------------------------------------------- 04-Aug-2006: ************ 04:06 ESE - Extremely faint elongated (and slighlty expanding) loop developing slowly. Gusty outflow follows. 19:31 E - Ragged front that fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 05-Aug-2006: No significant activity... ************ ---------------------------------------------------------------------------------- 06-Aug-2006: ************ 00:30 SW - Initially bright front develops as a very faint and elongated ragged loop front. Barely discernible in C3. 13:31 SW - Ragged an elongated loop front apparently surpassed by a new (and brighter) front coming behind (see event at 15:06 UT). Therefore, it is not discernible in C3. 15:06 SW - Bright and elongated ragged loop front followed by an apparently twisted structure developing gradually. Some gusty outflow. 18:00+ ESE - Gradual development of a faint an apparently twisted (circular) structure. It becomes discernible late in the afternoon, so it is difficult to give an exact time of first appearance. ---------------------------------------------------------------------------------- 07-Aug-2006: ************ 01:31 NW - Faint expanding loop front apparently preceded by a fainter and Asymmetric expanding front. The latter fully surrounds the C2 occulting disk HALO by around 07:37 UT. The halo signature has elliptical shape (by that time the LE on NW is close to the end of the C2 FOV, and barely above the limb on SE). Note that gusty outflow (and some ragged fronts) can be seen along the day on SW. The halo event is first seen in C3 at ~ 08:20 UT on NW, just behind the pylon. The event is no longer discernible in C3 by 20:42 UT. It didn't reach the end of the FOV by that time (outermost part at ~ 17 solar radii -on NW-). The mean plane-of sky speed of the LE at PA 162 was ~ 170 km/sec. The accuracy of the measurements is poor due to the faintness and diffuseness of the LE. GOES recorded no significant X-ray activity during the day (A-level). Likewise, EIT 195 images do not show significant frontsided activity save some faint brightenings and apparent outflow to NW of a bright region on the SW quadrant (signature compatible with the C2 gusty outflow mentioned in the first paragraph). In summary, the event was catalogued as a very faint and slow Halo Event, most probably backsided based on the lack of activity at the appropriate location to be considered frontsided. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060807 11:54 SW - Ragged front. **** No LASCO CME Watch between 15:00 - 18:00 UT **** **** due to High cadence C2 polarization sequence **** **** (size 416x256, 100 sec exposure time). **** 20:54 SW - Ragged loop front. ---------------------------------------------------------------------------------- 08-Aug-2006: ************ 00:30 E - Diffuse brightening that quickly fades. 03:06 SW - Faint ragged front followed by a smaller and fainter one at ~ 08:00 UT on WSW. They both fade throughout C3. **** No LASCO CME Watch between 15:00 - 18:00 UT **** **** due to High cadence C2 polarization sequence **** **** (size 416x256, 100 sec exposure time). **** 18:30 SW - Another faint and ragged front already well under development after data gap (LE almost at the end of the C2 FOV). 23:30 SW - Another faint and ragged front. ---------------------------------------------------------------------------------- 09-Aug-2006: ************ 03:30 SW - Faint ragged front that fades throughout C3. **** No LASCO CME Watch between 15:00 - 18:00 UT **** **** due to High cadence C2 polarization sequence **** **** (size 416x256, 100 sec exposure time). **** 22:09 WNW - Initially bright ragged front. It fades throughout C2. ---------------------------------------------------------------------------------- 10-Aug-2006: ************ ESE - Since late on previous day, gusty outflow can be seen. Superposed in the LOS an apparently twisted structure develops gradually since early on the day (difficult to give an exact time of first appearance). The LE of this structure is firs seen in C3 at ~ 10:19 UT. 07:37 ENE - Slow development of a system of faint loop fronts. A twisted structure follows behind. By the end of the day it seems to move faster, apparently pushing the outer front, until reaching it. Gusty outflow. ---------------------------------------------------------------------------------- 11-Aug-2006: ************ 06:06 WNW - Elongated ragged front. 14:30 ESE - Very slow expansion of a system of loop fronts. Some pseudo- continuous outflow superposed in the LOS, all along the day and well into next day. ---------------------------------------------------------------------------------- 12-Aug-2006: ************ 05:54 S - Faint and diffuse jet-like front. 18:06 ESE - Slow development of a system of wide and expanding loop fronts. A bright feature (core) shows up early on next day. Deflection of pre-existent structures on E and past the S Pole. The outer edge of the event do not seem to cross the central meridian in the C3 FOV. Multiple B-class X-ray activity since late on the day through to the afternoon on next day on NOAA AR 10904 (around S11E35). ---------------------------------------------------------------------------------- 13-Aug-2006: ************ 19:31 WNW - Couple of ragged fronts starts to be discernible, well above the occulter limb. Difficult to give an exact time of first appearance. Another one follows at around 21:54 UT. ---------------------------------------------------------------------------------- 14-Aug-2006: ************ 07:37 NNW - Diffuse fan-like front that quickly fades. 10:30 N - Very faint and diffuse loop front. Jet-like front at 11:06 UT coincident with the leg of the loop front just above the N Pole. The event fades throughout C2. 12:06 E - Ragged front gradually developing (apparently twisted as it develops). Diffuse fronts supperposed in the LOS. 16:30 NE - Jet-like front. 19:31 NNE - Jet-like front developing toward NE. ---------------------------------------------------------------------------------- 15-Aug-2006: ************ 13:31 W - Faint ragged front starts to be discernible. It fades throughout C3 (relatively close to the inner edge). 19:31 W - Another faint ragged front that also fades throughout C3. ---------------------------------------------------------------------------------- 16-Aug-2006: ************ 07:31 W - Ragged and diffuse front preceding the development toward SW of Asymmetric a system of wide and expanding (brighter) loop fronts. The HALO outermost front seems to fully cover the C2 occulting disk by 09:08 UT. The signal on the eastern hemisphere is extremely faint and just above the occulting disk, while on W it is already past the outer edge of the C2 FOV. The event is first seen in C3 at 08:18 UT appearing above the SW limb as a diffuse loop front. The brighter system of loops shows up at 10:19 UT. By that time, the outer front fully surround the C3 occulting disk (signal on the eastern hemisphere just above the occulter). The mean plane-of-sky speed of the outermost front of the event (very faint and diffuse) at PA 230 was ~ 600 km/sec (based on C3 data), showing practically no acceleration. GOES reported prior and during the time of the LASCO event, a couple of impulsive B-class X-ray flares on NOAA AR 10904 on top of B-level X-ray activity: i) a B2.1 (at S11W09) between 04:54 - 05:00 UT with peak emission at 04:57 UT, and ii) a B3.4 (at S13W16) between 08:12 - 08:19 UT with peak at 08:15 UT. EIT 195 images show the formation of a dimming region to N of AR 10904 starting at 07:13 UT. Between 08:48 - 11:46 UT, formation of loops connecting from quiet Sun and AR 10904 to bright plasma NW of AR. At 10:14 UT, loops in center of AR open and appear to eject material. The event has therefore been determined as a very faint asymmetrc full Halo Event, probably frontsided, based on the spatial and temporal correlation with the activity observed on and around AR 10904. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060816a **** 15:00 - 16:20 UT --> ICAL01 (Intercalibration for EIT with CDS). **** **** Therefore, NO LASCO CME Watch during that time. **** 16:30 S - Bright and wide loop front, the LE already half way to the end Asymmetric of the C2 FOV (note that there is a C2/C3/EIT 195 Full Field HALO data gap between around 14:30 and 16:30 UT due to EIT/CDS ICAL01 -Intercalibration for EIT with CDS- between 15:00 - 16:20 UT). By 17:30 UT, the LE of the event is already past the outer edge of C2, and diffuse extensions all around the outer edge of the event fully cover the occulting disk. The event was first seen in C3 at 16:42 UT appearing about the S Pole. By 19:42 UT the C3 occulting disk is fully covered (signal on N just above the occulting disk). The mean plane-of-sky speed of the outermost front of the event (it becomes very diffuse by the end of the C3 FOV) at PA 175 was ~ 915 km/sec (based on C3 data), showing a slight acceleration. GOES reported a long duration C3.6 X-ray flare on NOAA AR 10904 (S16W08) between 14:37 - 19:22 UT with peak emission at 16:17 UT. EIT 195 images show a brightening on AR 10904 starting at 16:24 UT, peaking at around 17:12 UT. Nice post-flare loops. Formation of a dimming region all around the AR, most discernible to S of AR. In summary, the event has been determined as an intense asymmetric Full Halo Event, frontsided, associated with the C3.6 LDE on AR 10904. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060816b ---------------------------------------------------------------------------------- 17-Aug-2006: ************ **** NO LASCO C2/C3 CME watch during 2006/08/17 due to **** **** a special Observation campaign with EIT (7 minute **** **** high cadence run in 304A until 08/18 22:00 UT. **** ---------------------------------------------------------------------------------- 18-Aug-2006: ************ **** NO LASCO C2/C3 CME watch during 2006/08/17 due to **** **** a special Observation campaign with EIT (7 minute **** **** high cadence run in 304A until 08/18 22:00 UT. **** ---------------------------------------------------------------------------------- 19-Aug-2006: EIT CCD Bakeout ************ **** 2006/08/19 - 2006/09/16 : EIT CCD Bakeout **** **** First C2 image taken at: 00:52 UT **** **** First C3 image taken at: 01:42 UT **** 03:12 W - Extremely faint ragged front, barely discernible from the background. 03:36 E - Faint and diffuse loop front. It fades throughout C2. 12:12 ENE - Faint fan-like front immediately followed to S by a faint and diffuse front. Another one on E at 14:24 UT. They all fade throughout C2. 15:12 ESE - Diffuse brightening along streamer. 17:00 W - Slow development of a system of faint loop fronts. Difficult to give an exact time of first appearance. It develops as a big twisted structure by the end of the day. Pseudo-continuous outflow superposes in the LOS. Multiple B-class X-ray activity since midday from NOAA AR 10904 (around S15W58). Also a C2.3 X-ray flare from AR 10904 (S13W59) between 21:13 - 21:23 UT with peak emission at 21:19 UT. 19:36 E - Iniially bright ragged loop front that fades very close to the inner edge of C3. ---------------------------------------------------------------------------------- 20-Aug-2006: EIT CCD Bakeout ************ 08:12 SW - 'Pair formation' in the trail of the event reported to start at 17:00 UT on previous day. Also some infalling material on WNW. 10:00 WNW - Slow development of a system of faint loop fronts. It develops as a twisted structure. Pseudo-continuous outflow superposed in the LOS. 13:00 SW - Bright loop front followed by bright twisted material. A bright ragged front can be seen by 16:48 UT in the trailing material. GOES recorded a C2.9 X-ray flare on NOAA AR 10904 (S16W75) between 16:27 - 16:34 UT with peak emission at 16:32 UT. 14:36 E - Diffuse loop front that fades throughout C2. 22:00 WNW - Ragged front in the trail of the event reported to start at 10:00 UT. ---------------------------------------------------------------------------------- 21-Aug-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 04:36 SW - Elongated structure that fades close to the inner edge of C3. 12:24 SE - Initially diffuse loop front develops as a ragged loop front. 19:36 E - Diffuse brightening develops as an initially bright loop front. The trail seems to be a twisted structure that fails to move outward. ---------------------------------------------------------------------------------- 22-Aug-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ E Slow development of a system of faint loops since very early in the day, followinf the event reported to start at 19:36 UT on previous day. Difficulkt to give an exact time of first appearance. The event develops as a big twisted structure well before noon. Pseudo-continuous outflow superposed in the LOS. 01:12 SW - Faint and small ragged front that fades throughout C2. 02:36 SW Another ragged front, brighter than the previous one. It fades throughout C3. Gusty outflow afterward in the form of sporadic small ragged fronts thru the afternoon. Some infalling material on the W Limb all along the day. 18:08 WNW - Small ragged front that fades troughout C2. ---------------------------------------------------------------------------------- 23-Aug-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 03:24 E - Faint brightening preceding the development of a twisted structure slightly toward ESE. The event is preceded by a couple of blob-like fronts early in the day. 07:12 WSW - Elongated and very faint loop front. 12:00 E - Faint loop front (slightly developing toward ESE) in the trailing material of the event reported to start at 03:24 UT. 22:36 SE - Very faint and diffuse loop front. It fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 24-Aug-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 02:24 SE - Faint and elongated ragged loop-like front. It fades throughout C3. 06:48 ENE - Diffuse brightening along streamer that fades throughout C2. 07:48 N - Diffuse jet-like front. 14:12 NNE - Jet-like front. 16:00 SE - Very Diffuse and not-well-defined front. It fades throughout C3. **** LASCO Data Gap between 20:57 - 23:12 UT (C2 Time). **** ---------------------------------------------------------------------------------- 25-Aug-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 00:12 SE - Elongated ragged loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 26-Aug-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 09:00 SE - Very narrow (jet-like) loop front. 10:00 SSW - Slow development of a system of very faint loop fronts. Diffucult to give an exact time of first appearance. 20:48 SSE - Diffuse brightening develops as a Partial Halo Event. Two Partial apparently different structures can be then distinguished during HALO its development: i) a very bright and expanding loop front developing mainly toward SSE [Feature 1], and ii) a ragged and wider loop front developing toward S, slightly behind [Feature 2]. The latter was first clearly seen in C2 at 21:12 UT. Feature 1 is first seen in C3 at 21:42 UT appearing on SSE, then developing as a bright and ragged loop front, while Feature 2 shows up above the S Pole by 22:18 UT. By 02:18 UT (on 08/27), the event considered as a whole (and mainly due to Feature 2) spans ~ 183 deg (from about PA 072 - 255). The mean plane-of-sky speed of the outermost front of the event (Feature 1) at PA 170 was ~ 730 km/sec (based on C3 data), showing practically no acceleration. Note that the LE of Feature 1 becomes very faint and diffuse by 00:42 UT (08/27). As for Feature 2, the mean plane-of-sky speed of its LE at PA 172 deg was ~ 585 km/sec. GOES reported a C2.5 x-ray flare on NOAA AR 10905 (S11E10) between 19:52 - 20:32 UT with peak emission at 20:07 UT. EIT was in CCD Bakeout mode, therefore no EIT images available. In summary, the event has therefore been determined as a Partial Halo Event, frontsided, associated with the C2.5 X-ray event on AR 10905. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060826 ---------------------------------------------------------------------------------- 27-Aug-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 14:00 E - Very diffuse and faint front that fades close to the inner edge of C3. 16:00 NNW - Diffuse jet-like front. 16:12 S - Jet-like front. 17:12 E - Very narrow loop front. 19:12 SSW - Elongated and ragged asymmetric loop front. ---------------------------------------------------------------------------------- 28-Aug-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO will NOT be recorded during **** **** DSN gaps between 08/28 - 09/16. **** **** LASCO Data Gap between 01:00 - 22:36 UT (C2 time). **** ---------------------------------------------------------------------------------- 29-Aug-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Data Gap between 01:00 - 14:36 UT (C2 time). **** 14:48 SE - Elongated loop front already under development after data gap. 15:36 SW - Elongated and asymmetric ragged front. **** LASCO Data Gap between 16:36 - 24:00 UT (C2 time). **** ---------------------------------------------------------------------------------- 30-Aug-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Data Gap between 00:00 - 03:12 UT (C2 time). **** **** LASCO Data Gap between 04:48 - 21:24 UT (C2 time). **** 21:36 WSW - Apparent trailing material of a CME that could have started during the previous data gap. ---------------------------------------------------------------------------------- 31-Aug-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Data Gap between 01:12 - 21:36 UT (C2 time). **** W - Much gusty outflow all above the W Limb. ================================================================================== 01-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ W - Gusty outflow all above the W Limb. **** LASCO Data Gap between 06:12 - 22:36 UT (C2 time). **** WSW - Much gusty outflow after data gap until about next data gap. ---------------------------------------------------------------------------------- 02-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Data Gap between 03:48 - 16:24 UT (C2 time). **** 20:57 S - Jet-like front. ---------------------------------------------------------------------------------- 03-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ 00:12 E - Bright asymmetric loop front. 03:48 WNW - Loop front. **** LASCO Data Gap between 05:00 - 14:36 UT (C2 time). **** WNW - Gusty outflow. **** LASCO Data Gap between 18:00 - 23:24 UT (C2 time). **** ---------------------------------------------------------------------------------- 04-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ 03:48 NE - Diffuse and very thin (jet-like) front developing toward E. 04:48 W - Faint blob-like front. **** LASCO Data Gap between 06:00 - 14:36 UT (C2 time). **** 16:36 W - Very bright ragged loop front developing slightly toward WSW. By 18:24 UT a loop front starts to be distinguished (it develops slower than the ragged loop front) preceeding an apparently twisted structure. GOES recorded a B2.8 X-ray flare on S05W89 between 15:54 - 17:07 UT with peak emission at 16:07 UT. **** LASCO Data Gap between 22:24 - 24:00 UT (C2 time). **** ---------------------------------------------------------------------------------- 05-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO Data Gap between 00:00 - 03:24 UT (C2 time). **** **** LASCO Data Gap between 06:00 - 17:12 UT (C2 time). **** **** LASCO closed doors ahead of maneuvers (SK and MM) on 2006/09/06: **** **** Last C2 image before closing doors: 18:00 UT **** **** Last C3 image before closing doors: 17:42 UT **** ---------------------------------------------------------------------------------- 06-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / Spacecraft Maneuvers ************ **** LASCO Doors closed (Spacecraft Maneuvers: **** **** Station Keeping and Momentum Management). **** ---------------------------------------------------------------------------------- 07-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** First C2 image after recovery: 22:24 UT. **** **** First C3 image after recovery: 23:18 UT. **** 22:24 ENE - Elongated (bright top) loop front already under development. ---------------------------------------------------------------------------------- 08-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ 00:00 WNW - A bright loop front - it can be discerned since 23:48 UT on C2 HALO previous day - (development missed in the next data gap). By 04:24 UT the loop front is close to the outer edge of C2. It appears surrounded by a fainter and much wider front spanning all across the western hemisphere up to past the S Pole. Just before the second data gap, the C2 occulter seems to be fully surrounded, though the signal on E is barely discernible and only very close to the occulting disk. More faint wide loop fronts continue appearing on W. Only one C3 frame (05:18 UT) shows something of the event. Though the event covers a big angle in the western hemisphere, the S Pole is not crossed by that time. Afterwards, there is another data gap, so nothing else can be said. After this second gap, C2 shows a loop front already developing on WSW. Very faint and diffuse loop-like extensions seems to be developing above the S Pole. C3 shows no remnant signatures of any Halo event. No EIT images are available due to EIT CCD bakeout (the bakeout will last until 09/16). GOES recorded a couple of short duration B-class X-ray flares on NOAA AR 10909 during the time of the first LASCO data gap: i) a B4.4 on S07E06 between 01:30 UT - 01:47 UT with peak emission at 01:39 UT, and ii) a B3.3 on S07E05 between 02:34 - 02:45 UT with peak emission at 02:39 UT. And then during the second data gap, it recorded a B5.6 on the same AR (S06E01) between 10:13 - 11:46 UT with peak emission at 10:58 UT. In summary, an apparently faint and asymmetric Halo Event was observed by LASCO C2. It is hard to say whether the different structures mentioned above belong to a unique event. It seems to exist a temporal correlation between the activity on AR 10909 and the faint and diffuse wide loop-like extensions aforementioned. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20060908 **** LASCO data gap between 00:12 - 04:12 UT. **** **** LASCO data gap between 05:24 - 14:24 UT. **** **** LASCO data gap between 16:36 - 23:36 UT. **** 23:36 SE - System of faint loops already under development after data gap. ---------------------------------------------------------------------------------- 09-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO data gap between 00:00 - 07:24 UT. **** 07:24 SE - Development of faint system of loops continues (LE already past the outer edge of C2). A faint twisted structure develops behind. **** LASCO data gap between 13:00 - 20:57 UT. **** ---------------------------------------------------------------------------------- 10-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO data gap between 00:24 - 07:12 UT. **** **** LASCO data gap between 10:12 - 23:12 UT. **** 23:12 E - Faint ragged front already under development after data gap. ---------------------------------------------------------------------------------- 11-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / Spcecraft Roll ************ **** LASCO data gap between 00:12 - 18:04 UT. **** **** LASCO closed doors prior to the roll ~14:15 UT **** **** and re-opened this same say ~18:30 UT. **** **** LASCO data gap between 19:36 - 23:48 UT. **** 23:48 ESE - Faint ragged front already under development after data gap. ---------------------------------------------------------------------------------- 12-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ **** LASCO data gap between 00:24 - 22:36 UT. **** 22:36 SW - Faint elongated loop already under development after data gap. ---------------------------------------------------------------------------------- 13-Sep-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout ************ ****LASCO data gap between 00:12 - 20:36 UT. **** 20:36 E - Big CME already under development after data gap. LE already past the outer edge of C2 FOV. 20:36 W - Faint twisted structure already under development after data gap (slow). ---------------------------------------------------------------------------------- 14-Sep-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ **** LASCO data gap between 01:24 - 20:48 UT. **** 20:57 UT E Limb 'Pair formation' (faint). ---------------------------------------------------------------------------------- 15-Sep-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ **** LASCO data gap between 01:00 - 22:36 UT. **** ---------------------------------------------------------------------------------- 16-Sep-2006: KEYHOLE (26 m) / EIT CCD Bakeout ************ 01:24 W - Diffuse and very narrow front that fades throughout C2. 06:00 W - Very narrow (brighter than the previous one) front. It fades in C3, close to its inner edge. 17:00 W - Loop front that fades throughout C2. **** LASCO data gap between 20:36 UT - 22:30 UT. **** 22:30 SW - Ragged blob-like front (connected to the Sun) already under development after short data gap. It fades throughout C3. ---------------------------------------------------------------------------------- 17-Sep-2006: KEYHOLE (26 m) ************ W - Some gusty outflow all along the day. 01:50 E - Very narrow loop front that fades throughout C2. 14:50 SSW - Faint and diffuse narrow front. It fades throughout C2. ---------------------------------------------------------------------------------- 18-Sep-2006: KEYHOLE (26 m) ************ 06:26 E - Faint front that quickly fades. 20:26 E - Diffuse and expanding ragged front developing toward ENE. It fades throughout C3. GOES reported a C1.0 X-ray flare on NOAA AR 10910 (S10E49) between 19:25 - 20:01 UT with peak emission at 19:45 UT. ---------------------------------------------------------------------------------- 19-Sep-2006: END KEYHOLE (26 m) ************ 00:54 E - Diffuse and very faint loop front that quickly fades. 02:30 SSW - Diffuse jet-like front. 19:31 ESE - Thin fan-like front. ---------------------------------------------------------------------------------- 20-Sep-2006: ************ 03:30 ESE - Elongated ragged loop front. 07:54 ESE - Asymmetric and diffuse loop front. It fades throughout C3. 14:06 SSW - Very faint and diffuse front that quickly fades. 18:30 SSW - Diffuse expanding loop front. It seems to expand all above the southern limb early on next day. By 04:06 UT on next day a system of very faint expanding loop fronts seems to develop on ESE. ---------------------------------------------------------------------------------- 21-Sep-2006: ************ 12:54 SW - Elongated front preceding an apparently twisted structure. 23:30 SE - Expanding and diffuse loop front. ---------------------------------------------------------------------------------- 22-Sep-2006: ************ SW - Gusty outflow. 12:11 SE - Elongated and diffuse loop front. 12:54 SE - Diffuse loop front. 13:31 WSW - Elongated fan-like front. It fades throughout C3. 23:06 SSW - Faint and expanding loop front. ---------------------------------------------------------------------------------- 23-Sep-2006: ************ 06:06 E - Initially bright front that quickly fades. 11:30 E - Bright ragged loop front. 15:30 E - Faint ragged loop front in the trailing material of previous event. It seems to fade throughout C2. 18:30 W - Eongated loop front that quickly fades. 20:58 E - Faint loop front. ---------------------------------------------------------------------------------- 24-Sep-2006: ************ 04:30 SW - Very faint loop front followed by a system of faint and diffuse expanding loop fronts all along the day and into next day. In particular, a brighter one at 12:30 UT, which develops afterward much brighter on the W Limb. ---------------------------------------------------------------------------------- 25-Sep-2006: ************ 00:30 SSW - Faint and diffuse loop front. It fades throughout C2. 00:54 E - Couple of faint fan-like fronts that quickly fade. 10:54 NW - Very narrow and elongated loop front. 12:06 SE - Faint elongated and slightly expanding loop front followed at 13:31 UT by an asymmetric loop front just a little bit to N. 16:30 W - Ragged blob-like front starts to be discernible. ---------------------------------------------------------------------------------- 26-Sep-2006: ************ 01:31 E - Wide and bright loop front that span about 135 degrees (from PA 030 - 165) by 03:54 UT in the C2 FOV (LE already past the outer edge of C2 by that time). By 02:54 UT, very faint and diffuse expanding extensions start to show up all above the N Pole. The event is first clearly seen in C3 at 02:42 UT, appearing above the E limb. EIT 195 images show signatures of a backsided CME (with origin apparently close to the limb) above the E limb by 00:12 UT. X-ray activity below the A-level by the time of the event as recorded by GOES. Gusty outflow. 07:31 SE - Elongated and diffuse loop front starts to be discernible. 10:06 E - Elongated and narrow front plus diffuse asymmetric loop front to S. 14:06 NE - Diffuse jet-like front. ---------------------------------------------------------------------------------- 27-Sep-2006: ************ E Limb Gusty outflow all along the day. Some small ragged fronts, in particular at: 01:54 (E), 02:06 (ESE), 03:06 (E), 07:54 (E), and 16:54 UT (ESE). ---------------------------------------------------------------------------------- 28-Sep-2006: ************ SW - Slow development of a system of faint loops since early in the day. 06:54 N - Diffuse jet-like front toward NNW. 07:31 E - Small ragged front starts to be visible. It fades close to the inner edge of C3. 18:54 SW - Ragged loop front superposed in the LOS with (developing faster than) the system of loops. Twisted trailing structure. 21:30 E - Bright loop front followed by a bright core at 21:54 UT. An apparently different feature (loop-like and elongated) develops then behind, first seen at 01:31 UT on next day. GOES reported a B1.3 X-ray flare on NOAA AR 10914 (S13E88) between 20:37 - 22:15 UT with peak emission at 21:46 UT. ---------------------------------------------------------------------------------- 29-Sep-2006: ************ E - Small ragged fronts all along the day. 00:30 W - Elongated fan-like front. 01:31 E - Elongated loop-like front in the trail of the event reported to start at 21:30 UT on previous day. 16:30 NW - Very faint asymmetric loop front ahead of an elongated (and brighter) loop front that fades throughout C3. 20:30 W - Diffuse fan-like front. 22:30 WSW - Faint and ragged loop front starts to be discernible. It fades throughout C3. ---------------------------------------------------------------------------------- 30-Sep-2006: ************ 06:30 W - Diffuse and elongated loop-like front. 07:31 WSW - Faint asymmetric loop front starts to be discernible. 12:54 E - Diffuse front that quickly fades. 16:30 WNW - Diffuse brightening preceding the development on W of a bright ragged loop front. GOES reported a B7.2 X-ray flare on NOAA AR 10915 (S06W55) between 16:43 - 17:26 UT with peak emission at 17:03 UT. 16:30 NNE - Very faint jet-like front. 17:54 ENE - Diffuse jet-like front. 18:54 E - Faint ragged front starts to be discernible. ================================================================================== 01-Oct-2006: ************ 11:54 W - Fan-like front preceding the development of a ragged loop front. 20:30 ESE - Diffuse brightening that quickly fades. 23:30 ENE - Bright loop front developing toward E. Very faint extensions to S. ---------------------------------------------------------------------------------- 02-Oct-2006: ************ 02:54 W - Jet-like front. 08:30 W - Fan-like front. 12:54 W - Fan-like front. 17:00 W - Very thin fan-like front. 18:06 W - Blob-like front. 20:54 W - Very thin fan-like front. ---------------------------------------------------------------------------------- 03-Oct-2006: ************ 00:30 N - Elongated and diffuse jet-like front. 04:30 W - Diffuse jet-like (very thin lopp-like) front. It fades close to the inner edge of C3. 09:06 W - Another diffuse jet-like (thin and elongated loop-like) front. It fades close to the inner edge of C3. 11:06 WSW - Faint and diffuse jet-like front that fades throughout C2. 21:30 WNW - Faint brightening that quickly fades. ---------------------------------------------------------------------------------- 04-Oct-2006: ************ 03:30 E - Diffuse and very faint loop front. It fades in C2. 06:54 N - Diffuse jet-like front. 08:30 W - Diffuse brightening just appearing precedes the development of a bright loop front first clearly seen in next frame at 08:54 UT. Core and twisted triling structure. ---------------------------------------------------------------------------------- 05-Oct-2006: ************ 03:54 NE - Jet-like front. 19:31 SE - Faint asymmetric ragged loop front that spans up to slightly past the S Pole (C2) by the end of the day. Extremely faint in C3. System of very faint expanding loop fronts follow on the S Pole early on next day. ---------------------------------------------------------------------------------- 06-Oct-2006: ************ 04:30 W - Faint and diffuse brightening that quickly fades. 16:54 W - Faint ragged front that quickly fades. 21:54 WNW - Another faint ragged front that quickly fades. ---------------------------------------------------------------------------------- 07-Oct-2006: ************ 00:06 ENE - Couple of ragged fronts start to be discernible. Well seen in C3 starting at 04:18 UT. One of them (on E) can in fact be distinguished since around 22:30 UT on previous day. 09:06 W - Wide ragged loop front that fades throughout C2. 16:30 WSW - Diffuse and faint ragged front that quickly fades. 18:54 WSW - Ragged loop front. It fades throughout C3. ---------------------------------------------------------------------------------- 08-Oct-2006: ************ 02:30 SW - Faint loop front starts to be discernible well above the C2 occulting disk. 06:30 S - Diffuse jet-like front toward SSE. 07:54 S - Jet-like front toward SSW. 10:34 WSW - Ragged front that quickly fades. 14:06 N - Jet-like front. 15:54 WSW - Ragged front that fades throughout C2. 20:30 W - Ragged front. It fades very close to the inner edge of C3. ---------------------------------------------------------------------------------- 09-Oct-2006: ************ 05:06 WSW - Faint and diffuse brightening that fades very quickly. 10:06 WSW - Another faint and diffuse brightening that quickly fades. 12:54 WSW - Another faint and diffuse brightening that quickly fades. 18:30 NE - Thin and elongated fan-like front. ---------------------------------------------------------------------------------- 10-Oct-2006: ************ ESE - Slow development of a system of loops since late on previous day preceding the development of a twisted structure. 10:54 WNW - Narrow brightening (jet-like) preceding a narrow and very elongated fan-like front. The event fades throughout C3. ---------------------------------------------------------------------------------- 11-Oct-2006: ************ 04:06 ESE - Blob-like front starts to be discernible. It fades throughout C3. 08:30 SW - Faint and diffuse brightening that quickly fades. 13:33 ESE - Not-well-defined front preceding an slightly expanding ragged loop front from which it is difficult to give an exact time of first appearance. The event fades throughout C3. 18:06 WNW - Blob-like front starts to be discernible. 22:30 NW - Diffuse and very faint front. Blob-like front to S. ---------------------------------------------------------------------------------- 12-Oct-2006: ************ **** No significant activity save some ragged blob-like fronts on West. **** NO LASCO CME watch between 19:54 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 13-Oct-2006: ************ 00:30 ENE - Extremely faint loop front followed by another one at ~04:30 UT. 05:54 WNW - Faint blob-ike front starts to be discernible. 09:30 W - Blob-like front starts to be discernible. It develops slightly toward WSW. ---------------------------------------------------------------------------------- 14-Oct-2006: ************ 03:30 W - Not-well-defined front that quickly fades. Similar fronts at 06:54, 08:54 and 14:06 UT. **** NO LASCO CME watch between 21:30 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 15-Oct-2006: ************ **** NO LASCO CME watch between 00:00 - 01:55 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** 01:55 SW - Slow development of a system of loops, already under development after data gap. An apparently twisted structure develops behind by the end of the day. 11:54 W - Initially bright ragged front. 18:06 ESE - Elongated fan-like front develops as an apparently twisted and elongated structure. It fades throughout C3. 21:08 SSE - Diffuse jet-like front. 23:06 W - Ragged loop front. ---------------------------------------------------------------------------------- 16-Oct-2006: ************ 02:06 WSW - Ragged front developing toward W. It fades throughout C3. Gusty outflow on W all along the day. 11:54 SW - Jet-like front. 13:55 SW - Very thin and elongated (jet-like) front just a little bit to S of previous event. It fades throughout C2. 20:30 WSW - Faint ragged front. ---------------------------------------------------------------------------------- 17-Oct-2006: ************ 00:30 WSW - Diffuse and very faint ragged front. 06:54 N - Faint and very thin fan-like front. 06:54 W - Brightening that quickly fades. **** NO LASCO CME watch between 20:06 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 18-Oct-2006: ************ **** LASCO Data Gap between 00:54 - 16:48 UT (C2 time) because **** **** of LASCO thermal issues due to EIT sector wheel hang. **** 18:35 NNW - Jet-like front. **** LASCO Data Gap between 18:53 - 21:50 UT(C2 time) **** **** because of EIT Shutterless Run #1. **** ---------------------------------------------------------------------------------- 19-Oct-2006: ************ 19:31 ESE - Thin fan-like front developing toward E. **** NO LASCO CME watch between 20:06 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 20-Oct-2006: ************ 00:54 W - Very faint ragged front that fades throughout C2. 14:54 W - Ragged front starts to be discernible. It fades throughout C3. **** NO LASCO CME watch between 20:06 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 21-Oct-2006: ************ 12:06 SW - Slow development of a system of extremley faint loop fronts. Difficult to give an exact time of first appearance. **** NO LASCO CME watch between 20:06 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 22-Oct-2006: ************ 19:31 E - Diffuse loop front (preceded by a very diffuse brightening at 18:54 UT). After the data gap it is seen developing as a very wide and expanding ragged loop front, already covering all the eastern hemisphere, LE past the outer edge of the C2 FOV (the event extends up to past the poles, reaching NNW and SSW). It is first seen in C3 on 10/23 at 00:42 UT, covering al the eastern limb. The mean plane-of-sky speed of the LE at PA 87 is ~ 242 km/sec, showing practically no acceleration (based on C3 data). No X-ray events were recorded by GOES, nor significant frontsided activity could be observed on EIT 195 images prior to the time of first appearance of the event in C2. Therefore, the source of the event is most probably on the backside of the disk, somewhere close to the E limb. **** NO LASCO CME watch between 20:06 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 23-Oct-2006: ************ E - Gusty outflow all along the day and well into next day. SE - Faint and expanding loop fronts continue developing all along the day. 02:06 SW - Bright blob-like front. Gusty outflow. ---------------------------------------------------------------------------------- 24-Oct-2006: ************ E - Gusty outflow continues all along the day. 03:54 N - Jet-like front. **** NO LASCO CME watch between 20:54 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 25-Oct-2006: ************ **** NO LASCO CME watch between 00:00 - 01:32 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** **** LASCO Data Gap between 14:58 - 18:06 UT (C2 time) **** **** due to EIT Shutterless Run #2. **** 19:48 WSW - Bright ragged front apparently surpassed at 21:30 by another front (brighter). 20:39 NW - Jet-like front. ---------------------------------------------------------------------------------- 26-Oct-2006: ************ 07:31 S - Jet-like front. 08:30 NE - Diffuse and faint jet-like front. ---------------------------------------------------------------------------------- 27-Oct-2006: ************ 14:06 W - Very faint front that quickly fades. 20:54 W - Another very faint front that quickly fades. ---------------------------------------------------------------------------------- 28-Oct-2006: ************ ENE - Slow development of a system of faint loop fronts since late on previous day. By 05:06 UT, a bright core starts to be discernible behind the leading front (gradual event). Some gusty outflow in the form of small ragged fronts all along the day afterward. **** NO LASCO CME watch between 14:33 - 19:05 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 29-Oct-2006: ************ 00:06 W - Small front that quickly fades. 06:54 E - Blob-like front. 07:54 W - Bright ragged front with faint and diffuse extensions to S. It fades throughout C3. **** NO LASCO CME watch between 14:30 - 21:54 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** 21:54 W - Faint asymmetric ragged loop front already under development after data gap. It fades throughout C2. ---------------------------------------------------------------------------------- 30-Oct-2006: ************ 02:54 W - Bright asymmetric loop front. It fades throughout C3. 11:54 W - Very faint and diffuse front. Barely discernible in C3. 15:30 W - Thin fan-like front that quickly fades. 20:54 SW - Elongated loop front. ---------------------------------------------------------------------------------- 31-Oct-2006: ************ 04:30 N - Faint and diffuse front all above the N Pole extending up to the HALO E limb (1). A brighter feature (ragged front) shows up on the W at 05:06 UT with some faint and diffuse extensions (2) to S up to the E Limb. All together, the event looks like a full halo event by this time ((elliptical shape), the signal being barely above the limb on the S Pole. Feature (1) is first seen in C3 at 05:18 UT, all above the E limb and N Pole. Feature (2) shows up on W at 06:42 UT, and at 08:18 UT the C3 occulting disk appears fully surrounded (difficult to establish the relationship between features (1) and (2)). The mean plane-of-sky speed of the outermost part of the LE of the complex event at different position angles is shown below (based on C3 data): . PA 085: ~ 450 km/sec (showing slight deceleration) . PA 310: ~ 670 km/sec (showing slight deceleration) . PA 204: ~ 210 km/sec (showing slight deceleration), most likely related to Feature (1). No frontsided signatures prior to the event on EIT 195 images, nor significant X-ray events were reported by the time. However, EIT 195 images seem to show the apparent slow lift-off of a prominence on NW between 03:48 - 11:12 UT, though it is really hard to say due to its faintness and size. In summary, the event has therefore been determined as a full Halo Event probably backsided based on the lack of significant frontsided activity. However, please be aware that EIT 195 images did not show signatures of a backsided event either. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20061031 **** NO LASCO CME watch between 19:54 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ================================================================================== 01-Nov-2006: ************ E - Slow development of a system of faint loop fronts since previous day. 05:54 N - Jet-like front. **** NO LASCO CME watch between 19:54 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 02-Nov-2006: ************ NW - Some gusty outflow all along the day. 13:31 SW - Elongated and faint loop-like front. It fades throughout C3. 13:31 NW - Not-well-defined and elongated front starts to be discernible. 'Pair formation' in the trail at ~ 15:12 UT (difficult to give a precise time). **** NO LASCO CME watch between 19:54 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 03-Nov-2006: ************ 01:31 NW - Blob-like front starts to be discernible. It fades throughout C3. 03:08 E - Faint and very diffuse loop-like front. 07:31 E - Elongated and diffuse loop-like front. It fades throughout C3. 12:06 E - Elongated and diffuse loop-like front (brighter than the two previous events). It fades throughout C3. 19:31 NE - Very bright and big loop front with diffuse extensions that spans up to past the N Pole. LE already midway to the end of the C2 FOV. Only one C3 frame captured the event (19:42 UT). No significant X-ray activity was recorded by GOES by the time (B-class). EIT 195 running difference images do show signatures of a rather important backsided event all above the NE limb starting at 19:13 UT. Development missed in the following data gap. **** NO LASCO CME watch between 20:21 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 04-Nov-2006: ************ 01:31 E - Fast fan-like front. It fades close to the inner edge of C3. **** LASCO Data Gap between 09:00 - 11:30 UT **** **** (C2 time) due to EIT sector wheel hang. **** 13:31 E - Bright elongated ragged loop front. Development missed in the following data gap. **** NO LASCO CME watch between 14:30 - 24:00 UT (C2 time) **** **** due to LASCO special program: polarization sequences. **** ---------------------------------------------------------------------------------- 05-Nov-2006: ************ 05:54 N - Jet-like front. 11:06 E - Elongated front preceding a slightly brighter elongated front (12:06 UT), which in turn precedes an even brighter ragged loop front (14:06 UT). 13:54 W - Very faint and not-well-defined front that fades throughout C2. 15:30 E - Another elongated ragged front. It quickly fades. 17:30 E - Bright narrow front develops as a big and very bright loop front Partial by 17:54 UT. At this time the LE on E is already past the outer HALO edge of the C2 FOV. Faint and diffuse extensions develop up to past the N Pole. By 18:54 UT the diffuse extensions seem to cover the C2 occulting disk. The event was first seen in C3 at 17:42 UT as a narrow front just showing up above the E Limb. By 18:18 UT, a wide and bright loop front spans all above the NE limb, with faint extensions up to past the N Pole. Signal too faint to be discernible on the S Pole. The mean plane-of-sky speed of the LE at PA ~ 70 was ~ 1520 km/sec. No significant X-ray activity was detected by GOES related either in time or space to this event. Just for completeness, there was a C3.7 X-ray flare on NOAA AR 10921 (S06W13) between 12:16 - 12:340 UT with peak emission at 12:40 UT. Likewise, EIT 195 images do not show significant frontsided activity related to the event, although they do show a rather important backsided CME event all above the NE Limb starting at around 17:24-17:36 UT. A wave can be seen developing coming from behind the E limb starting at 18:42 UT. The event has therefore been determined as an at least partial halo event backsided. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20061105 **** NO LASCO CME watch between 20:21 - 24:00 UT (C2 time), **** **** due to special observation program for Mars Express and **** **** Venus Express Campaign. **** ---------------------------------------------------------------------------------- 06-Nov-2006: ************ 00:42 NE - Faint ragged front already under development after data gap. 00:42 SSW - Faint ragged front already under development after data gap. 04:06 E - Bright fan-like front. 10:30 E - Bright elongated loop front. 14:30 E - Diffuse loop-like front. It fades throughout C2. 17:54 NE - Very bright front. Diffuse loop-like extensions develop to N, Asymmetric spanning across the N Pole by 18:06 UT. These diffuse extensions HALO surround the C2 occulting disk by 18:54 UT (bulk of the CME already well past the outer edge of the C2 FOV on E, signal on SW barely above the occulting disk). The event is first seen in C3 at 18:42 UT, the bulk of the CME heading toward NE and very bright, the loop-like extensions already covering all above the N Pole. The C3 occulting disk is fully surrounded by the loop- like extensions by 21:42 UT. By that time, the LE of the bulk of the event on NE already reached the end of the C3 FOV. The mean plane-of-sky speed of the LE at PA ~ 72 deg was ~ 1995 km/sec (based on C2 and C3 data). GOES recorded a C8.8 X-ray flare on N00E89 between 17:43 - 18:06 UT with peak emission at 17:46 UT. EIT 195 images show signatures of a big CME all above the E and NE limb starting at 17:36 - 17:48 UT. The source of the CME is in the backside, apparently barely behind the E Limb. A wave follows, covering as it develops most of the E part of the disk. In summary, the event has therefore been determined as a very asymmetric full halo, associated to a close-to-limb backsided event. Important wave signatures associated to the event could be seen all across the eastern part of the disk (in other words, be aware of the flank of the event). See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20061106 ---------------------------------------------------------------------------------- 07-Nov-2006: ************ 00:54 E - Initially bright loop front. GOES recorded a C1.2 X-ray flare on N01E89 between 00:24 - 00:41 UT with peak emission at 00:51 UT. 04:54 ENE - Elongated loop front. It fades throughout C3. 'Pair formation' just a little bit to S and small ragged fronts in the trail and to N by 07:31 UT. 13:31 ENE - Initially bright and elongated loop front develops as a bright ragged loop front. GOES recorded a C3.0 X-ray flare on N06W90 between 14:23 - 13:04 UT with peak emission at 12:55 UT. 16:54 SW - Slow development of a system of faint loop fronts followed by a twisted structure. The development continues well into next day. ---------------------------------------------------------------------------------- 08-Nov-2006: ************ SW - The slow development of a twisted structure continues. ENE - Some gusty outflow and small incoming blobs all along the day. **** NO LASCO CME watch between 18:06 - 24:00 UT (C2 time) **** **** due to special EIT observation program for Mercury Transit. **** ---------------------------------------------------------------------------------- 09-Nov-2006: ************ **** NO LASCO CME watch between 00:00 - 03:00 UT (C2 time) **** **** due to special EIT observation program for Mercury Transit. **** 03:12 SE - Slow development of a system of loop fronts already under development after data gap. 18:06 SE - Slow development of a very faint and diffuse loop front (toward the S Pole). 19:50 SE - Faint, diffuse and elongated loop front a litle bit to N of previous event (it develops faster). ---------------------------------------------------------------------------------- 10-Nov-2006: ************ W - Some gusty outflow all along the day. 16:06 WNW - Elongated ragged loop front. ---------------------------------------------------------------------------------- 11-Nov-2006: ************ 06:06 ENE - Ragged loop front. It fades throughout C2. 08:06 SE - Diffuse loop front. It fades throughout C2. 10:26 ENE - Elongated ragged front. It fades throughout C2. 14:06 ENE - Thin fan-like front that gades throughout C2. ---------------------------------------------------------------------------------- 12-Nov-2006: ************ 13:50 SW - Diffuse and very thin (jet-like) loop front. It fades throughout C2. ---------------------------------------------------------------------------------- 13-Nov-2006: ************ 00:26 W - Fan-like front developing toward WNW. It fades throughout C2. ---------------------------------------------------------------------------------- 14-Nov-2006: ************ 05:06 N - Diffuse jet-like front. 23:06 SE - Extremely thin feature develops early on next day as a ragged elongated loop with a fan-like front. The event fades throughout C3. ---------------------------------------------------------------------------------- 15-Nov-2006: ************ 07:27 W - Diffuse front. It fades close to the inner edge of C3. 19:50 ENE - Diffuse and faint ragged front that quickly fades. 19:50 SW - Faint and diffuse loop-like front that quickly fades. 22:26 WNW - Diffuse and very faint loop front that fades throughout C2. 23:50 SW - Faint and diffuse front that quickly fades. ---------------------------------------------------------------------------------- 16-Nov-2006: ************ 06:26 E - Faint and diffuse slow system of loops. It fades throughout C2. 08:26 SW - Faint and diffuse loop-like front. It fades very close to the inner edge of C3. 16:26 W - Faint ragged blob-like front developing slightly toward WSW. ---------------------------------------------------------------------------------- 17-Nov-2006: ************ 14:30 SW - Faint ragged front that quickly fades. 23:06 SW - Initially bright loop front. Iy fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 18-Nov-2006: ************ 10:34 SW - Faint ragged loop front. It fades throughout C2. 21:30 SW - Elongated ragged front. Falling material afterwards (apparently 'pair formation'). 23:54 NNE - Diffuse jet-like front. ---------------------------------------------------------------------------------- 19-Nov-2006: ************ 09:54 SW - 'Pair formation' along thin streamer. Difficult to give a precise time of occurrence. 10:56 E - Loop front that quickly fades. It is followed at 12:06 UT by another loop front that fades close to the inner edge of C3. Some gusty outflow. 15:30 SW - Brightening along thin streamer. 'Pair formation' behind. 21:30 SW - Ragged fan-like front. 23:54 SW - Ragged fan-like front (slightly brighter than the previous one). ---------------------------------------------------------------------------------- 20-Nov-2006: ************ 00:54 SW - Initially bright ragged front. 02:30 E - Ragged loop front with structured interior. Gusty outflow. **** LASCO Data Gap between 04:06 - 06:30 UT. **** 06:54 ENE - Gradual development of a faint and rather 'circular' structure. Difficult to give an exact time of first appearance. The event is surpassed close to the inner edge of the C3 FOV by the event reported to start at 18:06 UT. 06:54 WSW - Faint and narrow fan-like front precedes a slightly brighter narrow and ragged loop front (07:54 UT), which fades close to the inner edge of the C3 FOV. 11:30 SW - Bright and elongated ragged loop front. Faint ragged extensions to N. 16:30 SW - Ragged and elongated loop front. Diffuse and ragged loop-like extensions spanning up to WNW follow. 18:06 E - Brightening just appearing develops as a big and bright loop front followed by a structured and bright core. EIT 195 images show signatures of a wide CME above the E Limb between 17:36 - 18:48 UT, with origin in the backside of the Sun. 18:30 W - Diffuse and ragged loop front. 19:31 SW - Ragged and elongated loop front (smaller than previous ones). 21:54 W - Faint ragged front. ---------------------------------------------------------------------------------- 21-Nov-2006: ************ W - Gusty ouflow all along the day, especially on SW. 01:31 SW - Faint and ragged asymmetric loop front. It fades close to the inner edge of C3. 05:30 E - Big and bright loop front followed by a structured and bright core. Gusty outflow afterwards. EIT 195 images show signatures of a wide CME above the E Limb between 05:00 - 06:48 UT, with origin in the backside of the Sun. 16:54 SSE - Very faint loop-like front. ---------------------------------------------------------------------------------- 22-Nov-2006: ************ E - Gusty outflow in the form of small ragged blob-like fronts (in particular at 00:30, 04:54, and 07:31 UT). They can be seen since previous day, after the CME reported to start at 05:30 UT. 03:30 SW - Ragged elongated loop front. Diffuse extensions toward N. It fades throughout C3. 08:30 SW - Bright and elongated ragged loop front. It fades throughout C3. 11:06 SW - Bright ragged loop front. An apparently distinct diffuse loop front follows on W at ~ 12:06 UT. Gusty outflow all across the W limb. 16:30 SW - Faint and very diffuse ragged front that fades throughout C2. 17:54 SW - Initially bright ragged front that fades close to the inner edge of C3. 19:54 SW - Diffuse loop-like front a little bit to S of previous event. It fades throughout C3. 23:06 SW - Initially bright ragged front. It fades very close to the inner edge of c3. 23:54 W - Faint loop-like front developing slower than previous event. Difficult to give an exact time f first appearance. It fades throughout C3. ---------------------------------------------------------------------------------- 23-Nov-2006: ************ 04:06 W - Diffuse loop-like front. It fades throughout C3. 09:54 SW - Diffuse ragged front that fades throughout C2. 13:31 SW - Bright loop front. Trailing material. 17:54 SW - Small and elongated loop front in the trailing material of previous event. Diffuse loop-like extensions on W. 18:54 N - Diffuse jet-like front. ---------------------------------------------------------------------------------- 24-Nov-2006: KEYHOLE (26 m) ************ 02:06 SW - Fan-like front. 04:06 NW - A very faint leg of an apparently big expanding loop front starts to be discernible, reaching the N Pole by ~ 05:06 UT (barely discernible in C3). By 04:30 UT a very faint loop front starts to be discernible on SW. 06:30 NW - Ragged front that fades throughout C2. 08:30 W - Diffuse ragged loop-like front. It fades close to the inner edge of C3. 08:30 ESE - Diffuse front that quickly fades. 11:30 W - Diffuse ragged front developing slightly toward WNW. It then superposes in the LOS with the following event. 12:30 W - Ragged loop front. It fades throughout C3. 19:31 SW - Small front that quickly fades. 23:06 SW - Small front with fainter extensions toward N. It fades throughout C2. ---------------------------------------------------------------------------------- 25-Nov-2006: KEYHOLE (26 m) ************ **** 2006/11/25 - 2006/12/12 : EIT CCD Bakeout **** 00:30 ENE - Bright ragged front. It fades close to the inner edge of C3. 00:30 NW - Faint and diffuse asymmetric ragged front. Difficult to give an exact time of first appearance. 03:54 W - Slow development of a system of faint ragged loop fronts. Difficult to give an exact time of first appearance. Pseudo- continuous outflow superposeed in the LOS. 12:06 S - Faint and wide loop-like front. It fades throughout C3. 21:39 SW - Bright and very elongated loop-like front. It fades throughout C3. ---------------------------------------------------------------------------------- 26-Nov-2006: KEYHOLE (26 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ 14:24 SW - Diffuse ragged front that quickly fades. Another one follows at 15:48 UT. 20:36 ENE - Elongated loop front along streamer. ---------------------------------------------------------------------------------- 27-Nov-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO will NOT be recorded during DSN gaps until around December 7. **** 04:00 SW - Faint and diffuse loop-like front. Faint extensions toward N. **** LASCO Data Gap between 06:36 - 14:48 UT (C2 time). **** 14:48 SW - Trailing material of an event that most surely started during previous data gap. **** LASCO Data Gap between 15:36 - 24:00 UT (C2 time). **** ---------------------------------------------------------------------------------- 28-Nov-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Data Gap between 00:00 - 05:48 UT (C2 time). **** **** LASCO Data Gap between 07:36 - 20:00 UT (C2 time). **** 20:48 UT W - Small and very faint ragged front that fades throughout C2. ---------------------------------------------------------------------------------- 29-Nov-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Data Gap between 00:00 - 06:12 UT (C2 time). **** **** LASCO Data Gap between 07:36 - 18:24 UT (C2 time). **** 19:00 ENE - Slow development of a system of faint loop fronts. Difficult to give an exact time of first appearance. There is big twisted structure under development after following data gap (see entry at 10:12 on next day). ---------------------------------------------------------------------------------- 30-Nov-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Data Gap between 00:00 - 10:12 UT. **** 10:12 ENE - Big twisted structure already under development after data gap. LE already past the outer edge of the C2 FOV. **** LASCO Data Gap between 13:24 - 17:12 UT (C2 time). **** **** LASCO Data Gap between 21:36 - 24:00 UT (C2 time). **** ================================================================================== 01-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Data Gap between 00:00 - 06:12 UT (C2 time). **** **** LASCO Data Gap between 07:36 - 15:48 UT (C2 time). **** **** LASCO Data Gap between 20:57 - 24:00 UT (C2 time). **** ---------------------------------------------------------------------------------- 02-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Data Gap between 00:00 - 04:24 UT (C2 time). **** 05:00 ESE - Diffuse front followed by a ragged front on E at at ~ 07:24 UT. **** LASCO Data Gap between 05:48 - 07:24 UT (C2 time). **** 07:24 WNW - Ragged front already under development after data gap. **** LASCO Data Gap between 08:00 - 14:12 UT (C2 time). **** **** LASCO Data Gap between 15:36 - 24:00 UT (C2 time). **** ---------------------------------------------------------------------------------- 03-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Data Gap between 00:00 - 06:36 UT (C2 time). **** 06:36 ESE - Faint ragged front just under development after data gap. **** LASCO Data Gap between 08:12 - 14:24 UT (C2 time). **** 14:48 ESE - Very faint ragged front. **** LASCO Data Gap between 15:48 - 22:36 UT (C2 time). **** ---------------------------------------------------------------------------------- 04-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Data Gap between 00:12 - 04:24 UT (C2 time). **** 04:36 E - Ragged loop front. **** Last C2 image before closing doors: 08:12 UT (ahead of Maneuvers on 12/05). **** Last C3 image before closing doors: 08:18 UT (ahead of Maneuvers on 12/05). ---------------------------------------------------------------------------------- 05-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / NO LASCO images ************ **** LASCO Doors closed for Maneuvers (SK, MM, and Roll) **** **** NOTE: As recorded by GOES, during the last 24 hs multiple B-and C-class X-ray activity was being produced by a new region now rotating over the SE Limb -NOAA AR 10930- (little bit to S of NOAA AR 10929). GOES SXI identifies this new region as the responsible of an X9.0 X-ray flare between 10:18 - 10:45 UT with peak emission at 10:35 UT (centroid at S07E68). The region produced also an M1.8 X-ray flare (S07E73) between 07:45 - 08:06 UT with peak emission at 08:03 UT. ---------------------------------------------------------------------------------- 06-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** LASCO Doors closed until ~ 19:00 UT **** **** because of SOHO Maneuvers on 2006/12/05. **** **** First C2 image taken after opening doors: 20:12 UT. **** First C3 image taken after opening doors: 20:18 UT. 20:24 SE - Signatures of a strong halo Event (already past the outer edge HALO of the C2 FOV), most likely associated to the X6.5 X-ray flare occurred on NOAA AR 10930 (see NOTE below). Gusty outflow on SE well into next day. Snow proton storm, gradually increasing. **** NOTE: Multiple C-class X-ray activity during the day. On top of that, GOES recorded: I) an M6.0 X-ray flare on NOAA AR 10930(S02E65) between 08:02 - 09:03 UT with peak emission at 08:23 UT. II) an X6.5 X-ray flare on NOAA AR 10930 (S05E64) between 18:29 - 19:00 UT with peak emission at 18:47 UT. ---------------------------------------------------------------------------------- 07-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** C2 and C3 images highly degraded (degradation increases along the day) **** by ongoing proton storm following events on previous days on NOAA AR 10930. **** Some faint events can be missing. SE - Trailing material of the event reported on Entry at 20:24 UT on previous day. 19:37 SE - Bright loop front most probably associated with the M2.0 X-ray flare recorded by GOES on NOAA AR 10930 (S06E45) between 18:20 - 19:33 UT with peak emission at 19:13 UT. Note that also multiple B- and C-class X-ray flares occurred during the day. ---------------------------------------------------------------------------------- 08-Dec-2006: KEYHOLE (26 m & 34 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** Images still highly degraded by the ongoing proton **** storm, which starts subsiding by the end of the day. 00:00 SE - A CME (most likely trailing material of event reported to start at 19:37 UT on previous day) can be guessed under development in the highly degrades C2 and C3 images. **** LASCO Data Gap between 13:33 - 18:46 UT (C2 time). **** 19:19 WNW - Bright ragged loop front with (apparently) structured interior. ---------------------------------------------------------------------------------- 09-Dec-2006: KEYHOLE (26 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** The proton storm still continues, gradually less intense. **** LASCO Data Gap between 05:18 - 08:06 UT (C2 time). **** 14:36 E - Small front that fades close to the inner edge of C3. 19:36 SW - Elongated and ragged loop-like structure. It fades throughout C3. ---------------------------------------------------------------------------------- 10-Dec-2006: KEYHOLE (26 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ **** The proton storm still continues, gradually less intense. **** Otherwise, no significant activity. ---------------------------------------------------------------------------------- 11-Dec-2006: KEYHOLE (26 m) / EIT CCD Bakeout / C2 & C3 improved cadence ************ 02:12 SW - Extremely faint ragged loop-like front gradually developing. 09:12 E - Diffuse and ragged loop front followed by another one at 12:24 UT. They both fade throughout C3. 22:12 NW - Bright loop front. ---------------------------------------------------------------------------------- 12-Dec-2006: End of EIT CCD Bakeout / C2 & C3 improved cadence ************ 13:12 SE - Elongated feature. It fades throughout C3. 20:28 SSW - Faint and diffuse ragged front followed at 21:28 UT by another one, brighter. ---------------------------------------------------------------------------------- 13-Dec-2006: ************ 00:54 SSW - Another ragged front quickly surpassed by the following event. 02:54 S - Very bright and wide loop front all above the S Pole, preceded HALO by a diffuse front that fully surrounds the occulting disk (signal barely above the limb on N, almost at the end of the C2 FOV on the S). An increase of cosmic rays (proton storm) starts to be observed at 03:06 UT; by 03:34 UT the images are almost fully degraded by the ongoing proton storm. The event is first seen in C3 at 03:18 UT, all above the S Pole. The bulk of the CME heads toward S (as projected onto the plane of the sky). The C3 occulting disk is fully surrounded by 03:42 UT. The mean plane-of-sky speed of the LE (as measured at the edge of the brightest part of the LE) at PA ~ 180 deg was ~ 1440 km/sec. If measured at the outermost edge of the event (i.e., that of the diffuse front ahead of the bulk of the CME) the plane-of-sky speed is ~ 1800 km/sec (both determinations based on C2 and only a couple of C3 frames - afterward images too degraded by the ongoing proton storm -). GOES recorded a X3.4 X-ray flare on NOAA AR 10930 (S06W23) between 02:14 - 02:57 UT with peak emission at 02:40 UT. EIT 195 images show a sudden increase in brightness on AR 10930 by 02:24 UT. A rather circular wave (and dimming) with epicenter on the AR mentioned can be seen afterwards quickly covering the full disk. In summary, the event has therefore been determined as a full halo event, frontsided. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20061213 23:48 SW - Ragged front. ---------------------------------------------------------------------------------- 14-Dec-2006: ************ **** Proton storm slowly subsiding. 02:58 ENE - Ragged (elongated) loop front developing gradually. Some gusty outflow along the day. 20:30 WSW - Diffuse ragged front later surpassed by the following event. Also a faint ragged front on WNW. 22:30 WSW - LASCO/EIT observed what would appear to be a very asymmetric Asymmetric Full Halo Event on 2006/12/14-15. The event was first seen in HALO the LASCO C2 FOV on 12/14 at 22:30 UT as a very bright loop front on the WSW Limb with diffuse extensions to N. By 23:30 UT, the bulk of the CME (which heads toward SW as projected onto the plane of the sky) reached the outer edge of the C2 FOV, while the diffuse extensions (on W) are already well past the outer edge. An increase of cosmic rays (proton storm) can be seen by this time. The event is first seen in C3 on 12/14 at 23:42 UT, all above the SW Limb with faint and diffuse extensions to the sides of the bulk of the CME. The mean plane-of-sky speed for the LE of the bulk of the CME at PA ~ 237 was about 970 km/sec. On the other hand, if measured on the LE of the extensions surrounding the bulk of the CME at PA ~ 263, the plane-of-sky speed amount ~ 1220 km/sec (determination based on only a couple of C2 and C3 frames). GOES recorded a X1.5 X-ray flare on NOAA AR 10930 (S06W46) on 12/14 between 21:07 - 22:26 UT with peak emission at 22:15 UT. EIT 195 images show a brightness increase on AR 10930 at 22:00 UT, the brightening becoming strongest at 22:12 UT. A rather circular wave (and dimming) with epicenter on the AR mentioned can be seen afterwards, developing almost all the way to the far Limb (East). By 23:12 UT, a slight increase on cosmic rays can be detected on EIT 195 images. In summary, based on the few LASCO images available the event has therefore been determined as a very asymmetric full halo event, frontsided associated to the X-class event that occurred late on 12/14 on AR 10930. See images and movies of the event at: ftp://ares.nrl.navy.mil/pub/lasco/halo/20061214 ---------------------------------------------------------------------------------- 15-Dec-2006: ************ SW - Aftermath of Event reported to start at 22:30 UT on previous day. Gusty outflow all along the day. 08:30 SW - Ragged front in the gusty outflow. It fades throughout C3. ---------------------------------------------------------------------------------- 16-Dec-2006: ************ SW - Some gusty outflow still on SW. 05:30 WSW - Diffuse front that quickly fades. 11:30 ESE - Very slow (and gradual) development of a system of extremely faint loop fronts. 16:30 WNW - Jet-like front. ---------------------------------------------------------------------------------- 17-Dec-2006: ************ 01:54 NNE - Diffuse jet-like front developing toward NE. 15:30 WSW - Bright ragged loop front. It fades throughout C3. GOES reported a C2.1 X-ray flare on NOAA AR 10930 (S07W89) - with a rather impulsive initial ascending flank - between 14:47 - 18:37 UT with peak emission at 17:11 UT (see also event reported to start at 16:06 UT). 16:06 WSW - Bright loop front with apparently structured interior. Difficult to give an exact time of first appearance due to the superposition in the LOS with previous event. ---------------------------------------------------------------------------------- 18-Dec-2006: ************ WSW - Some gusty outflow. 03:30 NW - Diffuse jet-like front. 03:30 SSE - Diffuse jet-like front. 23:06 E - Small and faint front that quickly fades. ---------------------------------------------------------------------------------- 19-Dec-2006: ************ 03:30 ENE - Slow development of a system of faint ragged loop fronts. Difficult to give an exact time of first appearance. By around 08:30 UT, a system of clearer loop fronts starts to be discerned superposed in the LOS. An apparently twisted structure follows. 08:30 WSW - Thin and elongated feature. It fades throughout C2. 17:30 SW - 'Pair formation': Feature coming out and corresponding one falling. ---------------------------------------------------------------------------------- 20-Dec-2006: ************ 13:31 SE - Diffuse loop front that fades very close to the inner edge of C3. Some gusty outflow on E and ENE. 15:54 NW - Diffuse and elongated loop front. It fades throughout C3. 22:06 SW - Faint and diffuse elongated feature that fades throughout C2. ---------------------------------------------------------------------------------- 21-Dec-2006: ************ 03:08 W - Faint and small front that quickly fades. 21:55 NE - Faint jet-like front. 23:54 SW - Faint and ragged front that fades throughout C2. ---------------------------------------------------------------------------------- 22-Dec-2006: ************ **** No significant activity. ---------------------------------------------------------------------------------- 23-Dec-2006: ************ 08:30 E - A very faint (apparently) twisted structure starts to be discernible. It is difficult to give an exact time of first appearance. It fades throughout C3. 09:32 NNE - Jet-like front. ---------------------------------------------------------------------------------- 24-Dec-2006: ************ 15:30 S - Brightening over the S Pole develops as a wide ragged loop front (almost Partial Halo in the C2 FOV) followed by some faint expanding loop fronts. The wide ragged loop front is first seen in C3 at 17:18 UT developing toward SSE. The angular span of the event in C3 by 20:18 UT is about 100 deg (from about PA 120 to 220). Afterwards, the event gradually fades. By the end of the day it is no longer discernible (LE around midway to the end of the C3 FOV). GOES reported NO X-ray events during the day (X-ray activity below the A-level. 21:30 E - Ragged front that fades close to the inner edge of C3. ---------------------------------------------------------------------------------- 25-Dec-2006: ************ 06:30 E - Not-well-defined front that quickly fades. 08:30 S - Elongated blob-like front followed by some gusty outflow. 19:31 S - Jet-like front. ---------------------------------------------------------------------------------- 26-Dec-2006: ************ 05:54 E - Diffuse and very faint loop-like front that quickly fades. 12:30 NNE - Diffuse and very faint jet-like front. 18:30 SW - Very thin and elongated loop-like front. It fades throughout C2. ---------------------------------------------------------------------------------- 27-Dec-2006: ************ 02:30 E - Faint and not-well-defined front followed at ~ 04:30 UT by another one. The event fades throughout C2. 06:30 NNE - Diffuse jet-like front. **** LASCO Data Gap between 17:30 - 19:31 UT (C2 time). **** ---------------------------------------------------------------------------------- 28-Dec-2006: ************ 00:06 SE - Narrow and diffuse fan-like front that fades throughout C2. 18:54 N - Very narrow loop (jet-like) front develops toward NNW. It fades throughout C2. ---------------------------------------------------------------------------------- 29-Dec-2006: ************ 21:08 W - Bright loop front with structured interior. No X-ray events reported by GOES. ---------------------------------------------------------------------------------- 30-Dec-2006: ************ 03:54 W - Bright ragged loop front in the trail of previous event. Some diffuse and very faint extensions to N. Gusty outflow. No X-ray events reported by GOES associated to the C2 event. 18:30 WSW - Slow development of a system of faint loop fronts partly superposed in the LOS with the trail of previous event. Difficult to give an exact time of first appearance. A twisted structure follows by the end of the day. 20:30 NE - Very narrow loop (jet-like) front that fades throughout C2. ---------------------------------------------------------------------------------- 31-Dec-2006: ************ 20:58 E - Diffuse and very faint elongated loop front. It fades throughout C3. ==================================================================================