On 2005/07/06, SOHO Telemetry Submode was changed to Submode 5 (support for VAULT -Sounding Rocket Launch on 2005/07/07). Telemetry Submode will be changed back to Submode 6 on 2005/07/08 at 15:00 UT. During TM Submode 5, EIT 195 CME watch in half-res (512x512).
07:27 UT N East Elongated loop front developing toward ENE. 07:27 UT ES East Slow development of a system of faint loops. Difficult to give an exact time of first appearance. 12:26 UT E Limb Faint front developing slightly toward ESE (partly superposed with the development of the system of faint loops). It fades close to the inner edge of C3. 17:31 UT N Pole Extremely faint and diffuse front. Next C2 image available (19:22 UT) shows a very faint expanding system of loop-like fronts developing mainly toward N. A bright ragged front is also developing toward W, which does not form part of the partial halo under analysis (se below). The partial halo event was first seen in C3 at 19:42 UT above the N Pole. By 00:18 UT (on 07/09) the event spans ~ 150 deg, from around PA 280 - 070. It is difficult to precise the limit on W, as the faint halo event superposes there in the LOS with the brighter limb event described above (see also below). The mean plane-of-sky speed of the LE of the partial halo event at PA ~ 3 was ~ 461 km/sec (based only on the first four C3 frames, as the LE becomes then barely discernible). GOES reported a long duration C1.6 X-ray event on NOAA AR 10786 (N13W11) between 15:40 - 17:19 UT with peak emission at 16:18 UT. EIT 195 images show the development of a dimming region to N of the AR 10786, starting at around 16:12 UT. Please note that the Telemetry Submode changed from Submode 5 to 6 by 15:00 UT and therefore the EIT 195 CME watch changed from half-res (512x512) to full-res (1024x1024) by that time. Note that by 17:15 UT, a barely backsided CME starts to be seen developing above the WSW Limb. This signature likely corresponds to the EIT counterpart of the ragged front seen in C2/C3 images developing toward W mentioned above. In summary, the event has therefore been determined as a very faint partial halo CME, frontsided, associated with a long duration C1.6 X-ray flare on NOAA AR 10786. 19:22 UT W Limb Bright ragged loop front. Some infalling material (see previous event for some other details).
02:30 UT NN East Extremely faint expanding loop front. It fades close to the inner edge of C3. 09:06 UT E Limb Small front. 13:31 UT S East Expanding 'half' loop fronts. They fade throughout C3. 13:31 UT W Limb Narrow and elongated front. It fades throughout C3. 21:54 UT EN East Bright loop-like front followed by a cavity and bright inner core. See next event for some other details on this event. 22:30 UT N West Wide and ragged loop front front. Faint and diffuse extensions all above both poles can also be discerned. By 23:06 UT, the C2 occulting disk is already completely covered. Note that the development of a typical 3-part structure CME can be seen on ENE since 21:54 UT (previous entry). Signatures of the halo event were first seen in C3 at 23:18 UT all above the W Limb. A very faint and diffuse front can be seen ahead (shock?) spanning all above the N Pole. The C3 occulting disk is completely covered by 23:42 UT. The mean plane-of-sky speed of the LE of the halo CME (where the intensity gradient is maximum) at PA ~ 306 is around 1140 km/sec, showing practically no acceleration (based on C3 data). GOES reported an M2.8 X-ray flare on NOAA AR 10786 (N12W28) between 21:47 - 22:19 UT with peak emission at 22:06 UT. Note also the occurrence of a C1.5 X-ray flare on NOAA AR 10789 (N17E15) between 20:23 - 21:01 UT with peak emission at 20:45 UT preceded by a B5.8 X-ray flare on the same AR 10789 that peaked at 19:38 UT. EIT 195 images show a small brightening on AR 10789 starting at 20:36 UT with the formation of a dimming region toward NE of the AR afterward. The eruption of at least part of a filament on NE can be seen more or less coincident with the development of the dimming. The EIT events just described are most likely related to the X-ray activity reported by GOES on NOAA AR 10789 (and seem to be the EIT counterpart of the 3-part structure CME seen by the LASCO coronagraphs). Later, at 22:00 UT, a strong brightening can be seen on AR 10786 followed by the formation of a dimming toward NW, N, and NE of the AR. Corresponding running difference EIT 195 images show a strong intensity disturbance developing radially away of the AR, mainly toward N. The bulk of the material ejected seems to develop mainly toward NW. These EIT events are related to the M2.8 X-ray flare on AR 10786. In summary, the event has therefore been determined as an asymmetric full halo event, frontsided, associated with an M2.8 X-ray flare on NOAA AR 10786.
06:06 UT W Limb Diffuse front. Developing missed in following data gap. 06:54 - 20:58 UT Temporary Data Gap. NOTE: GOES reported a C9.9 X-ray flare on NOAA AR 10783 (N00W90) between 15:08 - 15:20 UT with peak emission at 15:16 UT. 23:06 UT W Limb Bright loop front with twisted inner structure. Much gusty outflow afterward.
00:30 UT W Limb Just after the event reported to start at 23:06 UT, an apparently new bright and ragged front appears. 05:30 UT WN West Initially bright and relatively small loop front. 06:54 UT W Limb Initially bright and relatively small loop front that quickly fades. Gusty outflow continues on W. 13:54 UT WN West Another initially bright and relatively small loop front. Time of the last C2 image analyzed: 16:30 UT.