03:30 UT N Pole In the aftermath of previous halo event, several faint and expanding loop fronts. 06:30 UT W Limb Jet-like front that quickly fade. It is followed at 07:54 UT by a bright and very narrow ragged loop front. 10:30 UT W Limb Similar event to the previous one. A jet-like front that quickly fades preceding at 12:06 UT a brighter feature resembling a very narrow loop front. 12:54 UT EN East Ragged and elongated front. It is preceded at 10:54 UT, on W, by a very faint and diffuse loop front that fades throughout C2. Apparent expanding outflow all around the occulter. GOES reported an M4.0 X-ray flare on NOAA AR 10696 (N08E15) between 11:23 - 11:33 UT with peak emission at 11:30 UT. 14:54 UT W Limb Bright and narrow front that fades throughout C3.
Extremely 01:31 UT N Pole Extremely bright loop front spanning all above the N Pole. Faint extensions can be seen on SW. By 02:06 UT, an apparent new front seems to develop in C2 toward N. C3 images show the complex event starting at 02:18 UT, almost surrounding completely the occultor. However, as in previous events, the signal is barely visible above the S Pole and on SE. After 02:42 UT, C3 images show the development of a diffuser front mainly toward NE (extension on SW apparently associated with this first front) followed by a brighter front spannig ~ 215 deg, from PA 265 - 120 (05:18 UT). By 06:18 UT, the angular span of the event considered as a whole is about 275 deg from PA 205 - 120. The mean plane-of-sky speed of the LE of the outermost front at PA 23 was ~ 960 km/sec (based on C3 data) showing an slight acceleration. And just for reference, the mean plane-of-sky speed of the outermost front at: i) PA 093: 643 km/sec, and ii) PA 256: 550 km/sec. GOES recorded three X-ray flares almost one after another form NOAA AR 10696, by the time at N10E08: - an M9.3 X-ray flare between 00:11 - 00:42 UT with peak emission at 00:34 UT, - an M5.9 X-ray flare between 00:44 - 01:10 UT with peak emission at 00:57 UT, - an M3.6 X-ray flare between 01:40 - 02:08 UT with peak emission at 01:57 UT, On the other hand, EIT 195 images show a brightening on the aforementioned AR starting at ~00:24 UT, and peaking at 00:36 UT. Signatures of a big CME develop afterward with epicenter on the AR are clearly visible. Another brightenings on the same AR can be seen at 01:13 UT, and 01:48 UT. In spite of the weakness of the signal above the S Pole and SE Limb, and from a global point of view, the event as a whole has therefore been determined as a complex partial halo CME, frontsided. However, the symmetry of the event makes it suspicious and one is lead to think whether it was a full halo. Please also keep in mind that in fact a couple of events close in space and time occurred. 05:30 UT N Pole Elongated ragged loop front. 09:06 UT N East Fast elongated fan-like front. It fades throughout C3. 12:30 UT NN West Diffuse ragged loop front that fades throughout C3. 18:54 UT NN West Very faint, elongated and diffuse loop front. 19:31 UT ES East Ragged loop front.
03:30 UT N West Ragged front in gusty outflow. By 06:30 UT, a faint loop front develops, fading later throughout C3. 07:54 UT ES East Faint ragged loop front. 09:30 UT N East Jet-like front that quickly fades. 09:30 UT N West Ragged loop front followed a little bit to S by the very slow development of a system of loops along the streamer. 14:30 UT N West Brigh loop front above the NW Limb, developing superposed in the LOS with the slow evolution of a system of looops along the streamer. By 17:06 UT, the event is completely surpassed by the following 'halo' event. See nect event for more details. 17:06 UT N West Bright and very wide loop front, developing mainly toward WNW, with faint extensions on S that give the appearance of a full halo CME from its very beginning. The halo event is first seen in C3 at 17:18 UT. Please note that the previous front first appeared in C3 at 16:18 UT, being completely surpassed by the halo event at 17:18 UT. During the evolution of the halo event in the C3 FOV, a proton storm develops, becoming stronger by 21:30 UT (C2 time). The mean plane-of-sky speed of the LE of the outermost front at PA 2 was ~ 1770 km/sec (based on C3 data) showing practically no acceleration. If taken into account the LE as the outermost part of the brightest feature (not the outermost one), the mean speed was 1460 km/sec at PA 356. And just for reference, the mean plane-of-sky speed of the outermost front at: i) PA 052: 1180 km/sec, and ii) PA 229: 1100 km/sec. GOES recorded high X-ray activity with several B- and C-class X-ray flares all along the day from NOAA AR 10696. In particular, note the X2.0 X-ray flare from that AR (N09W17) between 15:42 - 16:15 UT with peak emission at 16:06 UT, most likely associated to the Halo event. It is also worth to mention the C7.0 X-ray flare (N08W14) between 13:58 - 14:20 UT with peak emission at 14:07 UT, most likely related to the 'first' event, reported to be seen on NW. On the other hand, EIT 195 images show a brightening on the aforementioned AR starting at ~14:00 UT, followed at 15:12 UT by the apparent ejection of material toward NW. By 16:00 UT, a very strong brightening is seen to occur above the aforementioned AR (signature of the X2.0 X-ray flare) followed by a strong intensity disturbance travelling across the disk with epicenter in that AR (the disturbance is stronger toward N). For completeness, please note that the C3 images show, starting at about 21:18 UT, signatures of what it could be considered as an apparent much fainter and ragged halo in the aftermath of the previous big halo event. In summary, the event as a whole has therefore been determined as a 'full' halo CME, frontsided. But please keep in mind that in fact a couple of events close in space and time occurred. 22:30 UT N west 'Explosive' ragged front.
04:06 UT HALO ....