03:54 UT EN East Jet-like front. 04:54 UT EN East Very bright and wide ragged loop front. Faint and diffuse extensions to N and S. As it happened with previous event, faint extensions can be seen past the N Pole up to the W Limb by 05:30 UT. An extremely weak signal can be seen on SW by 06:30 UT. Signatures of the event in the western hemisphere are practically non-discernible in C3. The mean plane-of sky speed of the ragged LE at ~ PA 85 was ~ 1290 km/sec, showing practically no acceleration. Again, EIT 195 images do not show significant activity on the disk by the time of the event. But it does show a backsided CME above the ENE limb starting by 04:24 UT. 09:30 UT E Limb Bright loop front just appearing develops as a very bright ragged and wide loop front with faint and diffuse extensions to N and S. By 09:54 UT, the LE on E is already past the outer edge of the C2 FOV. The brightest structure develops toward ESE. The event is first seen in C3 at 09:42 UT, just appearing above the E Limb. By 10:19 UT, faint extension surround the main structure, on S well past the S Pole. The angular extent of the event at 11:42 UT is about 230 deg (from PA 005 - 235), extremely faint on SW. Note that the last C3 image where the event can be seen is at 14:18 UT (there is afterward a gap between 15:00 - 17:00 UT due to the especial PBs images for the Faraday Rotation Study still under way). The mean plane-of-sky speed of the ragged LE at PA 082 was ~1800 km/sec (based on only the first 3 C3 frames were the event is seen, as the LE becomes then too faint and diffuse for accurate measurements). EIT 195 images do not show significant activity on the disk that could be related to the event by the time of the event. However, it does show signatures of an important (and still backsided) CME above the E Limb, first clearly seen at 09:24 UT. In summary, the event has therefore been classified as at least a Partial Halo event, backsided. 15:00 - 17:00 UT No LASCO C2/C3 CME watch images. High Cadence C3 PBs subfield images for the Faraday Rotation Study with Cassini Campaign. 17:06 UT E Limb Asymmetric loop front already under way after gap. 17:06 UT WN West Big twisted structure already under way after gap (LE past the outer edge of the C2 FOV). 23:30 UT EN East In the gusty outflow, a small ragged front becomes discernible.
01:31 UT WN West Bright and elongated ragged loop front. EIT 195 images show signatures of a backsided CME above the ENE limb (developing toward NW) starting at 01:13 UT. 04:54 UT E Limb Bright loop front. Faint and diffuse extensions to N and S can be seen by 05:08 UT. By 06:06 UT, the C2 occulting disk appears fully covered (by that time, the LE on E is already well past the outer edge of C2). Prominence material follows the outer front on ENE. Note that by 07:54 UT, a new bright loop-like front follows behind the trail of the prominence. The event is first seen in C3 at 05:18 UT as a very bright loop front on E, with faint and diffuse extensions to N and S. By 06:18 UT, the C3 occulting disk seems to be fully surrounded by these faint extensions (though they are very faint on the western hemisphere). The diffuse structures on west that made the C2 occulting disk to appear covered by 06:06 UT, are first seen in C3 by 07:42 UT on W and SW. The mean plane-of-sky speed of the LE of the outermost front at PA ~ 83 was ~ 1960 km/sec, showing practically no acceleration (based on C3 data). GOES reported an M3.7 X-ray flare on N11E90 between 04:33 - 05:30 UT with peak emission at 05:02 UT. The source region is still behind the limb and is apparently located in the position of the old NOAA AR 10786. EIT 195 images show the slow and gradual increase of a system of loops barely anchored behind the limb starting at around 03:48 UT, with a sudden brightening increase at 04:36 UT, just on the ENE limb. By 04:48 UT, the images show release of prominence material, jointly with a strong intensity disturbance all above the eastern limb. A slight intensity disturbance can be seen on the eastern part of the disk afterward. Post- plare loops can also be seen developing just above the limb. By 07:13 UT, another CME signature develops above the ENE Limb (also barely backsided). In summary, the event has therefore been determined as a strong limb event (barely backsided), with an associated shock that made the event to look like an asymmetric full halo event. The event was associated with an M3.7 X-ray flare on the apparently old location of the former NOAA AR 10786 (barely behind the ENE limb). The location of this active region makes the arrival of a CME- produced interplanetary disturbance to the Earth unlikely. 07:54 UT EN East In the trailing material of previous event, a new bright and ragged loop-like front can be seen. EIT 195 images show by 07:13 UT a CME signature developing above the ENE Limb (barely backsided). 11:06 UT EN East Small and bright ragged front in the southern part of the trailing material of previous event. GOES reported a C1.7 X-ray flare on N14E88 between 10:31 - 11:30 UT with peak emission at 10:55 UT. Time of the last C2 image under analyis: 12:30 UT.