00:30 UT NW Extremely faint and diffuse front surrounding almost the C2 occultor. SEE description of event reported to start at 00:40 UT. 00:30 UT WSW Bright ragged feature. SEE description of event reported to start at 00:40 UT. 00:40 UT SE Almost circular front develops as a 'full' halo CME. The 'halo' (HALO) event (hereafter Event #1) was first observed in C2 above the SE Limb extending up to the SW Limb. Please note that already by 00:30 UT an extremely faint and diffuse front is also seen surrounding almost completely the C2 occultor. Closer inspection of the development of this faint front shows that what at first glance seemed only one front are in fact two: one moving out mainly toward NW (Event #2), and another one developing mainly toward SE (Event #3). Starting also at 00:30 UT a ragged feature (brighter than the other features described above) develops toward WSW - SW (Event #4), which is followed at 03:06 by a twisted feature. Also at that time, an elongated ragged feature can be seen developing toward NE (Event #5).The five events are first seen in C3 by 01:42 UT: Event #1 just barely seen above the SW Limb, Event #2 (on NW) and #3 (on SE) further out, Event #4 above the WSW Limb as a bright ragged feature, and Event #5 just above the NE Limb. For reference, the mean plane-of-sky speed for the LE of the different events is shown below (based on C3 data): Event #1: PA 128 --> 412 km/sec (practically no acceleration) Event #2: PA 291 --> 484 km/sec (very diffuse LE) Event #3: PA 086 --> 599 km/sec (very diffuse LE) Event #4: PA 241 --> 388 km/sec (practically no acceleration) Event #5: too difficult to track it accurately, but its speed is in the 350-450 km/sec range. GOES did not record any significant X-ray activity by the time. On the other hand, EIT Fe XII images show the lift-off of a filament located around equatorial latitudes, past half way to the W Limb, starting at around 18:00 UT. This signature is likely to be the EIT counterpart of either what we called Event #4 or the twisted feature coming behind. Other than that, there is no other visible signature on the disk that could be related to the other events mentioned above. By the time of writing is not clear whether Events #2 and #3 are related to any of the other two events or are monster of a diferent nature. As for Event #1, it has therefore been determined as a 'full' HALO CME, backsided. 10:30 UT HALO Very faint and diffuse circular front in the northern hemisphere, brighter above the ENE Limb. By 10:54 UT the C2 occultor is completely surrounded. By that time, a brighter front begins to be visible above the E Limb up to the S Pole. Inspection of the C2 running difference movie shows an almost perfect circular front inside the diffuse circular front described at the beginning. The C3 occultor is completely surrounded by this second feature at 11:42 UT. For reference, the mean plane-of-sky speed for the LE of the various features is given below (based on C3 data): - LE of the diffuse circular front at PA 120: 692 km/sec (practically no acceleration) - LE of the second circular front at PA 115: 517 km/sec (practically no acceleration) GOES did not record any significant X-ray activity by the time. Likewise, EIT Fe XII images do not show any signature that could be related to the Halo event. The event has therefore been determined as a 'full' halo CME, backsided. 18:30 UT WSW Faint ragged loop front that fades throughout C3. 19:31 UT WNW Small and bright loop front followed by a diffuse front slightly to N moving apparently faster. They fade througout C3. 19:54 UT ENE Very faint and not well defined front. It fades throughout C3. Gusty outflow before and after.
02:06 UT W Bright and elongated loop front. It fades throughout C3. 06:54 UT E Bright loop front. By 07:31 UT a wide and bright loop front (HALO) can be seen developing mainly toward E accompanied by a much fainter and diffuse loop front extending all above the N Pole. By 08:06 UT the C2 occultor is completely covered (with very faint extensions above the SW Limb). Please note that by 08:30 UT, above the NE Limb, an apparently flat ragged front is discernible superposed in the LOS with our event. On the other hand, features corresponding to the halo event are first seen in C3 at 07:42 UT above the E - ESE Limb, exhibiting a diffuse front ahead of a bright loop front. The C3 occultor is covered by 08:42 UT. For reference, the mean plane-of-sky speed for the LE of various features is given below (based on C3 data): - LE of the diffuse front at PA 112: 970 km/sec - LE of the bright loop front at PA 112: 850 km/sec - LE of the outermost feature at PA 295: 457 km/sec GOES did not record any significant X-ray activity by the time. EIT Fe XII images show a CME signature that develops above the E Limb, starting at around 07:36 UT. Such an ejection seems to be rooted with one leg on the visible side and the other one behind the limb. It is most likely the EIT counterpart of the 'flat' front mentioned above. As for the halo event, there is no visible signature on the Earthside of the Sun as seen on EIT Fe XII images that could be associated. The event has therefore been determined as an asymmetric 'full' halo CME, backsided. 09:54 UT E Very ragged loop front. It fades throughout C3. Gusty outflow. Infalling material on SE along the rest of the day. 18:30 UT W Very faint spray-like front.
05:30 UT E Limb Faint ragged loop front that fades close to the inner edge of C3. 06:30 UT N West Big bright loop front. EIT Fe XII running difference images show CME signature from nearby N20W60 travelling toward NW starting at around 05:24 UT. Apparent dimming centered on source. 06:54 UT S Pole Very faint asymmetric loop front developing slowly. It fades throughout C3. 07:54 UT E Limb Wide and bright loop front with structured interior. It is followed at 12:54 UT by a small and relatively bright front. By 07:25 UT EIT Fe XII running difference images show an apparently backsided CME above the E Limb. No significant X-ray activity reported by GOES. 18:54 UT E Limb Another wide and bright loop front with structured interior. Starting at 18:24 UT EIT Fe XII running difference images show an apparently backsided CME above the E Limb. No significant X-ray activity reported by GOES. 20:58 UT E Limb Another wide and bright loop front moving apparently faster than the one at 18:54 UT. Difficult to give an exact time of first appearance due to the superposition of events in the LOS. By 23:42 UT the first front is apparently surpassed in the C3 FOV by this second front. Close inspection of the C2-C3 sequence of images seems to reveal a third front (even more explosive) starting also at around 20:58 UT and developing slightly toward ESE. By 00:18 UT a faint halo seems to develop in C3. Nothing sifnificant in Fe XII running difference images on the disk. Most likely, the source for the 3 events was in the backside as for the event at 18:54 UT. Likewise, no significant X-ray activity was reported by GOES by the time. Gusty outflow well into next day.
05:54 UT ES East Ragged loop front. It is preceded by several small ragged front on E, and also afterward (intermitent activity). 16:30 UT S East Slow development of a system of asymmetric loops that spans later all above the S Pole. Continuous development of loops well into next day. As time goes by, the main direction of the flow seems to rotate toward W, like following the Sun's rotation.
15:30 UT E Limb Bright and wide loop front with structured interior and trailing material. By 16:54 UT an apparent different structure seems to develop inside the previos CME and spanning up to above the S Pole. EIT Fe XII running difference images show a big backsided above the E Limb starting at around 14:00 UT. Please note that between 15:24 - 16:12 UT an intensity disturbance is seen travelling all above the SW Limb (maybe related to the second feature seen in C2 FOV?).