LASCO Activity Report for
December 5, 2005 SOHO Science Daily Meeting

Event times are first frame seen in C2 camera unless otherwise noted.
These are preliminary observations for the daily SOHO science discussions.
Final analysis is reported on the Lasco CME list.
An archive of these reports is available.

Points Of Interest

KEYHOLE Operations:
   Dec 3 - Dec 20 (26 m)
   Dec 6 - Dec 17 (34 m)

EIT CCD bakeout (+ pre and post cal) between 
Dec 2 ~ 18:12 UT - Dec 18 21:00 UT. 

2005/12/02 (Friday)

NOTE:
----
Several C- and M-class X-ray flares on NOAA AR 10826 during the day. In particular:

- Impulsive C1.7 (S04E17), peak at 00:34 UT
- Impulsive C1.3 (S04E17), peak at 02:11 UT
- M6.5 (S03E19) between 02:42 - 03:00 UT, peak at 02:52 UT
- C4.9 (S02E14) between 05:52 - 06:09 UT, peak at 06:00 UT
- M7.8 (S03E14) between 10:05 - 10:25 UT, peak at 10:12 UT
- M1.0 (S03E07) between 20:01 - 20:52 UT, peak at 20:30 UT
- M2.0 (~S02E08) between 20:57 - 21:37 UT, peak at 21:19 UT

Some LASCO events may be associated to some of them.


01:31 UT  E Limb	Big and bright ragged loop front with trailing material.
			EIT 195 images show a CME either at or just over the 
			ENE Limb between 00:48 - 02:36 UT.

04:54 UT  ES East	Elongated and relatively narrow loop front.

07:31 UT  ES East	Diffuse brightening just appearing develops as a bright
			loop front (much brighter to S). Faint loop-like
			extensions to S (not discernible in C3). By 07:54 UT,
			a ragged and apparently asymmetric loop front develops 
			on the E limb, at a position that seems to match that 
			of the apparent northern leg of the bright loop front. 
			
11:06 UT  SS West	Very faint and diffuse (wide) loop front, spanning
			up to almost the W Limb. Apparently not discernible 
			on C3.

11:30 UT  N East	Elongated (and not-well-defined) loop front along 
			the streamer.It was preceded at 08:06 UT by a similar
			front, though in this case it is difficult to discern
			whether it was part of previous event or an independent
			feature.
			
15:30 UT  ES East	Elongated (fan-like) loop front. It fades throughout C3.

16:06 UT  E Limb	Ragged blob-like front starts to be discerned slightly
			above the C2 occulting disk.

2005/12/03 (Saturday)

NOTE:
----
Multiple B- and C-class X-ray activity continues on NOAA AR 10826 (AR close or 
around the central meridian).

01:24 UT  ES East	Elongated loop front with faint loop-like extensions
			to S. It fades throughout C3. System of faint loops
			starts to develop on E by 02:12 UT, fading then
			throughout C2.

09:00 UT  S East	Slow development of a system of faint expanding loop
			fronts. It fades throughout C3.

16:48 UT  W Limb	Diffuse brightening precedes the slow development of
			a system of faint loops. Apparently another structure,
			twisted, develops by 19:12 UT (though it is difficult 
			to give an exact time of first appearance) superposed
			in the LOS. It seems to move faster.

20:24 UT  ES East	Narrow loop front. Very faint expanding loop-like
			extensions develop to S. They superpose in the LOS with
			the still evolving slow event reported to start at 
			09:00 UT.

2005/12/04 (Sunday)

NOTE:
----
Multiple B-class X-ray activity continues on NOAA AR 10826.

01:24 UT  WS West	Elongated loop front slightly curved toward S. It fades
			throughout C3.

11:24 UT  S East	Very faint loop front with fainter extensions to S.

19:12 UT  S East	Very faint expanding loop front. It fades throughout C3.

2005/12/05 (Monday)

See Report on Dec 9, 2005.