LASCO Activity Report for
December 03, 2004 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

SOHO Telemetry Submode changed back to Submode 5 on 2004/12/01 @ ~ 19:00 UT.
EIT 195 CME watch at half resolution (512x512) since then.

After the EIT Shutterles Campaign and while in Submode 6, EIT 195 CME 
watch at full resolution (1024x1024).

SOHO Telemetry Submode changed to Submode 6 at 14:00 UT on 2004/11/30 
(EIT Shutterless Campaign between 17:00 - 19:40 UT). It will be back 
to Submode 5 on 2004/12/01 at 19:00 UT.

SOHO is in Telemetry Submode 5 since 2004/11/08 @ 22:15 UT. While in 
Submode 5, half resolution EIT 195 CME watch (512x512).

2004/12/02 (Thursday)

01:27 UT  EN West	Faint ragged front accompanied to N by a narrow front
			moving apparently a little bit faster. By 02:50 UT, on
			NNW, a couple of blob-like fronts start to be discerned.
			They all fade throughout C3. Gusty outflow follows on
			NNW in the form of small blobs.

07:50 UT  N Pole	Very faint and raged front developing slightly toward
			NNE. It fades throughout C3. By 08:50 UT a very narrow
			loop-like feature (jet-like) is seen at roughly the PA 
			of its southern leg. And by 09:26 UT another faint and
			ragged loop front can be seen above the N Pole.
		

2004/12/03 (Friday)

00:26 UT  HALO		The event is first seen in C2 at 00:26 UT already
			surrounding the occulting disk. In particular, a 
			brighter feature can be discerned developing above the
			N Pole - NE with faint extensions extending a little
			further out, and all the way through the western
			hemisphere, S Pole (most faint), and eastern hemisphere.
			The event is first seen in C3, all above the N Pole by
			00:42 UT. The event looks extremely faint in the S - SE
			region of the C3 FOV during the whole development. The
			mean plane-of-sky speed of the LE of the outermost 
			layers of the event at several PA is given below (based
			on C3 data, all cases showing practically no
			acceleration): PA 002: 937 km/sec; PA 076: 1074 km/sec;
			PA 267; 773 km/sec; PA 326: 1150 km/sec. GOES reported 
			an M1.5 X-ray flare on NOAA AR 10708 (N08W02) between
	 		23:44 (on Dec.02) - 00:35 UT with peak emission at 
			00:06 UT, which was clearly associated with the 
			coronagraph event. EIT 195 images show a strong
			brightening on NOAA AR 10708 just starting at 23:48 UT
			(on Dec.02), followed by a rather circular intensity
			disturbance traveling away from the AR, and a relative
			large dimming region on NW of the AR (and also to E).
			Nice post-flare loops. A filament previously 'winding' 
			through the region cannot be seen any longer. In 
			summary, the event has therefore been determined as a
			'full' halo CME event, frontsided.