LASCO Activity Report for
August 8, 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

Expect abnormal cadence between around 15:00 - 20:00 UT on 08/08, 08/09,
and 08/10 due to instruments (LASCO C2/C2 and EIT) calibration.

2005/08/05 (Friday)

08:54 UT  N East	2-component front: i) a diffuse loop front developing
			toward E, and ii) another one developing as an 
			asymmetric and expanding loop front toward NE, spanning
			up to past the N Pole. An apparent third front shows up
			above the N Pole by 09:06 UT becoming then too faint to
			be followed accurately. Apparently, another one by 
			11:54 UT. The "complex" event is first seen in C3 at
			09:42 UT, above the E - NE limb. Both loop fronts 
			[i) and ii)] are discernible. They develop at apparently
			the same speed. By 10:42 UT an extremely faint signature
			can be guessed above the N Pole. Another one by 16:18 UT
			that develops well past the N Pole up to the NW limb. 
			The mean plane-of-sky speed of the LE of the loop
			described in ii) at PA 054 was ~ 545 km/sec. GOES
			reported a long duration C2.6 X-ray flare on NOAA AR
			10792 (N14W19) between 06:59 - 08:47 UT with peak
			emission at 08:05 UT. It was preceded by a B4.3 X-ray
			flare on NOAA AR 10794 (S14E12), which started at 
			06:14 UT and finish at 06:34 UT, peaking at 06:23 UT. 
			EIT 195 images show a brightening on AR 10792 by 
			07:13 UT followed by a dimming (important) and wave
		 	toward NE. Inspection of running difference images show
			another minor brightenings at: i) 08:48 UT on the east
			side of the AR, and ii) 09:48 UT on its west side. Post
			flare loops. In summary, the event has therefore been
			determined as a frontsided event associated with the 
			long duration C-class flare on AR 10792, that showed up
			in C2 as at least a partial Halo Event. The signal is 
			too faint in C3 in the western hemisphere to establish 
			a clear classification.

2005/08/06 (Saturday)

11:03 UT  E Limb	Very faint and elongated loop front, expanding by 
			14:38 UT.

12:48 UT  W Limb	Diffuse and ragged loop front developing slightly toward
			WSW.

2005/08/07 (Sunday)

03:30 UT  NN West	Very faint ragged front.

06:54 UT  EN East	Extremely faint expanding front. Barely discernible in
			C3.

12:30 UT  N West	Diffuse brighteniong alon streamer precedes the
			development of a bright loop front (first well seen at
			13:31 UT) with apparently twisted inner material. A
			ragged loop front can be seen at 17:30 UT in the 
			trailing material. GOES reported a long duration C1.4
			X-ray flare on NOAA AR 10792 (N08W60) between 11:43 -
			14:10 UT with peak emission at 12:49 UT.

15:06 UT  SS East	Very faint jet-like front.
		

2005/08/08 (Monday)

06:54 UT  S West	Faint, very narrow, and diffuse loop-like front that 
			fades throughout C2.