LASCO Activity Report for
February 17, 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

2005/02/16 (Wednesday)

04:30 UT  E Limb	Elongated and diffuse faint loop-like structure. It is
			followed at 06:54 and 08:06 UT by a couple of similar
			fronts, all of them developing slightly toward ENE.
			They all fade very close to the inner edge of C3.

06:54 UT  S West	System of faint and diffuse expanding loop fronts.
			New loop fronts continuously develop all along the 
			day. They all fade throughout C3.

	14:00 - 16:40 UT 	EIT Shutterless Run in 304 A.
				Only about one C2 image/hour during the run.

2005/02/17 (Thursday)

00:06 UT  WN West	Diffuse loop front surrounded by a very faint front 
	 Asymmetric 	develops as an asymmetric Full Halo CME. The C2
	    HALO	occulting disk is completely surrounded by 00:54 UT 
			(though the signatures are very faint on E). The event 
			is first seen in C3 at 00:42 UT above the W Limb. By
			02:42 UT the C3 occulting disk seems to be completely
			covered (as in C2, the halo is barely visible on E). 
			GOES reported a C4.9 X-ray flare on NOAA AR 10734
			(S03W24) on 2005/02/16 between 23:29 - 23:53 UT with 
			peak emission at 23:38 UT. The flare occurs just after
			a B4.7 X-ray-flare on NOAA AR 10735 (S10W03) also at 
			the of previous day between 23:03 - 23:19 UT with peak
			emission at 23:15 UT. EIT 195 running difference
			images show a relatively strong brightening on AR 
			at 23:36 UT. An extremely faint intensity disturbance
			can be guessed afterward developing mainly toward NW 
			of the AR. The event has therefore been determined
			as a faint asymmetric full halo CME, frontsided.
	
05:54 UT  E Limb	Extremely narrow loop-like feature developing slightly
			toward ENE. It fades throughout C2.

09:06 UT  W Limb	Faint and diffuse loop front. By 10:30 UT a small 
			blob-like front becomes discernible on SW.

09:30 UT  S East	Faint and ragged loop front along streamer.