LASCO Activity Report for
April 09, 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

2004/04/08

02:06 UT  W Limb	Wide and initially bright ragged loop front (spanning 
			by 04:06 UT ~ 100 deg from PA 225 to PA 325).

02:54 UT  E Limb	Spray-like front developing slightly toward NE followed 
			at 03:54 UT by an asymmetric ragged loop front. They 
			fade close to the inner edge of C3. At  04:06 UT a 
			ragged loop front starts developing at PA coincident 
			with that of the northern leg of the spray fronts.

04:30 UT  N East 	Extremely narrow ragged front (jet-like). IT fades
			throughout C2 

06:30 UT  W Limb	Bright ragged loop front.
			
10:30 UT  HALO		Bright loop front in the SSE; by 11:06 UT the front
			develops into a full halo CME, though much fainter in 
			the northern hemisphere. The front first appeared in C3
			images at 10:42 UT, though just slightly visible above
			the occultor. Full coverage of the C3 occulting disk
			occurs by 12:18 UT. The  mean plane-of-sky speed at 
			PA 197 was 915 km/s (based only in C3 data) showing a
			slight deceleration. The event is related to a C7.4 
			X-ray flare that GOES records from AR 0588 (by the 
			time at S15W11) between 09:53 - 10:47 UT with peak
			emission at 10:19 UT. Signatures of the event in EIT Fe
			XII running difference images between approximately 
			09:48 and 12:48 UT

11:30 UT  W Limb	Another bright ragged loop front.

13:31 UT  S West	Another bright loop front develops at roughly the same
			PA where the halo event first appeared in C2. This 
			event is likely related to a C1.3 X-ray flare registered
			by GOES, that occurred on the same AR between 13:05 and
			13:35 UT with peak emission at 13:20 UT. The flare was
			also well imaged by EIT in Fe XII starting at around 
			13:13 UT.

18:54 UT  W Limb	Ragged front that fades throughout C2. A narrow and
			faster front develops at PA coincident with that of 
			the southern leg of the ragged front, shaped as a 
			narrow loop in C3 FOV, where finally fades. 

20:06 UT  E Limb	Ragged loop front developing slightly toward SE. It
			fades close to the inner edge of C3 FOV.

2004/04/09

00:30 UT  W Limb	Ragged front that quickly fades.

04:30 UT  N East	Ragged asymmetric loop front.

	06:05 - 11:25 UT	Temporary DSN Data Gap.