LASCO Activity Report for
May 04, 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 to Submode 5 on 2004/04/13 at 16:00 UT 
(SUMER began observing on 2004/04/14). SUMER campaign runs until 2004/06/17.
In other words, LASCO synoptic observation plan cadence remains the same
but the EIT CME watch images will be reduced to half-resolution (512x512)
during that period.

2004/05/03 (Monday)

00:26 UT  S East	Initially bright loop front develops as a 'bubble-like'
			CME. Some gusty outflow follows. EIT Fe XII shows
			the development of a barely backsided event above the 
			SE limb starting at ~ 23:12 UT.

02:06 UT  S West 	Wide and asymmetric loop front develops toward SW in 
			the trail of event reported to start at 19:27 UT on
			previous day. It is difficult to determine the exact 
			time of first appearance. At 03:06 UT, on the S Pole 
			(at the apparent position of the southern leg of the
			asymmetric loop), an elongated loop front develops
			slightly toward SE. The resulting complex event has the
			appearance of a partial halo CME in C3 FOV.
	
04:50 UT  N East	Ragged front superposed with a loop front in the LOS.
			The ragged front develops faster than the loop,
			resulting in a complex feature with structured inner
			part (C2). At ~08:50 UT another ragged loop front
			develops above the E limb. CME signature in EIT Fe XII
			running difference images between 05:48 - 10:24 UT,
			coming out from behind the ENE limb.

16:06 UT  N West	Feature moving out, and a much smaller one falling down. 
			Separation point at ~ 3 solar radii (PA ~ 314).

19:50 UT  W Limb	Extremely faint loop precedes a fast though very faint
			asymmetric loop front, which is clearly visible since
			23:06 UT, already at ~ 1.5 solar radii above the C2
			occulter. By the time, several small ragged fronts to
			S (blob-like), developing toward SW. 

21:50 UT  SS East	Faint ragged loop front. It fades throughout C2.

2004/05/04 (Tuesday)

06:26 UT  N East	'V-shaped' feature. Difficult to give exact time of
			formation. Very faint ragged front to S moving slightly
			faster.

	10:15 - 13:05 UT	Temporary DSN Data Gap.