LASCO Activity Report for
April 15, 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).

2004/04/14

00:26 UT  N East	Slow development of system of loops along the streamer.
			Difficult to give an exact time of first appearance.
			By ~ 07:27 UT a very asymmetric loop front starts
			developing first distinguished along the streamer 
			(though the starting time is again very difficult to
			determine). By 11:50 UT is clearly seen, one leg along
			the streamer on NE (front already at the end of C2 FOV), 
			the other on the NW limb. The north eastern part
			exits C3 FOV by 23:18 UT. Backsided event.

01:27 UT  S East	Asymetric ragged loop front, at PA that matches that of 
			the leg on SSE of the wide ragged loop front reported to
			start at 21:26 UT on previous day. It is preceded by a
			similar front (though smaller) at ~22:26 UT on previous
			day. Twisted trailing material.

05:26 UT  S East	Spray-like front slightly to N of previous event.

16:26 UT  S West	Relatively bright small feature along streamer.

18:26 UT  E Limb	Spray-like front developing toward SE. Barely visible
			in C3, only close to the inner edge.

20:26 UT  S Pole	Narrow spray ragged front developing slightly toward SE.
			It fades throughout C2.

21:26 UT  N West	Elongated ragged loop front at PA that matches that of
			the leg on NW of the big asymetric loop that was 
			reported to start developing at ~07:27 UT. 
 
22:26 UT  S West	Bright ragged fan-like front. It fades throughout C3.

23:06 UT  N East	Ragged loop front at PA that matches that of the leg 
			on NE of the big asymetric loop that was reported to
			start developing at ~07:27 UT. Gusty outflow well into
			next day.

2004/04/15

03:26 UT  S West	Spray-like front.

08:06 UT  S West	Bright narrow ragged front along streamer, slightly to 
			S of previous event.

08:06 UT  N West	Loop front that quickly fades. At 08:26 UT a bright 
			ragged front appears at the PA of the northern leg of 
			the loop, moving much faster.