LASCO Activity Report for
June 16, 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

LASCO C2 and C3 will be in high cadence during the rest of the week: 
C2 at a 12 minute cadence, C3 at the 30 minute cadence.

EIT 195 CME watch was interrupted on 2004/06/15 (Tuesday) at 15:00 UT
for EIT CCD bakeout calibrations. EIT CCD bakeout started on 2004/06/15 
at ~ 20:00 UT. EIT CCD bakeout until 2004/07/04 (Sunday).

MERCURY entered the C3 FOV (from the right) on 2004/06/12 (Saturday).

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.

2004/06/15 (Tuesday)

02:26 UT  N East	Diffuse front ahead of bright loop front with twisted
			inner part. EIT Fe XII running difference images show
			signatures of the development of a limb event starting
			early in the day.

07:50 UT  S West	Bright loop front with twisted inner part. EIT Fe XII
			running difference images show a CME signature starting,
			apparently just behind the SW Limb, at 05:48 UT.

08:26 UT  N East	Ragged front developing superimposed in the LOS with 
			event reported to start at 02:26 UT. Difficult to
			give an exact time of first appearance. It is also
			difficult to discern if it is part of the event at 
			02:26 UT or an event coming from a different source.

20:16 UT  N West	Wide loop front with structured interior, preceded at 
			~ 16:57 UT by an elongated and apparently twisted 
			feature. The latter fades in C3, but before fading 
			seems to be surpassed by the loop. By 00:00 UT on next
			day an apparently different undefined front, fairly 
			faint, develops superposed in the LOS.

21:12 UT  NN East	Diffuse ragged loop front followed at 22:12 UT by an 
			initially brighter ragged front. It becomes then
			difficult to distinguish one from another in the C3 FOV.

2004/06/16 (Wednesday)

	
04:36 UT  E Limb	Bright loop front with trailing material.

	07:00 UT - Present	Temporary Data Gap.

	16:40 - 22:15 UT	Temporary DSN Data Gap.