LASCO Activity Report for
May 23, 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

Medoc Campaign started on May 16. Since then SOHO is in Telemetry submode 5.
EIT 195 CME watch at half resolution (512x512).

2005/05/20 (Friday)

01:27 UT  S Pole	Elongated jet-like front.

02:26 UT  ES East	Small brightening along streamer.

03:26 UT  S Pole	Diffuse jet-like front.

06:50 UT  SS East	Wide and very faint expanding loop front. Difficult
			to give an exact time of first appearance. It fades
			in C3.

19:27 UT  N East	Very slow development of a faint and diffuse front.
			Difficult to precise the time of first appearance.
			An apparently twisted (expanding) structure can be 
			discerned in its interior starting at around 02:00 UT
			on next day.

22:26 UT  W Limb	Initially bright loop front with some trailing material.
			It fades throughout C3.

2005/05/21 (Saturday)

06:26 UT  S West	Couple of faint and relatively wide ragged fronts, one
			developing mainly toward S (expanding loop), and the 
			other toward WSW (brighter than the other one). They
			both fade throughout C3.

10:50 UT  S Pole	Very faint expanding loop front. It fades throughout
			C3.

	07:30 - 12:48 UT 	EIT 304 CME watch 
				(no EIT 195 images during this time)

13:27 UT  S West	Small brightening preceding at 14:06 UT a wide and
			diffuse expanding loop front. Two apparently different
			fronts develops behind and seem to push the leading
			front. The mean plane-of-sky speed of the leading
			front measured at PA 236 was 285 km/sec, showing 
			practically no acceleration. The event spans almost
			120 deg by 20:18 UT (C3 time). No visible signatures
			on EIT 304 images nor EIT 195 that could be associated
			to the LASCO event. GOES reported no X-ray events 
			during the day.

20:06 UT  SS West	Faint and diffuse loop front in the aftermath of
			previous event.

2005/05/22 (Sunday)

Mostly quiet.

20:26 UT  EN East	Kind of 'reconexion event' at PA ~ 71. Another one
			follows at around 22:06 UT. The outgoing counterparts
			of both events fade throughout C3.

2005/05/23 (Monday)

10:50 UT  N West	Extremely faint and diffusee loop front.