LASCO Activity Report for
November 05, 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

2004/11/04 (Thursday)

	
00:30 UT  N Pole	Faint and big expanding loop front.

04:06 UT  S West	Ragged loop front that fades in C3.
	
09:54 UT  N East	Bright loop front with a faint and diffuse extension 
			all above the NW, W, and NW Limbs. The event was first
			seen on C3 at 10:42 UT above the NE Limb, developing 
			mainly toward NE. The extensions continue very clear 
			all around the N Pole, NW, W, and SW Limbs. Nothing 
			can be distinguished above the SE Limb. By 13:42 UT, 
			the event (excess brightness) spans in C3 ~ 280 deg
			from PA 180 - 100. The mean plane-of-sky speed of the 
			LE of the front at PA 31 was ~ 635 km/sec (based on 
			C3 data) showing practically no acceleration.
			GOES reported an C6.3 X-ray flare on NOAA AR 10696
			(N09E28) between 08:45 - 10:04 with peak emission at
			09:05 UT, most likely asssociated to the event described
			above. On the other hand, EIT 195 images show a
			brightening on the aforementioned AR at 09:00 UT, with
 			signatures of a CME developing mainly towards NE. But
			please note that since around 07:13 UT excess activity
			begins to be seen on that AR. GOES reported also a C1.0
			X-ray flare on NOAA AR 10696 (N09E28) between 07:23 -
			07:28 UT with peak emission at 07:26 UT.
			In summary and based on its appearance in the C3 FOV, 
			the event has therefore been determined as a partial 
			halo CME, frontsided.

16:30 UT  ES East	Faint and elongated expanding loop front.

23:30 UT  N East	Extremely bright loop front spanning all above the 
			N Pole. By 00:30 UT on next day, fainter extensions can
			be seen all around the western hemisphere. The event 
			was first seen on C3 at 23:42 UT just appearing above 
			the NE Limb, and developing mainly toward NE. The events
			looks much brighter than the previous reported one. 
			Even though, nothing can be distinguished above the SE
			Limb. Close inspection of C3 images show apparently
			another front coming behind the first front. This first
			front seems to develop mainly toward NE while the second
			one seems to be the one that continues all around the
			western hemisphere. The whole event spans in C3 about 
			290 deg (by 02:42 on 2004/11/05) from PA 180 - 110. 
			The mean plane-of-sky speed of the LE of the outermost
			front at PA 27 was ~ 1053 km/sec (based on C3 data) 
			and showing practically no acceleration.
			GOES reported an M2.5 X-ray flare on NOAA AR 10696
		 	(N11E19) between 21:42 - 22:53 UT with peak emission at
			22:29 UT, most likely associated to the first front; 
			and an M5.4 X-ray flare on the same AR (N08E18) between
			22:53 - 23:26 UT with peak emission at 23:09 UT, most
			likely asssociated to the second front. On the other
			hand, EIT 195 images show a brightening on the
			aforementioned AR at ~22:00 UT, with signatures of a 
			CME developing mainly towards NE. A strong wave-like
			intensity disturbance can be distinguished developing
			mainly toward N, NW, and W. By 23:12 UT another strong
			brightening can be seen on the aforementioned AR
			developing afterward with similar morphological
			characteristics as before.
			In summary, and from a global point of view, the event 
			as a whole has therefore been determined as a complex
			partial halo CME, frontsided. But please keep in mind
			that in fact two events close in space and time occurred.

2004/11/05 (Friday)

	
03:30 UT  N Pole	In the aftermath of previous halo event, several 
			faint and expanding loop fronts.
 
06:30 UT  W Limb	Jet-like front that quickly fade. It is followed at 
			07:54 UT by a bright and very narrow ragged loop front.

10:30 UT  W Limb	Similar event to the previous one. A jet-like front that
			quickly fades preceding at 12:06 UT a brighter feature
			resembling a very narrow loop front.

12:54 UT  EN East	Ragged and elongated front. It is preceded at 10:54 UT,
			on W, by a very faint and diffuse loop front that fades 
			throughout C2. Apparent expanding outflow all around
			the occulter. GOES reported an M4.0 X-ray flare on 
			NOAA AR 10696 (N08E15) between 11:23 - 11:33 UT with 
			peak emission at 11:30 UT.

14:54 UT  W Limb	Bright and narrow front.