Halo CME Mail

Date: Thu, 30 Jan 2003 17:21

From: Gareth Lawrence

Subject: Full Halo CME on 2003/01/30, frontsided

Status: O

UCMEO 93001 30130 2215/
30130 60939 91954 0001/ 360// 223// 40567
30130 60612 90933 10212 ///// 2222/

LASCO and EIT observed a full halo CME on 2003/01/30. The 
event was first observed in C2 at 09:39 UT as a ragged loop 
front over the NW limb; by 10:06 UT separate bright loop
fronts were visible in the N, NW and S and by 11:39 it was
evident that they were all associated with the same event
and that emission could be seen around the entire C2
occulting disk, albeit faint in the E. The front first 
appeared in C3 at 11:54 UT with full coverage of the C3 
occultor by 12:54 UT. The mean plane-of-sky speed for this 
event was 567 km/s at PA 355, with evidence for moderate 
acceleration. Please note that as a result of the special 
campaign to observe comet C/2002 X5 (Kudo-Fujikawa) the 
start times are somewhat inaccurate.

The CME was probably most associated with an eruptive filament
observed by EIT between 06:13 - 09:33 UT, centered around N12W02
but exteding from ~N40E33 to ~S02W14 and possibly slightly more.
Neither an EIT wave nor dimming was observed in association with
this event. Note that the EIT cadence is slightly reduced from
normal around this time due to LASCO's comet observations.

Movies and images of this event are available now at: 

and note that comet C/2002 X5 (Kudo-Fujikawa) is clearly visible 
in the LASCO movies, moving top to bottom in the west. 

Some people may experience difficulties obtaining the images and 
movies at present; this is due to unresolved issues with the 
firewall at NRL. Aplogies to those affected; the problem is being 
worked on.

Best wishes,
        Gareth Lawrence.

| Gareth Lawrence,                   E-mail:grl@kreutz.nascom.nasa.gov |
| SOHO-LASCO Operations Scientist,				       |
| CUA, Mail Code 682.3,                                                |
| NASA Goddard Space Flight Center,      Phone:  +1-301-286-2941       |
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