Halo CME Mail

Date: Wed, 22 Oct 2003 16:57

From: Gareth Lawrence

Subject: Partial Halo CME on 2003/10/22, frontsided

Status: O

UCMEO 93001 31022 2200/
31022 60754 91442 1155/ 040// 233// 40898
31022 60500 91024 11908 10484 1112/

LASCO and EIT observed a partial halo CME on 2003/10/22. A wide 
bright loop was first seen in C2 at 07:45 UT in the NE; by 10:30 UT 
the front spanned ~265 deg from PA 155-40. The front first appeared 
in the NE in C3 images at 09:42 UT and reached its maximal extent 
by 11:18 UT. The mean plane-of-sky speed was 651 km/s, measured at 
PA 355 with strong acceleration to ~10 Rs and a more linear profile
thereafter: the mean speed beyond 10 Rs was 898 km/s.

EIT observed a number of eruptive events associated with this CME.
The bright front to the N appears to be associated with a large
expanding eruptive loop system and subsequent eruptive prominence
that EIT observed between 05:00 - 08:12 UT centered N08E19, N of
AR 0484. These loops are later seen spanning N25E44 - N15W08 by 
07:13 UT though the eruptive prominence appears more spatially 
limited. Then between 08:36 - 09:12 UT much activity was observed 
in and S of AR 0483 which appears to activate and destabilise a
large prominence which erupts between 09:12 - 10:24 UT. The
greater part of this prominence from S43E44 to S04W15 erupts and
this appears to be associated with the front that appears to
the S in LASCO images from 09:54. 

Images and movies will shortly be available at  


Best wishes,
        Gareth Lawrence.

+----------PLEASE NOTE NEW EMAIL ADDRESS-----------+
Gareth Lawrence,           grl@grace.nascom.nasa.gov 
SOHO-LASCO Operations Scientist,                                           
CUA, MC 682.3, Bldg 26, Rm 001,   F: +1-301-286-0264         
NASA Goddard Space Flight Center,
Greenbelt, MD 20771.              P: +1-301-286-2941