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/
99999
PLAIN
BT
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
ftp://ares.nrl.navy.mil/pub/lasco/halo/20031022
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
+