Halo CME MailHalo CME Mail
Date: Tue, 11 Nov 2003 16:01
From: Gareth Lawrence 
Subject: Full Halo CME on 2003/11/11, backsided




LASCO observed a full halo CME on 2003/11/11. A bright
loop was first visible in C2 images at 02:30 UT spanning
from the SE to NW while fainter extensions were visible
around the rest of the occultor. A bright loop front was 
visible from the SE and NW in C3 images at 02:42 UT and 
had developed to a full halo CME by 03:18 UT.

EIT running difference images clearly show a major 
backsided eruption from 02:12 UT, with peak activity 
at 02:24 UT. This event has therefore been determined 
backsided.

Note that the westward asymmetry of this CME in
LASCO images is consistent with the likely position
of old AR 0486. Please note also that LASCO and EIT 
have observed a number of fast bright backsided E limb 
CMEs that are consistent with the expected position 
of old AR 0484, which rotated over the W limb on
2003/10/30.

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
++