Halo CME MailHalo CME Mail
Date: Tue, 10 Jun 2003 18:28
From: Gareth Lawrence 
Subject: Full Halo CME on 2003/06/10, probably backsided




LASCO observed a faint full halo CME on 2003/06/10.
An extremely faint front first appeared in the SE at
06:06 UT, developing to a faint full halo CME by 
06:30 UT. The front first appeared in C3 at 07:42 UT
as a full halo CME. The event appears bright in the
NE and NW in projection with existing material; it 
is faint elsewhere and very hard to identify in the
SW, particularly in C3 data.

Neither EIT, SXI nor GOES record a great deal of 
frontsided solar activity, though nor do EIT data
indicate a backsided event. This event has therefore
been determined most probably backsided. Note that 
the overall morphology of the CME is consistent 
with a backsided source fairly close to the far disk 
center, which in turn is consistent with continuing 
activity from old AR 0365 which transited the W limb
at the end of May.

Please note also that on 2003/06/10 at ~15 UT, LASCO's 
doors were close in preparation for spacecraft maneuvers
on 2003/06/11. The doors are scheduled to reopen on
2003/06/13 at ~15 UT. Therefore, no LASCO data will 
be available for comparison with the increasing level 
of activity within AR 0375, presently in the NW.

Finally, a number of full and partial halo CMEs occurred
during the May 26-31 period without accompanying reports.
This was due to a combination of personal vacation,
meetings and ongoing security-related hardware issues 
at GSFC. I apologise for the inability to provide these
reports in a timely manner. The reports, movies and 
images will be generated and hosted in the usual 
locations, so please check the report archive at 

http://lasco-www.nrl.navy.mil/cgi-bin/halocme_parse

for their delayed addition.

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
++