Halo CME MailHalo CME Mail
Date: Thu, 8 Jan 2004 15:51
From: Guillermo Stenborg 
Subject: A Second Partial Halo CME on 2004/01/07, frontsided




UCMEO 93001 40108 2000/
40108 61654 90018 1101/ 260// 113// 30483
40108 61200 81700 20212 10536 4222/
99999
 
PLAIN
 
BT
 

LASCO/EIT observed another partial halo CME on 2004/01/07.
The event was first discerned in C2 at 16:54 UT preceded
by a faint ragged front first seen in C2 at 13:54 UT. It
evolved as a series of concentric loops moving S spanning 
~150 deg from PA 110 - 260 as measure in C3 at 23:42 UT. 
The mean plane-of-sky speed for this event averaged 483 km/s  
measured at PA ~180 based on C3 data.

The CME was probably related to activity on the NOAA AR 10536
located S12E02, which during the course of the day produced 
several B flares (peak emissions at 12:59, 13:35, 15:05, and 
16:00 UT) as well as a C1.0 flare (with peak emission at 
14:35 UT). EIT/FeXII images show a slight brightening of 
the surroundings of the AR slowly growing towards its W and 
SW, most clearly visible after 17:00 UT. To the S of the AR 
the quite sun region appears to dim somewhat over the course 
of some hours, and this can be interpreted in terms of material
being depleted from the low corona there.  

This event has therefore been determined most probably 
frontsided.

Movies and images of this event will shortly be
available at:
 
ftp://ares.nrl.navy.mil/pub/lasco/halo/20040107b

Best regards,
	Guillermo Stenborg

++
Dr. Guillermo A. Stenborg   
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

e-mail: stenborg@kreutz.nascom.nasa.gov
++