Halo CME MailHalo CME Mail
Date: Wed, 7 Jan 2004 18:33
From: Guillermo Stenborg 
Subject: Partial Halo CME on 2004/01/07, frontsided




UCMEO 93001 40107 2230/
40107 61006 91342 3551/ 177// 323// 31770
40107 61014 81124 17506 ///// 1122/
99999
 
PLAIN
 
BT


LASCO/EIT observed a partial halo CME on 2004/01/07. 
The event was first observed in C2 at 10:06 UT 
as a loop front emerging from the East limb slightly
North of Equator. Following frames show a well defined
loop with strong cavity and inner core spanning ~182 
deg from PA 355 - 177 as measure in C3 at 12:18 UT.
The mean plane-of-sky speed for this event averaged 
1770 km/s measured at PA 65 based on C2 and C3 data. 
Note that at 11:06 UT another CME at the position of 
the northern leg of the previous CME (in C2) seems 
to come out (only a couple of images at the time of the 
analysis, i.e., 17:00 UT).

The CME was probably associated with an M8.3 X-ray 
flare from an still unnumbered AR located N06E75 
which GOES records between 10:14 - 10:33 UT with peak 
emission at 10:27 UT. EIT/Fe XII images show a sudden 
brightening at the aforementioned region at 10:24 UT. 
An EIT wave was observed in association with this event. 
This event has therefore been determined frontsided. 

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

Please note that the report was slightly delayed in
sending due to transition cross-references. 

Best regards and hello!

	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
++