Halo CME Mail

Date: Wed, 13 Feb 2002 22:15:58 +0000 (GMT)

From: Kevin Schenk

Subject: FULL HALO CME 2002/02/12

  ------------------------------------------------------------------------

UCMEO 93001 20213 2130/
20212 61506 80242 0701/ 069// 233// 40414
20212 61436 81800 11237 09825 1122/
99999

BT

EIT and LASCO observed a full HALO CME on 2002/02/12.  The event was first
seen in C2 at 15:06 UT as a bright symetric loop front with core over the
North East quadrant centered at PA 70 degrees.  This event developed to a
full HALO with faint material at all postion angles by 19:00 UT.  The
event was first seen in C3 field at 16:42 UT.  Plane-of-sky speeds
averaged to 20Rs measured 414 km/sec with slight acceleration into the C3
field.  This event in the Corona may have been possibly caused by more
than one single event.  Complex interior muli-loop structure followed the
front which makes this event difficult to determine.

EIT sees a wave/flow of material through a channel East of AR 9825 located
in the NE at location [N12; E37] beginning 13:26 UT and crosses the limb
to backside of disk.  At 14:36 UT a flare from AR9825 with CME of East SE
projection and wave occurs.  GOES reports a C5.8 x-ray flare from AR9825
at this time.  These two events may possibly be the cause of the complex
HALO seen in Lasco.  This event is not completely a front side event.

Images and movies of this event are available on the Lasco servers at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20020212/

Best reguards,

Kevin Schenk
EIT and LASCO Operations
Nasa-Goddard Space Flight Center, USA