Halo CME Mail

Date: Wed, 26 Dec 2001 21:42:35 +0000 (GMT)

From: Kevin Schenk

Subject: Partial HALO CME Event 2001/12/26

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

UCMEO 93001 11226 2030/
11226 70530 91030 1641/ 025// 333// 41069
11226 60436 80726 40854 09742 1222/
99999

BT

EIT and LASCO observed a partial HALO CME event on 2001/12/26.  The event
was first seen in C2 beginning 05:30 UT on December 26, 2001  as a bright,
190 degree wide loop front with cavity and core over the West hemisphere.
A fast event covering PA 164-25 degrees total with a velocity through C2
field at 1435 km/sec.  Event traveled through the C3 field and tracked to
30 Rs till 10:30 UT.  Deceleration though C3 averaged the plane-of-sky
speeds to 1069 km/sec at PA 299.  Large proton emission seen in Lasco C2,
C3 due to this event in white light images.

EIT sees a bright flare in the NorthWest near the limb of AR 9742 at
location [N 08; W 54].  This event appears at 04:36-0726 as a long
duration brightning.  High energy partical emission seen in EUV images.
A large post arcade of loopings follows till 12:00 UT.  GOES reports a
M7.14 class x-ray event from AR 9742 at the same timings as event in EIT.
This is probably related to the events seen in EIT and LASCO.

Images and movies are available on the LASCO server at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20011226/

Happy Holidays

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