Halo CME Mail

Date: Fri, 24 Jan 2003 18:14

From: Gareth Lawrence

Subject: Partial Halo CME on 2003/01/24, frontsided

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

UCMEO 93001 30124 2215/
30124 60454 91542 3551/ 137// 213// 40283
30124 60312 90424 21022 10266 1212/
99999

PLAIN

BT

LASCO and EIT observed a partial halo CME on 2003/01/24. The
event was first observed in C2 at 04:54 UT as a faint loop
front over the SE limb; by 06:54 UT the front spanned 142 deg
from PA 355 - 137, though the extensions to the N pole were
extremely faint. The front first appeared in C3 at 06:42 UT with
maximal coverage of the C3 occultor by 09:18 UT. The mean
plane-of-sky speed for this event was 283 km/s at PA 110,
with a highly linear height-time profile. Please note that
the CME does not show up at all well in the C3 image and
movie.

The CME was probably most associated with a flare observed by
EIT between 03:12 - 04:24 UT with peak emission at 03:36 UT,
centered around S22E10. SEC records a M1.9 X-ray event from
AR10266 at S22E10 between 03:01 - 04:17 UT with peak emission
at 03:26 UT. An EIT dimming, but no wave, were observed in
association with this event, largely to the N and S of the
active region.

Movies and images of this event are available now at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20030124

Best wishes,
        Gareth Lawrence.

++
| Gareth Lawrence,                   E-mail:grl@kreutz.nascom.nasa.gov |
| SOHO-LASCO Operations Scientist,                                     |
| CUA, Mail Code 682.3,                                                |
| NASA Goddard Space Flight Center,      Phone:  +1-301-286-2941       |
| Building 26, Room 001,                         +1-301-286-3447       |
| Greenbelt, MD 20771.                   Fax:    +1-301-286-0264       |
++