Halo CME Mail

Date: Tue, 9 Oct 2001 17:55

From: Gareth Lawrence

Subject: Full Halo CME on 2001/10/09

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

UCMEO 93001 11009 2300/
11009 61130 91942 0001/ 360// 233// 31041
11009 61100 91136 21723 09653 1212/
99999

PLAIN

BT

LASCO and EIT observed a full halo CME on 2001/10/09. The
event was first observed well into C2 at 11:30 UT as a fast,
bright, wide loop front over the S pole with extensions over
the E limb. By 11:54 UT the C2 occulting disk was surrounded.
The front first appeared in C3 at 11:42 UT with full coverage
of the C3 occultor by 12:42 UT. The plane of sky speed of the
front was measured as 1041 km/s at PA 188 (S) with significant
acceleration through the coronagraphs' fields of view.

The CME was most probably associated with an M1.4 X-ray flare in
AR9653 between 10:46 and 11:49 UT with peak emission at 11:13.
EIT also observed this flare between 11:00 and 11:36, peaking at
11:12. SEC places the flare at S23E17. An EIT wave was observed
in association with this event, but no significant dimming, and
bright post-eruption loops are clearly visible after 11:36 UT.

Images and movies of this event are available at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20011009

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 G-1,                         +1-301-286-3447       |
| Greenbelt, MD 20771.                   Fax:    +1-301-286-0264       |
++