Halo CME Mail

Date: Mon, 16 Oct 2000 15:36:07 +0000 (GMT)

From: Simon Plunkett

Subject: Halo CME on 2000/10/16

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

UCMEO 93001 01016 1530/
01016 60727 90942 0001/ 360// 733// 41226
01016 60636 91000 49000 ///// 1212/
99999

PLAIN

BT

LASCO and EIT observed a halo CME today, 2000/10/16. The event was first
visible in C2 at 07:27 UT, as a bright front over the West limb. Faint
extensions were visible over the East limb at all PA. The measured
plane-of-sky speed was 1226 km/s at PA 270 (W limb).

EIT observed two events on the W limb, one beginning at about 05:48 UT,
and the other at about 06:36 UT. The combination of these events was
reported as a long-duration M2.5 X-ray flare. This indicates that the
event was really a limb event that appears as a halo, presumably because
of deflections of pre-existing coronal structures by the fast CME.

Images and movies of this event are available at the LASCO ftp server:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20001016.

Best wishes,

Simon Plunkett.

++
| Simon Plunkett,              E-mail: plunkett@kreutz.nascom.nasa.gov |
| USRA, 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       |
++