Halo CME Mail

Date: Wed, 25 Oct 2000 16:00:00 +0000 (GMT)

From: Simon Plunkett

Subject: Full Halo CME on 2000/10/25

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UCMEO 93001 01016 1530/
01025 60826 91448 0001/ 360// 233// 40620
01025 60824 81000 42718 09201 1212/
99999

PLAIN

BT

LASCO and EIT observed a full halo CME today, 2000/10/25. The event was
first seen in LASCO at 08:26 UT, as a bright loop with core above the W
limb. It later extended to all position angles, although it remained
brightest and most structured in the W. The measured plane-of-sky speed
was 620 km/s at PA 270 (W limb).

EIT observed activity over a wide range of longitudes, from AR 9201 at
about N18 W27, all the way round to behind the W limb. The EIT
activity began at about 08:24 UT. Thus at least some component of this
halo event may be Earth directed. A class C4 X-ray flare was reported
beginning at 08:45 UT.

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

ftp://ares.nrl.navy.mil/pub/lasco/halo/20001025.

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       |
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