Halo CME Mail

Date: Thu, 16 Nov 2000 17:22:37 +0000 (GMT)

From: Simon Plunkett

Subject: Backside halo event on 2000/11/15

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LASCO observed a full halo CME late yesterday, 2000/11/15. The event was
first visible over the N pole in C2 at 23:54 UT, and later became a very
symmetrical and bright full halo. The lack of associated activity in EIT
images suggests that this was a backside event. This alert is being sent
because the event was bright enough to be visible in the daily movies
posted on our web site.

EIT observed a flare and wave event from AR 9231 located in the SE
quadrant of the disk, beginning at about 00:12 UT on 11/16. This event is
too late to be associated with the halo, but did produce another CME. It
is very difficult to separate these events in the LASCO images.

Best wishes,

Simon Plunkett.

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| 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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