From plunkett@kreutz.nascom.nasa.gov Tue Jun  6 20:31:57 2000
Date: Tue, 6 Jun 2000 19:40:29 +0000 (GMT)

Subject: Halo CME on 2000/06/06

LASCO and EIT observed a full halo CME today. The event was first visible
at all position angles in C2 at 15:54 UT. It appears as a bright front,
particularly over the N pole, with trailing filamentary material. The
plane-of-sky speed of the leading edge of the halo is about 908 km/s,
possibly with some deceleration in the outer part of the C3 field of view.

The halo is probably associated with an X2.3 flare and filament eruption 
in AR 9026, located at about N21 E15. EIT observed the flare and filament
eruption beginning at about 15:12 UT. There was also an earlier X1.1 flare
and filament eruption from the same region, that was observed by EIT at
about 13:36 UT. This flare was probably associated with an earlier CME
that merged with the halo in C2.

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

ftp://ares.nrl.navy.mil/pub/lasco/halo/20000606.

Best wishes,

Simon Plunkett.

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