Halo CME Mail

Date: Mon, 2 Apr 2001 12:02:34 -0400 (EDT)

From: Gareth Lawrence

Subject: Backsided full halo CME on 2001/04/01

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LASCO observed a full halo CME on 2001/04/01. A bright front first
appeared, filling the SE quadrant of C2's field of view, at 11:26 UT.
The bright front spanned approximately 180 deg from the NE to SW by
12:50, with fainter extensions around the rest of the occulting disk.

This CME has been determined backsided and was probably associated
with the long duration M5.5 X-ray flare observed between 10:55 and
13:24 by GOES. This flare can be discerned in EIT with apparent
peak activity at 11:00. Bright post-flare loops are evident on or
over the SE limb from about 12:00.

Best regards,
        Gareth Lawrence.

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| Gareth Lawrence,                 E-mail:grl@ajcannon.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       |
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