Halo CME Mail

Date: Tue, 9 Jul 2002 15:44

From: Gareth Lawrence

Subject: Full Halo CME on 2002/07/09, backsided

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Status: O

LASCO observed a full halo CME on 2002/07/09. Bright emission
was first seen well into C2 all around the occulting disk at
19:31 UT. The 20:18 UT C3 image shows the leading edge at ~10 Rs
with emission all around the occulting disk. The previous C2 and
C3 images were taken at 18:30 and 18:18 UT respectively; the
relatively poor image cadence in both coronagraphs is due to
EIT taking a set of synoptic images in all four wavelengths from
19:00 UT, and the present C2 polarisation image campaign.

The difference between the EIT 195A images taken at 18:24 and
19:13 UT clearly show evidence of a large backsided CME over
the W limb, hence this event has been determined backsided.

Best wishes,
  Gareth Lawrence.

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