Halo CME Mail

Date: Fri, 16 Feb 2001 12:42

From: Gareth Lawrence

Subject: Full Halo CME, 2001/02/15

  ------------------------------------------------------------------------

UCMEO 93001 10216 1730/
10215 61354 92218 0001/ 360// 333// 40601
10215 61236 91512 11607 0//// 3112/
99999

PLAIN

BT

LASCO and EIT observed a full halo CME on 2001/02/11. The event was
first observed in C2 at 13:54 UT, as a bright loop front over the NE limb.
At 14:30 this bright front extended from about PA 275 to PA 90, while
fainter extensions could be seen around the remainder of the C2 occulting
disk. The north-westerly front first appeared in C3 at 14:42 and the
the occulting disk was surrounded by 16:18. The plane-of-sky speed of
the leading edge through to the edge of the C3 field of view was about
610 km/s at PA 16 (NE limb).

The CME was probably associated with an eruptive filament observed near
disk center by EIT between 12:36 and 15:12 UT. The center of the region
first visibly affected was N07E12 though the greater part of EIT activity
appeared somewhat to the N and E of this, consistent with the first
appearance of the CME over the NE limb. This site of origin was somewhat
to the S and W of AR 9350 but unconnected to it. There were no GOES
signatures associated with this event.

Images and movies of this event are available at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20010215.

Best wishes,

        Gareth Lawrence.
++
| Gareth Lawrence,                 E-mail:grl@ajcannon.nascom.nasa.gov |
| SOHO-LASCO Operations Scientist,                                     |
| CUA, Mail Code 682.3,                                                |
| NASA Goddard Space Flight Center,      Phone:  +1-301-286-3412       |
| Building 26, Room G-1,                         +1-301-286-3447       |
| Greenbelt, MD 20771.                   Fax:    +1-301-286-0264       |
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