Halo CME Mail

Date: Wed, 28 Nov 2001 16:41

From: Gareth Lawrence

Subject: Partial Halo CME on 2001/11/28

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UCMEO 93001 11128 2130/
11128 61706 82042 2201/ 068// 223// 40439
11128 61612 91700 11604 09715 1112/
99999

PLAIN

BT

LASCO and EIT observed a partial halo CME on 2001/11/28. The
event was first observed in C2 at 17:06 UT as a very narrow
loop front over the NE limb; by 17:54 UT this front spanned
about 208 deg around the C2 occulting disk from PA 220 to
PA 68. The front first appeared in C3 at 18:18 UT with
maximal coverage of the C3 occultor by 19:42 UT. The plane
of sky speed of the front was measured as 439 km/s at PA 18
(NE) with very small deceleration through the coronagraphs'
fields of view. Please note that at the time of writing
C3 data was only available to a distance of about 15 Rs.

The CME was most probably associated with a M6.9 X-ray flare
in AR9715 between 16:26 and 16:41 UT with peak emission at
16:35 UT. EIT observed this flare between 16:12 and 17:00 UT,
with peak emission at 16:36 UT. SEC places the flare at
N04E16. Both an EIT wave and dimming were observed in
association with this event.

Images and movies of this event are available at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/2001128

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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