Date: Wed, 21 Nov 2001 17:13
From: Gareth Lawrence
Subject: Partial Halo CME on 2001/11/21
Status: O
UCMEO 93001 11121 2200/
11121 61406 92142 1651/ 310// 223// 40395
11121 61248 91448 31815 09704 1222/
99999
PLAIN
BT
LASCO and EIT observed a partial halo CME on 2001/11/21. The
event was first observed in C2 at 14:06 UT as a very narrow
loop front over the SW limb; by 215:54 UT this front spanned
about 145 deg around the C2 occulting disk from PA 165 to
PA 310. The front first appeared in C3 at 15:18 UT with
maximal coverage of the C3 occultor by 17:18 UT. The plane
of sky speed of the front was measured as 395 km/s at PA 228
(SW) with very small acceleration through the coronagraphs'
fields of view.
The CME was most probably associated with a long duration C4.7
X-ray flare in AR9704 between 12:39 and 15:10 UT with peak
emission at 13:47 UT. EIT observed this flare between 12:48 and
14:48 UT, with peak emission at 13:36 UT. SEC places the flare
at S15W18. Neither an EIT wave nor a dimming was observed in
association with this event.
Images and movies of this event are available at:
ftp://ares.nrl.navy.mil/pub/lasco/halo/2001121
++
| 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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