SOHO/LASCO Partial HALO CME 121127
UCMEO 93001 21127 1830/
21127 60248 80842 3241/ 190// 323// 40930
21127 60206 80451 15215 ///// 2112/
99999
PLAIN
SOHO/LASCO observed a partial HALO CME on November 27, 2012. Event is first seen in
C2 beginning 02:48 UT with a loop over the NE with cavity and core. The event expands
with extensions PA 324 - 190 for a total width of 226 degrees wide. The event continues
into the C3 field beginning 03:18-08:42 UT out to the edge of field at 30 Rsun in the
Northeast.
Time/height measurements were marked at 4 points in C2 with speeds of
828.2 Km/sec at pa 50 degrees. The event is marked to 13 points in C3.
Speeds average through both fields to 929.9 Km/sec at PA 50 degrees.
Acceleration 7.94 m/sec^2.
SDO AIA 193 and 304 shows activated prominence material near the limb in the NE at
location [N22, E65] beginning 01:00 UT. Eruption begins 02:06-04:51 UT along
with flaring of area at [N15, E52]. The event produces a dimming and small
wave along with a post loop arcade.
STEREO: BEACON data
COR2 B, 03:55 UT in progress, an expanding loop over the West hemisphere.
Preliminary time/height measure gives 575.3 km/sec velocity at LE.
EUVI B 195, 11/26 16:16-01:46 UT data gap. Region on West limb with brightening
and post arcade.
COR2 A, 00:00-05:24 UT Data gap. At first frame, asymmetric HALO near edge of field.
EUVI A 195, n/a
The observation of this event is considered 'GOOD'. This CME is determined FRONTSIDED.
Images and movies and time/height information for this event is available on the web at:
http://umbra.nascom.nasa.gov/lasco/observations/halo/2012/121127/
Best regards,
Kevin Schenk
Solar Heliospheric Observatory
EIT and LASCO Operations
NASA-Goddard Space Flight Center, USA
BT
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