UCMEO 93001 40215
1600/
40214 60412 80818 0002/ 360// 233// 31947
40214 ///// ///// ///// ///// /////
99999
PLAIN
SOHO/LASCO HALO CME February 14, 2024
C2 Start Time: 4:00 - 4:12 UT
C3 Start Time: 3:54 - 4:30 UT
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 000 pa2: 360
Total Width: 360 degrees
Velocity Measurements:
C2: 1 point ***.* km/sec @ PA 192
C3: 6 points 1841.0 km/sec @ PA 192.42
Average through both(C2/C3) fields: 1947.1 km/sec
Acceleration: **** m/sec^2
COMMENT:
LASCO C2/C3 show a full halo CME emerging from the SW with a bright
leading edge and core. The bulk of the CME propagates in the SW
direction but also wraps around to the NE making it a full halo as it
progresses outwards. The progression to a full halo occurs by 4:48 UT
in C2 and 5:30 UT in C3. The CME is the result of a far sided eruption
as evidence of opening field lines and an EUV wave observed beyond the
SW limb beginning at 3:51 UT best seen in SDO AIA 171/193.
STEREO Beacon Data COR2 A, preliminary time/height measurements gives a
velocity of 1962.9 km/s at a PA of 197.57. STEREO COR2A shows a bright
halo emerging from the SW at 4:23UT. The CME progresses outwards in all
directions with majority of the CME being in the SW. As the CME
propages outwards it wraps around to the NE into a full halo.
Preliminary UCMEO velocity and position measurements are delivered
first.
Images, movies, and time/height information for this event will be
available at:
https://umbra.nascom.nasa.gov/lasco/observations/halo/2024/2402114
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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