UCMEO 93001 40223
1815/
40222 60012 80354 0881/ 251// 222// 41098
40221 62358 80031 23585 ///// 1222/
99999
PLAIN
SOHO/LASCO HALO CME February 22, 2024
C2 Start Time: 00:12 UT
C3 Start Time: 00:30 UT
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 88 pa2: 251
Total Width: 163 degrees
Velocity Measurements:
C2: 4 points 1246.0 km/sec @ PA
136.73
C3: 10 points 1080.6 km/sec @ PA 136.50
Average through both(C2/C3) fields: 1098.5 km/sec
Acceleration: -28.38 m/sec^2
COMMENT:
LASCO C2/C3 show a partial halo CME emerging from SE with a bright
leading edge. The CME progresses outwards towards the SE, while
wrapping towards the W. The
CME is the result of a M1.6 class flare beginning at 2/21 23:58
centered on S35E85 just about to rotate onto the visible disk. The
flare is followed by ejecta and post eruptive arcades seen best in SDO
AIA 171/304.
NOAA/GOES reports a M1.6 flare from S35E85 23:58/00:14/00:31 UT
STEREO Beacon Data COR2 A, due to gaps in data from 02/21/2024 13:23 UT
- 02/22/2024 03:23 UT the halo CME could not be
captured .Preliminary time/height measurements could not be performed
at this time .
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/2024/2402122
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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