UCMEO 93001 40223
1715/
40221 61824 80018 0001/ 178// 322// 30631
40221 61730 81846 40540 ///// 2212/
99999
PLAIN
SOHO/LASCO HALO CME February 21, 2024
C2 Start Time: 18:24 UT
C3 Start Time: 19:18 - 19:54 UT
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 000 pa2: 178
Total Width: 178 degrees
Velocity Measurements:
C2: 7 points 497.8 km/sec @ PA 257.36
C3: 9 points 551.5 km/sec @ PA 257.57
Average through both(C2/C3) fields: 631.5 km/sec
Acceleration: -18.26 m/sec^2
COMMENT:
LASCO C2/C3 show a partial halo CME emerging directly from the W with a
bright leading edge. The CME progresses outwards towards the W, with a
bright core and cavity and faint leading edges surrounding seen best in
C3. The
CME is the result of a filament eruption seen taking off at
approximately 17:30 UT, on the western hemisphere of the disk. The
eruption is followed by dimming and post eruptive arcades centered at
N05W40.
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 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/2024/2402121
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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