UCMEO 93001 40129
2130/
40129 60412 80830 0481/ 168// 233// 41412
40129 60354 80455 42886 13559 1222/
99999
PLAIN
SOHO/LASCO HALO CME January 29, 2024
C2 Start Time: 4:12 - 4:24 UT
C3 Start Time: 4:30 - 4:42 UT
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 48 pa2: 163
Total Width: 245 degrees
Velocity Measurements:
C2: 3 points 1509.1 km/sec @ PA
293.33
C3: 8 points 1414.8 km/sec @ PA 293.36
Average through both(C2/C3) fields: 1412.5 km/sec
Acceleration: 2.78 m/sec^2
COMMENT: LASCO C2/C3 show a relatively fast moving bright partial
halo CME.
The CME emerges with a bright leading edge and core from the NW . The
halo CME rapidly propagates outwards wrapping around to the N/E and S
.The halo CMEs source is a M6.8 class flare centered on N28W86 (AR
13559) observed best in SDO AIA 193/131. The flare is followed by post
eruptive arcades and an EUV wave.
LASCO shows extreme proton flux in the field of view. (SEP)
NOAA/GOES reports a M6.8 flare from AR 13559 03:54/04:38/04:55 UT
STEREO Beacon Data COR2 A, Preliminary time/height
at 5 points of measurement gives a velocity of 1428.1 km/s @PA 279.30.
STEREO COR2A shows a partial halo CME emerging from the NW beginning at
approximately 4:38 UT. The halo CME propagates outwards, wrapping
around to the N/E and S. The halo CME is followed by exteme proton flux
in the field of view.
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/2024/240129
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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