UCMEO 93001 30808
1530/
30807 62048 80000 0501/ 125// 233// 41874
30807 62030 82104 41288 13386 1112/
99999
PLAIN
SOHO/LASCO HALO CME August 7, 2023
C2 Start Time: 20:48 UT
C3 Start Time: 21:18 UT
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 050 pa2: 125
Total Width: 285 degrees
Velocity Measurements:
C2: 1 point *** km/sec @ PA
294
C3: 8 points 1844.2 km/sec @ PA 294.48
Average through both(C2/C3) fields: 1874.1 km/sec
Acceleration: -17.04 m/sec^2
COMMENT:
LASCO C2/C3 show a fast moving partial halo CME emerging from the west.
The CME starts
bright then fades into a faint leading edge that propagates westward,
with no presence in the east. The event is associated with a X1.5 class
solar flare
centered on N12W88 (AR 3386), the flare is accompanied by an EUV wave
and post-eruptive arcades.
NOAA/GOES reports a X1.5 flare from AR 3386 20:30/20:46/21:04 UT
STEREO Beacon Data
COR2 A, Preliminary time/height measure can not be given at this time
due to data gap 19:23 - 4:23 .
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/2023/230807
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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