UCMEO 93001 30724
1820/
30723 61505 82130 0111/ 190// 313// 30680
30723 61412 91447 42927 13376 1221/
99999
PLAIN
SOHO/LASCO HALO CME July 23, 2023 FRONTSIDE
C2 Start Time: 15:05 UT
C3 Start Time: 15:21 UT
Type of CME:
Assymmetric HALO CME — FRONTSIDE
pa1: 011 pa2:
190 Total Width: 179 degrees
Velocity Measurements:
C2: 4 points 678.9
km/sec @ PA 288.52
C3: 16 points 677.2 km/sec @ PA
288.41
Average through both(C2/C3) fields: 680.5 km/sec
Acceleration: -4.47 mk/sec^2.
COMMENT:
LASCO C2 and STEREO COR2 A both show a faint partial-halo originating
in the NW. The CME has a bright core with cavity with a faint leading
edge. LASCO C3 provides a better view of the CME as it propagates
westward.
The partial-Halo CME is associated with a flare of GOES Class C5.2
centered around N29W27 (AR 3372) as seen most clearly on SDO AIA 94,
and also 193. The flare is followed by post-eruption arcades.
STEREO Beacon Data COR2 A, shows the CME in the NW direction starting
at 14:53 UT. Preliminary time/height measurements gives a
velocity of 863.9 km/sec @ PA 315.59 using 8 points of measurement.
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/2023/230723/
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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