UCMEO 93001 40216
1800/
40216 60125 80518 0002/ 360// 233// 31719
40216 ///// ///// ///// ///// /////
99999
PLAIN
SOHO/LASCO HALO CME February 16, 2024
C2 Start Time: 1:25 UT
C3 Start Time: 1:42 UT
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 000 pa2: 360
Total Width: 360 degrees
Velocity Measurements:
C2: 2 points 1568.8 km/sec @ PA 169.05
C3: 8 points 1688.7 km/sec @ PA 169.61
Average through both(C2/C3) fields: 1719.5 km/sec
Acceleration: -45.07 m/sec^2
COMMENT:
LASCO C2/C3 show a full halo CME emerging from the S with a bright
leading edge and core. The CME progresses outwards in all directions
with the bulk of the CME being in the S direction. The CME can be seen
wrapping around the N into a full halo by 2:48 UT in C2 imagery. The
CME is the result of a backsided eruption likely from AR 13575,
evidence of opening field lines beyond the southern limb starting
around 1:15 UT seen best in SDO AIA 173.
STEREO Beacon Data COR2 A, due to gaps in data from 02/15/2024 12:53 UT
- 02/16/2024 02:53 UT only the ending of 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/2024/2402116
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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