UCMEO 93001 40105 1710/
40104 60000 80418 0002/ 360// 112// 30470
40104 ///// ///// ///// ///// /////
99999
PLAIN
SOHO/LASCO HALO CME January 4, 2024
C2 Start Time: 00:00 UT
C3 Start Time: 00:30 UT
Type of CME:
Asymmetric HALO CME — BACKSIDE
pa1: 000 pa2:
360 Total Width: 360 degrees
Velocity Measurements:
C2: 5 points 518.3 km/sec @ PA 15.26
C3: 11 points 440.1 km/sec @ PA 15.54
Average through both(C2/C3) fields: 470.2 km/sec
Acceleration: -14.77 m/sec^2
COMMENT: LASCO C2/C3 show a very faint halo CME.
The CME emerges with a bright leading edge from the north east
direction. The halo CME propagates outward in all directions with very
faint lines seen best in C3.The halo CMEs source is a
far-sided eruption, evidence of opening field lines seen beyond the NE
limb beginning at 02/03 23:24 UT seen best in SDO AIA 171.
STEREO Beacon Data COR2 A, due to gaps in data from 19:38 - 00:53 UT,
only the ending of the CME could be captured. Preliminary time/height
could not be gathered 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/2024/240104
Best Regards,
--James Tabourne
BT
[Images from original message are omitted here]
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