UCMEO 93001 40211 2130/
40210 60336 80718 2361/ 333// 233// 31325
40210 60304 80410 21588 13584 1222/
99999

PLAIN  


SOHO/LASCO  HALO CME February 10, 2024

C2 Start Time:  3:36 UT

C3 Start Time:  3:30 - 4:06 UT

Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1:  236    pa2:  333      Total Width:  263 degrees

Velocity Measurements:

C2:   2 points  1152.4 km/sec @ PA 89.80
C3:   11 points 1322.9 km/sec @ PA 89.16
Average through both(C2/C3) fields:  1325.6 km/sec  Acceleration: 1.61 m/sec^2

COMMENT:  LASCO C2/C3 show a bright partial halo CME emerging from the E with a bright leading edge and core. The halo CME has bulk portion towards the E as it propagates outwards. The CME wraps to the N and S as it progresses almost becoming a full halo. The halo CME is result of a M3.4 flare centered around S15E88(3584), just beyond the SE limb. The flare is faccompanied by opening field lines,EUV wave and post-eruptive arcades seen best in SDO AIA 193/171.

NOAA/GOES reports a M3.4 flare 03:04/03:54/04:10 UT

STEREO Beacon Data COR2 A, Preliminary time/height at 5 points of measurement gives a velocity of 1275.6 km/s @PA 95.48. STEREO COR2A shows a halo CME emerging from the E beginning at approximately 3:53 UT. The halo CME propagates outwards towards the E while wrapping around to the N and S

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/2024/240210



Best Regards,

--James Tabourne

BT
[Images from original message are omitted here]

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