UCMEO 93001 40202 2130/
40210 62336 80330 0001/ 360// 213// 30663
40210 62256 82314 31213 13576 1212/
99999

PLAIN  


SOHO/LASCO  HALO CME February 10, 2024

C2 Start Time:  23:36 UT

C3 Start Time:  00:06 UT

Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1:  000    pa2:  360      Total Width:  360 degrees

Velocity Measurements:

C2:   5 points  776.6 km/sec @ PA 357.38
C3:   9 points  645.2 km/sec @ PA 357.43
Average through both(C2/C3) fields:  663.9 km/sec  Acceleration: -26.87 m/sec^2

COMMENT:  LASCO C2/C3 show a faint full halo CME emerging fromall directions with a bright core in the NW.  Faint lines are seen in C2/C3 propagating outwards in all directions. The halo CME is result of a M9.0 flare centered on S12W12(AR 3576). The flare is followed by dimming and EUV wave seen best in SDO AIA 193. The flare is alos accompanied with filament ejecta seen during and after the eruption in SDO/AIA 304.


NOAA/GOES reports a M9.0 flare 22:56/23:07/23:14 UT

STEREO Beacon Data COR2 A, due to gaps in data from 15:23 - 02:23 preliminary time/height could not be completed 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/2024/240210_b



Best Regards,

--James Tabourne

BT
[Images from original message are omitted here]

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