UCMEO 93001 40202 2130/
40201 60748 81242 0001/ 360// 113// 30597
40201 60722 80900 12005 ///// 1212/
99999

PLAIN  


SOHO/LASCO  HALO CME February 1, 2024

C2 Start Time:  7:48 UT

C3 Start Time:  8:30 UT

Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1:  48    pa2:  163      Total Width:  245 degrees

Velocity Measurements:

C2:   6 points  641.7 km/sec @ PA 15.60
C3:   14 points  587.0 km/sec @ PA 15.55
Average through both(C2/C3) fields:  597.3 km/sec  Acceleration: -10.46 m/sec^2

COMMENT:  LASCO C2/C3 show a faint full halo CME emerging from the NE with a bright lesding edge. Faint lines are seen in C2 propagating outwards in all directions. The halo CME is result of a C3.0 flare centered around N20E05. The flare is followed by dimming and post-eruptive arcades seen best in SDO AIA 193. Due to an eclispe in SDO from 02-01 16:2 UT - 7:51 UT the eruption is partially obscured.


NOAA/GOES reports a C3.0 flare 07:22/07:43/09:00 UT

STEREO Beacon Data COR2 A, Preliminary time/height at 9 points of measurement gives a velocity of 620.6 km/s @PA 23.77. STEREO COR2A shows a halo CME emerging from the NE beginning at approximately 7:53 UT. The halo CME propagates outwards in our directions, though not seen as clearly as C2.

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/2024/240129



Best Regards,

--James Tabourne

BT
[Images from original message are omitted here]

________________________________________________
Soho-halo-alert mailing list
Soho-halo-alert@mail.nascom.nasa.gov
https://mail.nascom.nasa.gov/mailman/listinfo/soho-halo-alert