UCMEO 93001 30807 1550/
30805 60700 81206 0001/ 360// 233// 41044
30805 60616 80810 40769 13386 1222/
99999

PLAIN


SOHO/LASCO  HALO CME August 5, 2023 

C2 Start Time: 7:00 UT

C3 Start Time: 7:30 UT

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

Velocity Measurements:

C2:    4 points     1089.5 km/sec @ PA 255.52
C3:    13 points   1017.6 km/sec @ PA 255.32
Average through both(C2/C3) fields:  1044.5 km/sec  Acceleration: -20.79 m/sec^2

COMMENT:  LASCO C2/C3 show a CME with a bright core emerging from the SW and propagating westward, the CME quickly loops around the east into a full Halo CME. The event is associated with a M1.6 class solar flare centered on N07W69 (AR 3386) that is not visible on SDO AIA due to an eclipse occuring during the time of the event.

LASCO shows extreme proton flux in the field of view. (SEP)

NOAA/GOES reports a M1.6 flare from AR 3386 06:16/07:22/08:10 UT

STEREO Beacon Data
COR2 A, shows a bright core CME emerging from the West 7:23 - 10:23 UT.
Preliminary time/height measure gives 1145.4 km/sec @ 248 degrees.

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/2023/230805



Best Regards,

--James Tabourne

BT
[Images from original message are omitted here]

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