UCMEO 93001 40510 0100/
40508 62224 80442 0001/ 360// 312// 40785
40508 62204 82330 32321 13664 1222/
99999

PLAIN  


SOHO/LASCO  HALO CME May 8, 2024

C2 Start Time:  22:24 UT

C3 Start Time:  22:30 -23:10 UT

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

Velocity Measurements:

C2:   3 points    742.6 km/sec @ PA 273.13
C3:   9 points    783.5 km/sec @ PA 273.38
Average through both(C2/C3) fields:  785.5 km/sec  Acceleration: -5.37 m/sec^2

COMMENT:  LASCO C2/C3 show a halo CME emerging from all directions with faint leading edges with core and cavity seen in the SW. The  halo cme is associated with two flares centered on S23W21(AR 3664) with GOES Class ratings M9.9 and M9.7 respectively. The flares are accompanied by a wide EUV wave and wide opening lines seen best in SDO AIA 171.

NOAA/GOES reports a M9.9 flare from S23E21(AR 3664)  22:04/22:27/23:30 UT
NOAA/GOES reports a M9.7 flare from S23E21(AR 3664)  22:05/22:27/22:45 UT



STEREO Beacon Data COR2 A, due to gaps in data from 05/08/2024 20:53 UT - 05/09/2024  01:53 UT the halo CME could not be captured .Preliminary time/height measurements could not be performed 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/2024/240508_c



Best Regards,

--James Tabourne

BT
[Images from original message are omitted here]

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