UCMEO 93001 30807
1750/
30805 62212 80142 0201/ 193// 333// 41670
30805 62145 82240 41177 13386 1112/
99999
PLAIN
SOHO/LASCO HALO CME August 5, 2023
C2 Start Time: 22:12 UT
C3 Start Time: 22:30 UT
Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 020 pa2: 193
Total Width: 173 degrees
Velocity Measurements:
C2: 3 points 1629.2 km/sec @ PA 285.87
C3: 8 points 1646.8 km/sec @ PA 285.64
Average through both(C2/C3) fields: 1670.1 km/sec Acceleration: -39.69 m/sec^2
COMMENT:
LASCO C2/C3 show a partial halo CME visible in the west. The CME starts
bright but quickly fades into a faint leading edge with cavity and core
that propagates westward. The event is associated with a X1.6 class
solar flare
centered on N11W77 (AR 3386), the flare is accompanied by an EUV wave
and post-eruptive arcades.
NOAA/GOES reports a X1.6 flare from AR 3386 21:45/22:21/22:40 UT
STEREO Beacon Data
COR2 A, show only the last few frames of the halo CME as there was a
gap in data when it began 19:38 - 23:53.
Preliminary time/height measure can not be given at this time due to data gap.
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_B
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
|
