UCMEO 93001 30712 1730/
30711 61924 82324 0001/ 360// 233// 40877
30711 61915 91945 23505 13363 2213/
99999

PLAIN


SOHO/LASCO  HALO CME July 11, 2023 FRONTSIDE

C2 Start Time:      19:24 UT

C3 Start Time:      19:54 UT 

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

Velocity Measurements:

C2:    6 points     698.6 km/sec @ PA 165.47
C3:    12 points   879.0 km/sec @ PA 165.31
Average through both(C2/C3) fields:      877.7 km/sec  Acceleration: 5.13 m/sec^2. 

COMMENT: LASCO C2/C3 show a bright halo CME in the southern region. The Cme is associated with a large filament eruption centered around location S35E05 (AR 3363) starting at approximately 19:15 UT, best seen on SDO AIA 193 , 304 . The event produces dimming toward the south and is followed by post-eruptive arcades around 20:42 UT.
 
 STEREO Beacon Data
 COR2 A, shows a bright CME pointed southwest-southward .
  Due to gaps in data, velocity and position measurements could not be completed at the 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/2023/230711

Best Regards,

--James Tabourne

BT



[Images from original message are omitted here]

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