UCMEO 93001 40809 1800/
40808 61948 82236 2141/ 214// 323// 40452
40808 61918 81951 30422 13777 1112/
99999

PLAIN  


SOHO/LASCO  HALO CME August 8, 2024

C2 Start Time:  19:48 UT

C3 Start Time:  20:18 - 23:54 UT

Type of CME:
Symmetric HALO CME — FRONTSIDE
pa1:  214    pa2:  214      Total Width:  360 degrees

Velocity Measurements:

C2:   7 points    459.4 km/sec @ PA 214.63
C3:   4 points  439.7 km/sec @ PA 214.55
Average through both(C2/C3) fields:  452.2 km/sec  Acceleration: 6.66 m/sec^2

COMMENT:  LASCO C2/C3 shows a front-sided full HALO event with a bright
          leading edge near the southwest quadrant. A faint core can be
          seen propagating towards the southeast direction.

          NOAA/GOES reports a CME associated with a X1.3 solar flare
          from AR 13777 [S04W22]. Moving field lines can be seen in SDO
          193 @ 19:18 UT with a flare peaking @ 19:33 along with a EUV 		  
          wave.

          Due to gaps in data from 18:38 - 22:53 UT in STEREO/COR2 AHEAD,
          preliminary time/height measurements cannot be made. Despite a 		  
          loss in data at the beginning of the CME event, STEREO/COR 2 		  
          AHEAD shows a partial HALO with a bright leading edge in the 		  
          southeast direction.


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/2024/240808



Best Regards,

--Taylor Lanier

BT
[Images from original message are omitted here]

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