UCMEO 93001 40603 1500/
40601 61900 80018 0002/ 360// 123// 40920
40601 ///// ///// ///// ///// /////
99999

PLAIN  


SOHO/LASCO  HALO CME June 1, 2024

C2 Start Time:  19:00 UT

C3 Start Time:  19:30 UT

Type of CME:
Symmetric HALO CME — BACKSIDE
pa1:  000    pa2:  360      Total Width:  360 degrees

Velocity Measurements:

C2:   4 points    915.0 km/sec @ PA 108.27
C3:   10 points  916.2 km/sec @ PA 108.40
Average through both(C2/C3) fields:  920.8 km/sec  Acceleration: -9.38 m/sec^2

COMMENT:  LASCO C2/C3 shows a full asymmetric halo CME emerging from the East with a bright leading edge. As the halo CME propagates outwards in all directions, it wraps around to the NW into a full halo. The source of this CME is likely a backsided eruption as evidence of faint field lines beyond the east limb seen starting at 18:39 in AIA 171.

STEREO Beacon Data COR2 A, due to gaps in data from 21:23 UT - 01:23 UT 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/2024/240601



Best Regards,

--James Tabourne

BT
[Images from original message are omitted here]

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