SOHO/LASCO Halo CME 20230908

Halo Alert: halo-message.20230908

UCMEO 93001 30911 1700/
30908 61136 81630 0002/ 360// 233// 41108
30908 ///// ///// ///// ///// /////
99999

PLAIN

SOHO/LASCO HALO CME September 8, 2023

C2 Start Time: 11:36 UT

C3 Start Time: 12:06 UT

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

Velocity Measurements:

C2:   4 points 1302.9 km/sec @ PA 335.60
C3:   8 points   1073.9 km/sec @ PA 335.79
Average through both(C2/C3) fields: 1108.9 km/sec Acceleration: -49.07 m/sec^2

COMMENT: LASCO C2/C3 show a fast moving full halo CME. The halo CME's source is a backsided eruption .

STEREO Beacon Data COR2 A, Due to gaps in data STEREO COR2 A data is not available 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/2023/230908

Best Regards,

--James Tabourne

BT
[Images from original message are omitted here]

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SOHO/LASCO C2 Diff
SOHO/LASCO C3 Diff
SOHO/LASCO C2

STEREO/COR2 BEHIND

SOHO/LASCO C3 STEREO/COR2 AHEAD Diff
STEREO/COR2 AHEAD