SOHO/LASCO Halo CME 20230704

Halo Alert: halo-message.20230704

UCMEO 93001 30705 1700/
30704 60212 80409 0601/ 258// 133// 40504
30704 60412 80936 22212 13359 4212/
99999

PLAIN

SOHO/LASCO HALO CME July 4, 2023 FRONTSIDE

C2 Start Time:      4:12 UT

C3 Start Time:      5:30 UT

Type of CME:
Assymmetric HALO CME — FRONTSIDE
pa1: 60      pa2: 258       Total Width: 198 degrees

Velocity Measurements:

C2:    11 points     336.3 km/sec @ PA 165.51
C3:    19 points     538.1 km/sec @ PA 165.41

Average through both(C2/C3) fields:      504.1 km/sec Acceleration: 17.16 m/sec^2.

COMMENT: LASCO C2/C3 show a slow moving partial halo CME. SDO/AIA 193 shows post-eruptive arcades (AR 12259) S22E12.



Preliminary UCMEO velocity and position measurements will be delivered first.

Best Regards,

--James Tabourne

BT

[Images from original message are omitted here]

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