UCMEO 93001 51030
2145/
51030 60424 80648 0452/ 045// 333// 51655
51030 60342 80424 ///// ///// 3112/
99999
PLAIN
SOHO/LASCO HALO CME October 30, 2025
C2 Start Time: 04:24 UT
C3 Start Time: 04:54 - 07:24 UT
Type of CME:
Partial HALO CME — BACKSIDE
pa1: 45 pa2: 45
Total Width: 360 degrees
Velocity Measurements:
C2: 4 points 1452.4 km/sec @ PA 25
C3: 5 points 1606.5 km/sec @ PA 25
Average through both(C2/C3) fields: 1655.6 km/sec
Acceleration: -53.23 m/sec^2
COMMENT:
A partial, backside HALO can be seen in LASCO C2/C3 @ 04:24 UT along
the Northeast quadrant. This partial HALO event is visible in COR2-A in
the Northern hemisphere first appearing @ 04:53 UT. SolarSoft reports
the origin of the CME deriving from a prominence eruption behind the
Northeast limb N22E88 accompanied by shockwave propagation. The
prominence eruption can be seen in GOES-19 SUVI Composite 195 Angstroms
with opening lines commencing @ 04:28 UT. The opening lines associated
with the prominence eruption begins @ 03:42 UT as shown in SDO AIA 193
near the Northeast limb.
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/2025/251030
Best Regards,
--Taylor Lanier
BT
[Images from original message are omitted here]
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