SOHO/LASCO Halo CME 20220310

Halo Alert: halo-message.20220310

UCMEO 93001 20311 1750/
20310 61900 80154 0001/ 360// 333// 40621
20310 61636 82018 41225 12962 1212/
99999

PLAIN

SOHO/LASCO HALO CME March 10, 2022

C2 Start Time:     19:00 UT

C3 Start Time:        20:06 - 01:54 UT

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

Velocity Measurements:

C2    5 points    545.8 km/sec @ PA 340
C3    10 points    667.0 km/sec @ PA 340
Average through both fields:     621.1 km/sec Acceleration: 17.48 m/sec^2.

COMMENT:       AIA 304 shows a long duration duel ribbon flare (C2.8) of
            AR 12962 at location [N25, W12] 17:39 - 20:18 UT.
            A dimming of the region is seen to the West and
            South followed by a post loop arcade.


            STEREO Beacon Data
            COR2 A, shows a bright loop CME over the West 19:23 - 23:23 UT.
            Preliminary time/height measure gives 506.3 km/sec @ 298 degrees.


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/2022/220310/

Best Regards,

--Kevin Schenk

BT

[Images from original message are omitted here]

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