SOHO/LASCO Halo CME 20260205

Halo Alert: halo-message.20260205

UCMEO 93001 60206 2000/
60205 62324 80300 0782/ 078// 133// 40458
60205 62348 82351 10888 ///// 1222/
99999

PLAIN

SOHO/LASCO HALO CME February 5, 2026

C2 Start Time: 23:24 UT

C3 Start Time: 00:30 – 04:30 UT

Type of CME:
Partial HALO CME — BACKSIDE
pa1: 78      pa2: 78       Total Width: 360 degrees

Velocity Measurements:

C2 7 points 416.8 km/sec @ PA 78
C3 6 points 585.8 km/sec @ PA 78
Average through both fields: 458.4 km/sec Acceleration: 36.25 m/sec^2.

COMMENT: A partial HALO event can be seen in LASCO C2/C3 in the
                      Northeast quadrant commencing @ 23:24. As reported by SolarSoft,
                     the CME is associated with a C2.0 class solar flare located at [N08,E88].
                     SDO/AIA 193 shows the solar flare associated with the event starting
                    @ 23:48 UT in the Northeast quadrant.

STEREO BEACON Data
            COR2 A shows a partial HALO CME in the Western hemisphere 03:38 - 04:53.
            Preliminary time/height measure shows 3 points - 457.2 km/sec @ 334 deg.

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/2026/260205/

Best Regards,

--Taylor Lanier

BT
________________________________________________
Soho-halo-alert mailing list
Soho-halo-alert@lists.nasa.gov

SOHO/LASCO C2 Diff	SOHO/LASCO C3 Diff	SDO AIA 193 Angstrom

GOES-19 CCOR-1	SDO AIA 193 Angstrom Diff	STEREO/COR2 AHEAD Diff

SOHO/LASCO C2	SOHO/LASCO C3	GOES-19 SUVI 191 Angstrom