SOHO/LASCO Halo CME 20170910

Halo Alert: halo-message.20170910

UCMEO 93001 70911 1739/
70910 61600 81818 2531/ 252// 333// 33288
70910 61545 81651 38808 12673 1112/
99999

PLAIN

SOHO/LASCO HALO CME September 10, 2017

C2 Start Time:   16:00 UT

C3 Start Time: 16:06 - 18:18 UT

Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1: 253      pa2: 252       Total Width: 360 degrees

Velocity Measurements:

C2 1 points ****.* km/sec @ PA 253
C3 5 points 3212.4 km/sec @ PA 253
Average through both fields:   3287.6 km/sec Acceleration:

COMMENT:   AIA 193 shows a long duration (LDE) impulsive flare event
              of AR 12673 at location [S08, W88] beginning 15:45 - 16:51 UT.
              The event produces an EUV wave and a dimming across the disk,
              followed by a post loop arcade.

            LASCO shows extreme proton flux in the field of view (SEP).

            STEREO Beacon Data
            COR2 A, in progress 16:24 - 16:40 UT; shows an asymmetric HALO CME
            Preliminary time/height measure gives 2630.4 km/sec @ 110 degrees.

NOAA/GOES reports a X8.2 class X-ray flare of AR12673 15:35/16:06/16:31 UT.
NOAA/GOES shows an increase in proton particles with flux >100 MeV
            and surpasses solar storm threshold conditions.


Preliminary UCMEO velocity and position measurements will be delivered first.
Images, movies, and time/height information for this event will be available at:

http://umbra.nascom.nasa.gov/lasco/observations/halo/2017/170910/

Best Regards,

--Nick Padgett

BT

[Images from original message are omitted here]

________________________________________________
Soho-halo-alert mailing list
Soho-halo-alert@mail.nascom.nasa.gov
https://mail.nascom.nasa.gov/mailman/listinfo/soho-halo-alert