UCMEO 93001 70919 1430/
70917 61424 82130 3362/ 192// 333// 40799
70917 61345 81745 ///// 12673 1112/
99999

PLAIN

SOHO/LASCO Partial HALO CME September 17 2017

C2 Start Time:  	14:24 UT

C3 Start Time:		15:06 - 21:30 UT 

Type of CME:
Partial HALO CME — BACKSIDE
pa1:  336      pa2:  192      Total Width: 216 degrees

Velocity Measurements:

C2	5 points	786.6 km/sec @ PA 134
C3	8 points	808 km/sec @ PA 134
Average through both fields: 	799.8 km/sec @ PA 134 Acceleration: 1.80 m/sec^2

STEREO-A COR2 14:39-16:39 UT Partial HALO seen in COR2.
	3 points 1060 km/sec @ PA 117 Acceleration: 

COMMENT:   	STEREO AHEAD 195 BEACON data shows a flare on disk from 
			AR 12673 at location [S11, E169] at 13:45 - 17:45 UT. 
			 A dimming and an EUV wave is seen transitioning from 
			the AR in the South East quadrant.

Preliminary UCMEO velocity and position measurements will be delivered first. 
Images, movies, and time/height information for this event will be available at: 
https://umbra.nascom.nasa.gov/lasco/observations/halo/2017/170917b/


Best Regards

—Nick Padgett

BT