UCMEO 93001 01208 0215/
01207 61624 82154 1921/ 191// 123// 41241
01207 61548 81709 30825 12790 1112/
99999

PLAIN


SOHO/LASCO   HALO CME DECEMBER 07, 2020  

C2 Start Time:  	16:24 UT

C3 Start Time:		16:42 - 21:54 UT   

Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1:  192      pa2:  191       Total Width:  360 degrees

Velocity Measurements:

C2	3 points	 1125.0 km/sec @ PA 192
C3	9 points	 1221.3 km/sec @ PA 192  
Average through both fields: 	 1240.8 km/sec  Acceleration: -18.54 m/sec^2.   

COMMENT:  SDO AIA 193 shows a long duration flare from AR 12790 
	  15:48-17:09 UT at location [S25, W08] .  The flare produces 
	  a dimming of the area and a wave that propagates across the disk. 
			
	  STEREO Beacon Data
	  COR2 A, 15:54 - 17:54 UT; shows a loop CME over the SouthWest.
	  Preliminary time/height measure gives 1537.2 km/sec @ 228 degrees.
								
			
Preliminary UCMEO velocity and position measurements are delivered first. 
Images, movies, and time/height information for this event will soon be available at: 

https://umbra.nascom.nasa.gov/lasco/observations/halo/2020/201207/


Best Regards,

--Kevin Schenk

BT