UCMEO 93001 903120 2030/
90320 61148 91618 2161/ 045// 123// 40562
80320 61051 81130 42609 12736 1112/
99999

PLAIN


SOHO/LASCO  Partial HALO CME March 20, 2019  

C2 Start Time:  	1148 UT

C3 Start Time:		12:42 - 16:18 UT   

Type of CME:
Asymmetric HALO CME — FRONTSIDE
pa1:  216      pa2:  045       Total Width:  189 degrees

Velocity Measurements:

C2	5 points	 0554.8 km/sec @ PA 306
C3	4 points	 0586.4 km/sec @ PA 306  
Average through both fields: 	 0562.1 km/sec  Acceleration: 9.03 m/sec^2.   

COMMENT:   	AIA 193 shows a flare of AR 12736 at location [N09, W26] 
			10:51-11:30 UT.  The event produces an EUV wave and a dimming
			in the Northwest quadrant, followed by a small post loop arcade.
			There was an earlier emission in AIA beginning 07:25 UT.  It also
			produced minimal EUV wave.  There is the possibility of this also
			adding to the CME seen in LASCO.   
			

			STEREO Beacon Data
			COR2 A, 11:39 - 15:39 UT; shows a CME from the West.
			Preliminary time/height measure gives 0620.5 km/sec @ 295 degrees.
						
NOAA/GOES reports a C4.8 class X-ray flare of AR12736 10:35/11:18/11:34 UT.		
			
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/2019/190320/


Best Regards,

--Kevin Schenk

BT