UCMEO 93001 805104 1930/
80503 61700 80542 0832/ 082// 323// 40468
80503 61558 81638 ///// 12706 1112/
99999

PLAIN


SOHO/LASCO  HALO CME May 03, 2018  

C2 Start Time:   17:00 UT

C3 Start Time: 17:42 - 05:42 UT  

Type of CME:
Asymmetric HALO CME — BACKSIDE
pa1:  83      pa2:  82       Total Width:  360 degrees

Velocity Measurements:

C2 5 points  680.4 km/sec @ PA 83 degrees
C3 10 points 464.1 km/sec @ PA 84 degrees  
Average through both fields:   486.4 km/sec  Acceleration: -17.94   

COMMENT: STEREO Ahead EUVI 195 shows a flare of AR12706
	at 15:58-16:38 UT centered at location [N03, E155].
	The event produces an EUV wave and a dimming over the 
	East hemisphere, followed by a post loop arcade.  

	STEREO Beacon Data
	COR2 A shows a loop event over the East 17:24-21:24 UT.
  	Preliminary time/height measure gives 594.8 km/sec @ 85 degrees.
 
 
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/2018/180503/


Best Regards,

--Kevin Schenk

BT

[Images from original message are omitted here]

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