Subject: SOHO/LASCO Partial HALO CME 131022

UCMEO 93001 31022 1700/
31022 60424 81142 2981/ 137// 323// 40556
31022 60115 80518 10837 ///// 2212/
99999

PLAIN

SOHO/LASCO observed a Partial HALO CME on October 22, 2013.  Event is first seen
in C2 at 04:24 UT as a loop with cavity and core in the North and East. The front
expands with extensions PA 298-137 degrees for total coverage of 199 degrees in width.
The event continues into the C3 field beginning 05:18 to 11:42 UT leaving the C3
field of view at 30Rsun in the North. 

Time/height measurements were marked to 6 points in C2 with speeds of 491.1 Km/sec
at position angle 0 degrees. The event is marked to 11 points in C3.  Speeds average
through both fields to 555.9 Km/sec at PA 350 degrees.  Acceleration 42.75 m/sec^22s.


SDO/AIA 193 shows a filament channel center located [N37, E08] with activation beginning
10/21 18:00 UT.  The filament becomes eruptive 01:15-05:18 UT with a dimming of the area.
AIA 304 shows the eruption with a large loop and flaring of the channel on disk. 

STEREO: BEACON Data
COR2 A, 05:39-08:54 UT. Partial halo, expanding loops over the East and North hemisphere.
Preliminary time/height measure gives 651.4 km/sec velocity at LE. 
EUVI A, n/a
COR2 B, 04:40-09:25 UT. large expanding loop over the North and West hemispheres.
Preliminary time/height measure gives 431.3 km/sec velocity at LE.  
EUVI B, n/a

   
The observation of this event is considered 'GOOD'. This CME is determined a FRONTSIDED event.

Images and movies and time/height information for this event is available on the web at:

http://umbra.nascom.nasa.gov/lasco/observations/halo/2013/131022/

Best regards,

Kevin Schenk
Solar Heliospheric Observatory
EIT and LASCO Operations
NASA-Goddard Space Flight Center, USA

BT