SOHO/LASCO HALO CME 120202 BACKSIDED

UCMEO 93001 20202 2030/
20202 61424 81506 0142/ 013// 323// 30619
20202 61345 81450 ///// ///// 1112/
99999

PLAIN

SOHO/LASCO observed a HALO CME on February 02, 2012.  Event is
first seen in C2 at 14:24 UT as a loop over the north pole.
The loop expands with extensions to a full halo by 15:12 UT.
The event continues into the C3 field beginning 15:306-23:54 UT
as it leaves the C3 field at 30 Rsun in the North.

Time/height measurements were marked at 5 points in C2 with speeds of 643.6 Km/sec
at position angle 14 degrees. The event is marked to 10 points in C3.  Speeds
average through both fields to 618.9 Km/sec at PA 14 degrees. Acceleration of
-18.75 m/sec^2. 

SDO AIA: n/a
STEREO: Beacon data
COR2 A, 14:24 UT burst in north and west hemispheres.
EUVI A 195, 13:45-14:50 UT a flare ofAR near NW limb, cme with dimming and small wave.
COR2 B, 14:39 UT expanding loop over the North East hemisphere.
EUVI B 195, CME over East limb at 13:51-14:46 UT with post loops surfacing.
EUVI B 304, 10:57-14:57 UT, filament material elevates and channel erupts.  Region
is on disk in north hemisphere at central meridian.


The observation of this event is considered 'FAIR'. This CME is determined a BACKSIDED 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/2012/120202/

Best regards,

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

BT