SOHO/LASCO Partial HALO CME 130405 BACKSIDED

UCMEO 93001 30405 2030/
30405 60636 81518 3472/ 187// 333// 40597
30405 60603 80656 ///// ///// 1112/
99999

PLAIN

SOHO/LASCO observed a partial HALO CME on April 05, 2013.  Event is
first seen in C2 beginning 06:36 UT with a bright loop over the East.
The event expands with extensions PA 347-187 degrees for total coverage
of 200 degrees in width.  The event continues into the C3 field
beginning 07:30-15:18 UT where it leaves the field of view in the East.

Time/height measurements were marked at 5 points in C2 with speeds of
481.6 Km/sec at PA 81 degrees. The event is marked to 12 points in C3.  
Speeds average through both fields to 596.5 Km/sec at PA 81 degrees.
Acceleration 14.95 m/sec^2. 

SDO AIA 193 shows backside emission 06:03-07:15 UT with material
over the East. 

STEREO: BEACON data
COR2 B, 07:24-12:24 UT, asymmetric halo cme over the west.
Preliminary time/height measure gives 535.7 km/sec velocity at LE.
EUVI B 195, 06:06-06:56 UT flare of AR on disk at location [N19, E111].
The flare produces a dimming and a wave with a bright post arcade.
COR2 A, 07:39-11:24 UT, expanding partial HALO over the west with cavity
and core.
Preliminary time/height measure gives 583.4 km/sec velocity at LE.
EUVI A 195, A cme from behind the NW limb beginning at 06:25 UT.

The observation of this event is considered 'GOOD'. This CME is determined BACKSIDED.
 
Images and movies and time/height information for this event is available on the web at:

http://umbra.nascom.nasa.gov/lasco/observations/halo/2013/130405/

Best regards,

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

BT