SOHO/LASCO HALO CME 120706

UCMEO 93001 20707 0550/
20706 62312 80342 2371/ 236// 323// 41912
20706 62303 82321 35318 11515 1112/
99999

PLAIN

SOHO/LASCO observed a HALO CME on July 06, 2012.  Event is first seen in C2 at
23:12 UT with a bright loop over the SW.  The event expands with faint extensions
to a full halo CME by 00:12 UT.  The event continues into the C3 field beginning
23:30-03:42 UT out to the edge of field at 30 Rsun in the Southwest. Increased
proton flux is seen in the Lasco white light images.

Time/height measurements were marked at 2 points in C2 with speeds of
2207.7 Km/sec at pa 237 degrees. The event is marked to 6 points in C3.  
Speeds average through both fields to 1912.1 Km/sec at PA 237 degrees.
Acceleration n/a. 

SDO AIA 193 shows a flare of AR 11515 23:03-23:21 UT located [S18,W53].
A dimming is seen in the SW quadrant with wave.

STEREO: HR data
COR2 B,  23:24 UT, a partial halo expanding over the south hemisphere.
Preliminary time/height measure gives 1160.2 km/sec velocity at LE.
EUVI B 195, 23:25-23:45 UT cme over limb in the south.
COR2 A, 23:24 UT, an asymmetric halo (west).
Preliminary time/height measure gives 682.0 km/sec velocity at LE.
EUVI A 195, 23:05-23:45 UT flare of AR 11515 on disk in SE with wave over
south and east hemisphere.

NOAA reports an X1.1 Xray flare 23:01-23:14 UT from AR 11515 at location [S18,W50]
GOES13 shows an increase in proton flux with particles >10 MeV climbing in SEP 
storm threshold conditions. 

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

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

http://umbra.nascom.nasa.gov/lasco/observations/halo/2012/120706/

Best regards,

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

BT