SOHO/LASCO HALO CME 110604b BACKSIDED

UCMEO 93001 11208 1430/
10604 72205 80025 2912/ 290// 333// 42120
10604 62145 82250 ///// 11219 1112/
99999

PLAIN

SOHO/LASCO observed a second HALO CME on June 4, 2011.  Event is
first seen in C2 at 22:05 UT in progress with lead edge at 3.8 Rsun in first
frame. Event is an asymmetric halo cme by 22:19 UT. The event continues into
the C3 field beginning 22:12-00:25 UT to 230 Rsun.

Time/height measurements were marked at 6 points in C3 with speeds of 2119.6 Km/sec
at position angle 291 degrees.

STEREO: Beacon data
COR2 B,  in progress at 22:05 UT, already to 8.5 Rsun, asymmetric halo east.  
Preliminary height/time measure taken at 3 points showing 2509.1 km/sec.
EUVI B 195, 21:45-22:58 UT. large cme behind east limb with wave over the east
field on disk.
COR2 A, in progress 22:24-22:54 UT, asymmetric halo cme west.
Preliminary height/time measure taken at 2 points showing 2513.1 km/sec.
EUVI A 195, 21:45-22:50 UT long duration flare of AR near west limb with wave
propagating 2/3 of disk from west. (AR 11219?)

The observation of this event is considered 'GOOD'. 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/2011/110604b/

Best regards,

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

BT