SOHO/LASCO HALO CME 110604a BACKSIDED

UCMEO 93001 11208 1430/
10604 70842 91054 2912/ 290// 333// 31372
10604 60620 80750 ///// 11219 1112/
99999

PLAIN

SOHO/LASCO observed a HALO CME on June 4, 2011.  Event is
first seen in C2 at 08:24 UT in progress with lead edge having already
exited the C2 field in first frame. The event continues into the C3 field
beginning 08:42-10:54 UT to 28 Rsun at last image while event is still in progress.

Time/height measurements were marked at 3 points in C3 with speeds of 1371.9 Km/sec
at position angle 291 degrees. 

STEREO: Beacon data
COR2 B,  (in progress) 07:24-09:24 UT asymmetric halo cme to east field.  
Preliminary height/time measure was taken to 4 pts on COR2 B beacon data showing 1066.1 km/sec.
EUVI B 195, 06:23-07:48 UT, cme behind east limb.
COR2 A, 06:54-09:24 UT asymmetric halo cme west.
Preliminary height/time measure was taken to 4 pts on COR2 A beacon data showing 1474.8 km/sec.
EUVI A 195, 06:20-07:50 UT, cme from AR near west limb above equator (AR 11219?) with wave over
the west hemisphere.

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/2011/110604a/

Best regards,

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

BT