Subject: SOHO/LASCO Partial HALO CME 140305a BACKSIDED

UCMEO 93001 40305 1830/
40305 60924 91106 3462/ 258// 123// 40605
40305 60705 81005 ///// ///// 2212/
99999

PLAIN

SOHO/LASCO observed a partial HALO CME [A] on March 5, 2014.
Event is first seen in C2 beginning 09:24 UT with a loop over the South.
The event expands with extensions PA 346 - 258 degrees for a total width
of 272 degrees wide.  The event continues into the C3 field beginning
09:54-11:06 UT at last frame in progress.

Time/height measurements were marked at 7 points in C2 with speeds of
518.5 Km/sec at PA 119 degrees. The event is marked to 5 points in C3.  
Speeds average through both fields to 605.2 Km/sec at PA 119 degrees.
Acceleration 84.49 m/sec^2. 


STEREO: BEACON data
COR2 B,  09:40-12:40 UT asymmetric halo over the South.
Preliminary time/height measure gives 927.4 km/sec velocity at LE.
EUVI B 195, 07:06-10:05 UT eruptive filament on disk near central
meridian in the South at location [S25, E170].
The event produces a dimming followed by a post arcade.
COR2 A, 09:08-12:24 UT, expanding asymmetric HALO over the SW. 
Preliminary time/height measure gives 733.5 km/sec velocity at LE.
EUVI A 195, 07:05-10:05 UT eruptive filament on disk in SW.


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/2014/140305a/

Best regards,

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

BT