Subject: SOHO/LASCO Partial HALO CME 120210 UCMEO 93001 20212 1830/ 20210 62000 80406 3481/ 202// 323// 40547 20210 618433 82048 11531 ///// 2212/ 99999 PLAIN SOHO/LASCO observed a Partial HALO CME on February 10, 2012. Event is first seen in C2 at 20:00 UT as a loop event on the northeast centered at pa 45 degrees. The event develops a defined loop with cavity and core. The front expands with extensions PA 348-202 degrees for total coverage of 214 degrees in width. The event continues into the C3 field beginning 21:18 to 04:06 UT out to 24 Rsun as it dissipates in the NE. Time/height measurements were marked to 10 points in C2 with speeds of 462.3 Km/sec at position angle 34 degrees. The event is marked to 11 points in C3 where it slightly accelerates. Speeds average through both fields to 546.6 Km/sec at PA 34 degrees. Acceleration 7.97 m/sec^s. SDO/AIA 193 and 304 shows elevated filament located at [N31,E15] erupting beginning 18:33-20:48 UT with post loop arcade. STEREO: Beacon data COR2 B, 18:55-20:40 UT data gap. Beginning 20:40 UT a bright loop CME with cavity and core over the west. Preliminary time/height measure gives 617.6 km/sec velocity at LE. EUVI B, 18:56-20:26 UT data gap. Elevated prominence on NE limb, begins to lift off at 18:06 UT. COR2 A, 18:54-20:24 UT data gap. Beginning 20:20:24 UT bright loop CME event expanding over the east hemisphere. Preliminary time/height measure gives 538.7 km/sec velocity at LE. EUVI A, 22:05-05:55 UT data gap. The observation of this event is considered 'GOOD'. This CME is determined a FRONTSIDED 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/2012/120210/ Best regards, Kevin Schenk Solar Heliospheric Observatory EIT and LASCO Operations NASA-Goddard Space Flight Center, USA BT