SOHO/LASCO HALO CME 121027 UCMEO 93001 21129 2050/ 21027 61624 80506 2731/ 272// 123// 40335 21027 61333 81733 43517 11596 2212/ 99999 PLAIN SOHO/LASCO observed a HALO CME on October 27, 2012. Event is first seen in C2 beginning 16:24 UT with a multi loop over the West. The event expands to a full HALO CME by 20:12 UT. The event continues into the C3 field beginning 17:06-05:06 UT out to 21 Rsun where it dissipates. Time/height measurements were marked at 12 points in C2 with speeds of 209.8 Km/sec at pa 270 degrees. The event is marked to 5 points in C3. Speeds average through both fields to 334.6 Km/sec at PA 273 degrees. Acceleration -61.58 m/sec^2. SDO AIA 193 shows an activated filament eruption 13:33-17:33 UT located [N17,W35]. A dimming is seen in the NW quadrant around AR11596 which is located [N08, W35]. SDO AIA 304 shows flaring of this event along the filament channel in the NW. STEREO: HR data COR2 A, 16:24 UT, an expanding multi-loop burst over the East hemisphere. Preliminary time/height measure gives 287.4 km/sec velocity at LE. EUVI A 195, n/a COR2 B, 16:54 UT, an expanding multi-loop over the NW hemisphere. Preliminary time/height measure gives 317.5 km/sec velocity at LE. EUVI A 195, n/a 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/2012/121027/ Best regards, Kevin Schenk Solar Heliospheric Observatory EIT and LASCO Operations NASA-Goddard Space Flight Center, USA BT