Subject: SOHO/LASCO HALO CME 140910 UCMEO 93001 40910 2330/ 40910 61800 82230 1601/ 159// 233// 41425 41024 61721 81748 10514 12158 1112/ 99999 PLAIN SOHO/LASCO observed an asymmetric HALO CME on September 10, 2014. Event is first seen in C2 at 18:00 UT as a bright HALO CME at first frame. The event continues into the C3 field beginning 18:06 to 22:30 UT where it leaves the FOV at 30Rsun. Increased proton flux is seen in the LASCO images. Time/height measurements were marked at 3 positions: 160 degrees: C2: 2 points 1799.7 km/sec C3: 7 points 1380.3 km/sec AVG: 1425.3 km/sec Acceleration: ***** 318 degrees: C2: 3 points 1340.8 km/sec C3: 12 points 1175.0 km/sec AVG: 1196.6 km/sec Acceleration -36.11 m/sec^2 335 degrees: C2: 2 points 1416.5 km/sec C3: 12 points 1193.5 km/sec AVG: 1209.0 km/sec Acceleration -29.13 m/sec^2 SDO/AIA 193A shows a flare with emission at location [N14, E05] from AR 12158 beginning 17:21-18:30 UT. The CME produces a dimming and a wave spanning the disk. STEREO: BEACON Data COR2 A, n/a. EUVI A, n/a. COR2 B, 17:54-20:24 UT; shows an asymetric HALO CME. Preliminary time/height measure gives 1218.6 km/sec velocity at LE. EUVI B, 17:36-18:40 UT EUVI shows material along the limb at all positions in difference. NOAA reports a LDE X1.6 class Xray flare 17:21/17:45/18:20 UT from AR 12158. 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/2014/140910/ Best regards, Kevin Schenk Solar Heliospheric Observatory EIT and LASCO Operations NASA-Goddard Space Flight Center, USA BT