Subject: SOHO/LASCO HALO CME 140107

UCMEO 93001 40107 2240/
40107 61824 82123 2341/ 233// 333// 42095
40107 61800 81912 31212 11943 1112/
99999

PLAIN

SOHO/LASCO observed an asymmetric HALO CME on January 07, 2014.  Event is first
seen in C2 at 18:24 UT as a bright loop over the Southwest.  The event expands
with extensions to a full halo by 19:36 UT. The event continues into the C3 field
beginning 18:30 to 21:23 UT leaving the C3 field of view at 30Rsun. 

Time/height measurements were marked to 2 points in C2 with speeds of 2353.8 Km/sec
at position angle 234 degrees. The event is marked to 8 points in C3.  Speeds average
through both fields to 2094.5 Km/sec at PA 234 degrees.  Acceleration -40.13 m/sec^2.


SDO/AIA 193 shows a flare of AR 11943 at location [S12, W12] beginning 
18:00-19:12 UT.  The flare produces a dimming and a wave propagating
from the region. AIA 304 shows brightening/flaring of area East of
and adjacent to AR 11943 along transient lines of AR 11944.  

STEREO: BEACON Data
COR2 A, 18:24-19:39 UT expanding partial halo CME over the East.
Preliminary time/height measure gives 2396.2 km/sec velocity at LE. 
EUVI A, n/a
COR2 B, 15:55-20:55 UT data gap. n/a.
EUVI B,  n/a.

NOAA reports a X1.2 Xray flare 18:04/18:34/18:58 UT from AR 11943
at location [S15, W11].  Increased proton flux in +100 MeV with particles
+50 MeV above Solar Storm levels. 

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/2014/140107/

Best regards,

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

BT