Subject: SOHO/LASCO HALO CME 140130

UCMEO 93001 40130 1730/
40130 60824 91530 1051/ 104// 333// 40604
40130 60742 80815 25212 11967 1112/
99999

PLAIN

SOHO/LASCO observed an asymmetric HALO CME on January 30, 2014.  Event is first
seen in C2 at 08:24 UT as an expanding loop over the Southeast.  The event expands
with extensions to a full halo by 09:36 UT. The event continues into the C3 field
beginning 09:06 to 15:30 UT at last frame in progress to 19.6Rsun. 

Time/height measurements were marked to 5 points in C2 with speeds of 593.8 Km/sec
at position angle 105 degrees. The event is marked to 87 points in C3.  Speeds average
through both fields to 604.3 Km/sec at PA 105 degrees.  Acceleration -02.41 m/sec^2.


SDO/AIA 193 shows material activated 07:27-09:18 UT at location [S36, E62]
South of the AR11967 on disk in the East with emission.  A flare of AR11967
is seen from location [S12, E52] 07:42-08:15 UT.  A dimming and wave is seen
around and to the South of the flare area. 

STEREO: BEACON Data
COR2 A, 08:54-14:24 UT expanding asymmetric halo at last frame.
Preliminary time/height measure gives 678.5 km/sec velocity at LE. 
EUVI A, n/a
COR2 B, 08:40-13:40 UT expanding loop CME over the West and South.  
EUVI B,  0756-08:26 UT CME seen from behind the West limb.

NOAA reports a M1.1 Xray flare 07:54/08:11/08:41 UT from AR 11967
at location [S12, E52].  

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/2014/140130/

Best regards,

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

BT