Subject: SOHO/LASCO HALO CME 140130b

UCMEO 93001 40131 1330/
40130 61612 82122 1151/ 114// 333// 41272
40130 61551 81703 24313 11967 1112/
99999

PLAIN

SOHO/LASCO observed a second asymmetric HALO CME [B] on January 30, 2014. 
Event is first seen in C2 at 16:12 UT as an expanding loop over the Southeast.
The event expands with extensions to a full halo by 17:24 UT. The event continues
into the C3 field beginning 16:42 to 21:22 UT where it exits the field at 30Rsun. 

Time/height measurements were marked to 3 points in C2 with speeds of 1331.7 Km/sec
at position angle 115 degrees. The event is marked to 8 points in C3.  Speeds average
through both fields to 1271.9 Km/sec at PA 115 degrees.  Acceleration -54.27 m/sec^2.


SDO/AIA 193 shows a flare of AR11967 15:51-17:03 UT at location [S13, E43]
with a dimming and wave across the East and South hemispheres.
AIA 304A shows cooler emission CME beginning at 15:15 UT with ejecta from the
filament at location [S13, E58] East of and adjacent to AR 11967. 

STEREO: BEACON Data
COR2 A, 14:24-21:42 UT data gap. n/a.
EUVI A, n/a
COR2 B, 16:25 UT expanding loop CME over the Southwest. A data gap begins 16:40-18:40 UT.  
EUVI B, 15:26-16:46 UT CME seen from behind the West limb with wave.

NOAA reports a long duration M6.6 Xray flare 15:48/16:04/17:19 UT from AR 11967
at location [S13, E58].  

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/2014/140130b/

Best regards,

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

BT