SOHO/LASCO Halo CME 20121027

Halo Alert: halo-message.20121027

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

SOHO/LASCO C2 Diff	SOHO/LASCO C3 Diff	SDO/AIA 304A

STEREO/COR2 BEHIND	SDO/AIA 193 Diff	STEREO/COR2 AHEAD

SDO/AIA 193	SDO/AIA 193

Time/Height Velocities and Plots

C2/C3

Click on Links below for additional information.

Halo Alert: halo-message.20121027

MPEG Movies

LASCO Software IDL Save Files (.mvi)