SOHO/LASCO Halo CME 20130830

Halo Alert: halo-message.20130830

Subject: SOHO/LASCO HALO CME 130830

UCMEO 93001 30830 1340/
30830 60248 90630 0631/ 062// 333// 41071
30830 60206 80339 14313 11836 1112/
99999

PLAIN

SOHO/LASCO observed an asymmetric HALO CME on August 30, 2013. Event is first
seen in C2 at 02:48 UT as a bright loop over the East. The event expands with extensions
to a full halo by 03:12 UT. The event continues into the C3 field beginning
03:06 to 06:30 UT in progress at last frame before end of contact with SOHO.

Time/height measurements were marked to 2 points in C2 with speeds of 1005.3 Km/sec
at position angle 63 degrees. The event is marked to 8 points in C3. Speeds average
through both fields to 1070.9 Km/sec at PA 63 degrees. Acceleration 0.99 m/sec^2.

SDO/AIA 193A shows a flare of AR 11836 at location [N13, E43] beginning
02:06-03:39 UT. The flare produces a dimming and a wave over the East and
North hemispheres with post loop arcade.

STEREO: BEACON Data
COR2 B, 02:39-05:39 UT expanding partial halo CME over the West.
Preliminary time/height measure gives 1053.2 km/sec velocity at LE.
EUVI B, 01:56-03:06 UT flare with CME over West limb with wave traveling along limb.
COR2 A, 21:54-03:24 UT data gap. In progress at first frame, expanding symmetric halo.
Preliminary time/height measure gives 553.5 km/sec velocity at LE.
EUVI A, n/a.

NOAA reports a long duration C8.2 Xray flare 02:04/02:46/04:06 UT from AR 11836
at location [N13, E43]

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/2013/130830/

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 193A

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

	STEREO/EUVI BEHIND

Time/Height Velocities and Plots

C2/C3

Click on Links below for additional information.

Halo Alert: halo-message.20130830

MPEG Movies

LASCO Software IDL Save Files (.mvi)