SMM C/P CME Event

14 April 1980 --- Day of Year (DOY): 105

A 4-image time sequence (north sector) taken by SMM on April 14, 1980 shows the outer and inner loops of a coronal mass ejection as it expands outward over the north pole of the sun.

Event Description

Archetypal loop/cavity with structured, interior (prominence) loop/cavity. Inner loop emitting in line of h-alpha at 07:18 and 07:21. Event is superposed on rays. Western leg is superposed on streamer. Loop front flattens as it moves out through field of view. Region is blown out. Deflections.

Event Properties

Start/Stop Times in SMM Coronagraph Field of View: April 14 04:49~08:47
Central Position Angle: ~005 degrees
Width (in degrees): ~051
Speed (in km/sec): 409 <--- Outer Loop
Speed (in km/sec): 374 <--- Outer Cavity
Speed (in km/sec): 365 <--- Inner Prominence Loop
Speed (in km/sec): 353 <--- Inner Cavity (below Prominence)

Event Images:

April 14, 1980: 04:04 UT 4-quadrant April 14, 1980: 04:48 UT

April 14, 1980: 04:48 UT 4-quadrant April 14, 1980: 05:44 UT

April 14, 1980: 05:44 UT 4-quadrant April 14, 1980: 05:44, subtract. UT

April 14, 1980: 06:10 UT 4-quadrant April 14, 1980: 06:10 UT

April 14, 1980: 07:09 UT 4-quadrant April 14, 1980: 07:09 UT

April 14, 1980: 08:47 UT 4-quadrant

April 14, 1980: 12:04 UT 4-quadrant

Detailed information on all SMM mass ejections is available in the SMM Catalogue of Coronal Mass Ejections