SMM C/P CME Event
18 March 1989 --- Day of Year (DOY): 077
The SMM Coronagraph recorded three mass ejections on March 18, 1989. The last of these is illustrated in the four images shown above. This event involved a broad loop with an inner core ejected over the west limb. The earlier events occurred over the southwest and east limbs. Images from the southwest and west limb events are included below. Solar north is toward the upper left in each image.
EVENT #1: Southwest
Loop/cavity with highly structured, inner (prominence) loop/cavity in streamer. Streamer is blown out. Deflections.
EVENT #2: West
Big loop/cavity and amorphous core superposed on streamer. Big deflections. Streamer is blown out.
Start/Stop Times in SMM Coronagraph Field of View: March 18 02:53 to 06:49
Central Position Angle: 230 degrees
Width (in degrees): 062 degrees
Speed (in km/sec): 740 <--- Outer Loop
Speed (in km/sec): 514 <--- Inner Loop (prominence)
Start/Stop Times in SMM Coronagraph Field of View: March 18 18:26 to March 19 04:27
Central Position Angle: 283 degrees
Width (in degrees): 061 degrees
Speed (in km/sec): 333 <--- Outer Loop
Speed (in km/sec): 439 <--- Cavity
March 18, 1989: 00:28 UT
Detailed information on all SMM mass ejections is available in the SMM Catalogue of Coronal Mass Ejections