SMM C/P CME Event

August 16, 1989 --- Day of Year (DOY): 228

Event Description

Wide, complex, structured, multiple loops/cavities with complex, structured, twisted core superposed on faint structures. Bright structured, narrow loop/cavity (prominence?) from 01:52 to <05:14. Region is disrupted. Big deflections. Slow brightening and swelling of material for ~16 hours prior to event. Solar north is toward the upper left as indicated by the arrow drawn into the occulting disk; the dotted circle marks the solar photosphere.

Event Properties

Start/Stop Times in SMM Coronagraph Field of View: August 16 01:28 to ~05:22
Central Position Angle: 257 degrees
Width (in degrees): 055 degrees
Speed (in km/sec): 056 <--- Inner Loop (prominence?)

Image List:

August 16, 1989: 00:28 UT SOUTH

August 16, 1989: 00:45 UT WEST

August 16, 1989: 01:28 UT WEST August 16, 1989: 01:52 UT WEST

August 16, 1989: 02:01 UT SOUTH August 16, 1989: 02:17 UT WEST

August 16, 1989: 05:14 UT WEST August 16, 1989: 05:22 UT SOUTH

August 16, 1989: 06:54 UT SOUTH

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