SMM C/P CME Event
17-18 February 1989 --- Day of Year (DOY): 48-49
Two coronal mass ejections were recorded by the SMM Coronagraph on February 17, 1989. This sequence of four images shows the two ejections. The upper two panels contain images of the ejection that was first seen at 14:22 UT. The lower two panels are images of the second ejection that was first recorded at 21:08 UT and continued through the early hours of February 18. Both events occurred over the east limb; solar north points toward the upper left in each image.
Event Description
EVENT #1:
Multiple(?), concentric loops/cavities and core superposed on streamer.
`Light-bulb' shape at 15:55. Streamer is blown out.
EVENT #2:
Streamers expand slowly and develop a mound-shaped front.
Highly structured, bright, knotty (prominence) material follows
from 02:49 to 07:38.
Knotty material extends as far north at ~100 degrees at 3.0 solar radii.
Streamers are blown out. Big deflections.
Event Properties
EVENT #1:
Start/Stop Times in SMM Coronagraph Field of View:
February 17 14:22 to 19:02
Central Position Angle: 105 degrees
Width (in degrees): 050 degrees
Speed (in km/sec): 236 <--- Loop
Speed (in km/sec): 236 <--- Cavity
EVENT #2:
Start/Stop Times in SMM Coronagraph Field of View:
February 17 ~21:08 to February 18 08:11
Central Position Angle: ~147 degrees
Width (in degrees): ~039 degrees
Speed (in km/sec): 059 <--- Inner material (prominence)
Image List:
February 17-18, 1989: 4 pictures
February 17, 1989: 14:22 UT
February 17, 1989: 15:55 UT
February 17, 1989: 17:29 UT
February 17, 1989: 19:02 UT
February 17, 1989: 23:42 UT
February 18, 1989: 01:16 UT
February 18, 1989: 02:49 UT
February 18, 1989: 03:22 UT
February 18, 1989: 04:23 UT
February 18, 1989: 04:47 UT
February 18, 1989: 07:21 UT
February 18, 1989: 08:11 UT
February 18, 1989: 09:28 UT
February 18, 1989: 09:45 UT
Detailed information on all SMM mass ejections is available in the SMM Catalogue of Coronal Mass Ejections