One Day: Six Coronal Mass Ejections (September 23, 2011)
The Sun set off a series of coronal mass ejections (CMEs) in a little over one day (Sept. 19-20, 2011), an indication of a level of activity we have not seen earlier in this solar cycle. Most were not headed towards Earth, though one of them may deliver a glancing blow in a few days. The images were taken by SOHO's C3 (blue) and the narrower field of view C2 (red) coronagraphs in which the occulting disk blocks the Sun (represented by the white circle), so we can discern fainter features in the Sun's corona. The bright object entering the field of view towards the end of the C3 movie (top right) is Mercury.
SOHO began its Weekly Pick some time after sending a weekly image or video clip to the American Museum of Natural History (Rose Center) in New York City. There, the SOHO Weekly Pick is displayed with some annotations on a large plasma display.
If your institution would also like to receive the same Weekly Pick from us for display (usually in Photoshop or QuickTime format), please send your inquiry to firstname.lastname@example.org.