Pick of The Week
 
 

CMEs - Two for One (October 2, 2002)

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  • Two coronal mass ejections (CMEs) were observed by SOHO's LASCO C2 instrument on 27 September 2002. In close sequence, two CMEs blasted out from the Sun within hours of each other (at the ten o'clock and seven o'clock positions). Though not particularly strong or large, these are not often seen so close together in time. CMEs eject a billion tons of particles traveling one to two millions of miles an hour. The dark disk blocks the Sun so that the LASCO instrument can observe the structures of the corona in visible light - structures a billion times fainter than the disk of the Sun. The CMEs did not appear to be Earth-directed.

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