Three Hours, Two CMEs, One Good Show (January 22, 2003)
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In a compact time frame of about three hours on 20 January
2003, SOHO observed two coronal mass ejections (CMEs), both
of which appear to have derived from eruptive prominences,
called filaments if seen against the Sun. Both events are shown
in the same video clip in the extreme ultraviolet wavelength of
EIT 195Å. The first filament (labeled one in the still) seems to
gather some energy near the its right end as it begins to lift up
and break away at about 17:00 UT, leaving behind a long
half-pipe of bright loops, thought to be the telltale signs of the
reconnection of magnetic fields ripped open by the CME. The
second, more substantial lift-off occurs more quickly over on
the left side of the Sun where, again, an elongated filament
erupts and quickly breaks away from the Sun at about 20:48
UT. Many CMEs are associated with erupting prominences, but
it is a rarity to capture them so close together in time.|
Both of the CMEs can be seen in the video clip taken by the LASCO C3 instrument for a similar time period, somewhat overlapping. As of 7:00 UT the following day, the second CME is still seen expanding in the instrument's field of view of 30 solar radii.
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.
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