Extreme Space Weather|
|posted: Feb 17, 2011 - 14:30UT - 15:30LT|
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|These are images of the solar corona by the SECCHI outer Heliospheric Imager (HI-2) on the STEREO Behind Observatory.
They are produced with the beacon data, i.e. the image quality is far lower than in the final science product.|
Based on these images, we estimate the speed of the shockfront to be 500 km/s.