Astronomers have captured the "first" movie of a solar “tsunami” in the Sun’s atmosphere .
It was glimpsed by Nasa’s STEREO spacecraft . STEREO mission consist of two spacecrafts revolving around the Sun to reveal it's 3D image.
Tsunami on the Sun is a wave of pressure that sweeps across the Sun. It is induced by a huge explosion near or on the surface of the Sun, such as a coronal mass ejection or flare, which causes a pressure to propagate outwards in a circular pattern.
BBC
http://news.bbc.co.uk/2/hi/science/nature/7326097.stm
http://www.sciencecentric.com/news/08040235.htm
This picture is From the picture of the day: 2006 December 13 http://apod.nasa.gov/apod/ap061213.html
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