Speedy tsunami seen on Sun's surface

Two satellites have seen "tsunami" spreading on the surface of the Sun after a release of matter into space called a coronal mass ejection (CME). These tsunami of heightened magnetic field and hot, ionised gas race across the Sun at about 400km per second. via Pocket http://www.bbc.co.uk/news/science-environment-23241896#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa