A tsunami on the surface of the sun.

BBC has video footage taken by NASA’s SDO (Solar Dynamics Observatory) and Japan’s Hinode spacecraft, two satellites that have just filmed a tsunami on the surface of the sun:

Two Earth-orbiting satellites have caught sight of speeding “tsunami” on the surface of the Sun after an event called a coronal mass ejection (CME).

These waves of heightened magnetic field and hot, ionised gas race across the Sun at about 400km per second.

The chance sighting, to be published in Solar Physics, allowed researchers to measure the magnetic field in “quiet” areas away from the CME.

You can see the imagery at the link. It’s in the ultraviolet band, so not quite as fiery *looking* as you might expect. You just have to picture what it indicates.

More information on the event, technically known as an “EIT wave,” is up on Wired.co.uk.