This video clip obtained by SOHO’s EIT instrument, was taken in extreme ultraviolet light and covers about 24 hours. It shows two ‘EIT waves’, a kind of solar storm that blasts out from an active region across a portion of the Sun’s surface.
The two waves originated in the sunspot whose appearing marked the start of the new solar cycle (‘Cycle 24’) on 4 January 2008. The first, smaller wave was observed on 6 January 2008, while a stronger wave was observed the next day.