The sun is constantly active, check out this Magnetic Filament erupt on the surface of our Sun. The links lead to videos of the event in action.

Wired Science

The loop of hot plasma has been snaking around the sun’s southeast limb since Dec. 4, and appears to be growing by the hour. When SDO saw it on Dec. 4, the filament was more than 250,000 miles long, about 30 times the diameter of the Earth. In the image below, taken at about 12:30 p.m. EST on Dec. 6, the loop of charged plasma stretches more than 435,000 miles, the full radius of the sun.