On January 22, an M8.7 class flare helped cause the biggest solar storm since 2005. Airplanes had to change routes, and the power grid and satellites were affected. It also caused some of the best auroras ever seen.

This spectacular coronal aurora was captured over Fairbanks, Alaska, recorded from 1:44 to 2:11am local time on January 22, 2012. 
via Gizmodo

Read more, and check out the other six (amazing!) videos here