A large active region erupts with a mid-level flare, an M6.6-class, in this image from NASA's SDO on the night of Oct. 27, 2014.
A large active region erupts with a mid-level flare, an M6.6-class, in this image from NASA’s Solar Dynamics Observatory, or SDO, on the night of Oct. 27, 2014. The region will soon rotate over the right horizon of the sun and will no longer be facing Earth. Credit: NASA/SDO