A large M3.6 class solar flare occurred near the edge of the Sun on Feb. 24, 2011. The eruption of plasma lasted 90 minutes. Click Continue and view the video.
NASA Goddard posts lots of photos and videos on their Flicker Account which you may find interesting. I messaged the NASA Goddard Twitter Account and asked what the size of this flare was. I may post their response later.
NASA’s SDO Captures a Monster Prominence