This movie shows the sun from late July 8 to early July 10 shortly
before it unleashed an X-class flare beginning at 12:11 PM EDT on July
12 as captured by the Solar Dynamics Observatory. The region responsible
for the flare, Active Region 1520, sits in the lower left part of the
sun. On the right side of the sun, the shimmering loops offer us the
last vision of Active Region 1515.


http://svs.gsfc.nasa.gov/vis/a010000/a011000/a011044/index.html