Big Sunspot 1520 Releases X1.4 Class Flare by NASA

An X1.4 class flare erupted from the center of the sun, peaking on July 12, 2012 at 12:52 PM EDT. It erupted from Active Region 1520 which rotated into view on July 6.

This video uses SDO AIA footage in 131(teal), 171(gold) and 335 (blue) angstrom wavelengths. Each wavelength shows different temperature plasma in the sun's atmosphere. 171 shows 600,000 Kelvin plasma, 335 shows 2.5 million Kelvin plasma, and 131 shows 10 million Kelvin plasma.

The final shot is a composite of 171 and 335 angstrom footage.