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Starting at the top left and going clockwise, you can see the size of each of the four most recent solar flares.
NASA's Solar Dynamics Observatory took these images of the same X3.2-class flare from that erupted on May 13. NASA described the images:
"Starting in the upper left and going clockwise, the images show light in the 304-, 335-, 193-, and 131-angstrom wavelengths. By looking at the sun in different wavelengths, scientists can view solar material at different temperatures, and thus learn more about what causes flares."
X-class solar flares
Here are the first three X-class solar flares that were launched in under 24 hours on May 12-13.