NASA dixit:
“A mid-level flare, an M6.5, erupted from the sun on April 2, 2014, peaking at 10:05 a.m. EDT. This video from NASA’s Solar Dynamics Observatory shows the flare in a blend of two wavelengths of extreme ultraviolet light: 171 Angstroms and 304 Angstroms, colorized in yellow and red, respectively.”
Credit: NASA Goddard Space Flight Center
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