September 28, 2011

SDO Captures X1.9 Solar Flare

Behemoth sunspot 1302 unleashes a strong flare on 09.24.11–an X1.9-category blast at 5:40 am EDT. NASA’s Solar Dynamics Observatory (SDO) recorded the extreme ultraviolet flash in composite wavelength (211, 193, 171 angstrom).  credit:  NASA

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