timex (timex) wrote,
timex
timex

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X2

‎"FIRST X-FLARE OF THE NEW SOLAR CYCLE: Earth-orbiting satellites detected an X2-class solar flare at 0156 UT on Feb. 15th. This is the most powerful solar flare in nearly five years, and the first X-flare of Solar Cycle 24. The source was behemoth sunspot 1158."

http://www.n3kl.org/sun/noaa.html
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