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Giant sunspot emits powerful bursts

sunspotQuiet sunspot AR2529 was not so quiet. The active region in the form of heart erupted April 18 (00:39 UT), producing a strong M6.7-class solar flare.
The pulse of UV radiation from the flash is ionized in the Earth’s upper atmosphere. These, in turn, violate shortwave radio. The sailors, airmen and amateurs around the Pacific Ocean might have noticed the interruption of signals at frequencies below about 15 MHz. Read the rest of this entry »

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Posted by on April 18, 2016 in Galaxy, Planet


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