Opinions on Terrestrial gamma-ray flash

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For gamma-ray bursts of cosmic origin, see Gamma-ray burst.

Terrestrial gamma-ray flashes (TGFs) are bursts of gamma rays produced in the Earth's atmosphere. TGFs have been recorded to last 0.2 to 3.5 milliseconds, and have energies of up to 20 MeV. It is speculated that TGFs are caused by intense electric fields produced above or inside thunderstorms. Scientists have also detected energetic positrons and electrons produced by terrestrial gamma-ray flashes.

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