Dark lightning | Wikipedia audio article
Channel: wikipedia tts
Date: 05/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Terrestrial_gamma-ray_flash


00:00:40 1 Discovery
00:02:28 2 Mechanism
00:07:04 3 Conjugate events
00:08:35 4 Other research
00:13:26 5 See also



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Voice name: en-GB-Wavenet-A


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SUMMARY
=======
A terrestrial gamma-ray flash (TGF) is a burst of gamma rays produced in Earth's atmosphere. TGFs have been recorded to last 0.2 to 3.5 milliseconds, and have energies of up to 20 million electronvolts. 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.