Science

Researchers have identified a burst of high-energy radiation known as “dark lightning” immediately preceding a flash of ordinary lightning.

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Researchers have identified a burst of high-energy radiation known as ‘dark lightning” immediately preceding a flash of ordinary lightning. The new finding provides observational evidence that the two phenomena are connected, although the exact nature of the relationship between ordinary bright lightning and the dark variety is still unclear, the scientists said.

Dark lightning is a burst of gamma rays produced during thunderstorms by extremely fast moving electrons colliding with air molecules. Researchers refer to such a burst as a terrestrial gamma ray flash.

([Phys.org](http://phys.org/news/2013-04-scientists-dark-lightning-linked-visible.html))

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“Researchers have identified a burst of high-energy radiation known as “dark lightning” immediately preceding a flash of ordinary lightning.”