The Science at NASA video ScienceCasts: Dark Lightning describes observation of gamma rays from Earth by the Fermi Gamma-ray Space Telescope.

These gamma rays are associated with weather that produces lightning, but the actual mechanism for gamma ray production by weather was still uncertain at the time.

The video explains that a discharge mechanism called "Dark Lightning" might produce the gamma rays without producing the same visible light signatures that normal lightning produces.

Question: Did Dark Lightning turn out to be a real thing? Is this what produces gamma ray flashes from lightning storms?

Screen shot from the video shows a graphic of a booklet with the following words on its cover:

AGU Fall Meeting, San Francisco, 3-7 December 2012

AGU Fall Meeting, San Francisco, 3-7 December 2012


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