About a thousand instances a day, thunderstorms hearth off fleeting bursts of a few of the highest-energy mild naturally discovered on Earth.

These occasions, referred to as terrestrial gamma-ray flashes (TGFs), final lower than a millisecond and produce gamma rays with tens of hundreds of thousands of instances the power of seen mild.

Since its launch in 2008, NASA’s Fermi Gamma-ray Space Telescope has recorded greater than four,000 TGFs, which scientists are learning to higher perceive how the phenomenon pertains to lightning exercise, storm energy and the life cycle of storms.