Physicists: "Dark lightning" may be "a potential threat to aeroplane passengers"

From Physics World, under the headline "Dark lightning sheds light on gamma-ray mystery," runs a story that should be of interests to aviation in general, rather than passengers alone. An excerpt: "Called 'dark lightning', the effect is silent, invisible to the eye and a potential threat to aeroplane passengers – at least according to the researchers' models. This is because such lightning has the potential to produce intense terrestrial gamma-ray flashes (TGFs) and… (physicsworld.com) Mais...