The Fermi satellite discovered that this phenomenon produces positrons.
The Fermi satellite discovered that this phenomenon produces positrons. Sprites, elves, and blue jets are harder-to-observe variants of this phenomenon, and the positive type of it is more energetic. The initial stage of it is preliminary breakdown followed by the formation of a stepped ladder. Before this phenomenon occurs, the (*) ground sends up a positive "streamer." It is precipitated by charge separation between the ground and a cloud. For 10 points, name this atmospheric phenomenon of electric discharge, often seen in thunderstorms.
The Fermi satellite discovered that this phenomenon produces positrons.
{lightning} [or {lightning strikes}; or other equivalents]