Before revision: There are various types of TLEs including red sprites, sprite halos, blue jets, and ELVES (an acronym for “ Emission of Light and Very-Low-Frequency perturbations due to Electromagnetic Pulse Sources ” ).Earle R. Williams (November 2001) "Sprites, elves, and glow discharge tubes," Physics Today, 54 (11) : 41-47.
After revision: There are various types of TLEs including red sprites, sprite halos, blue jets, and ELVES (an acronym for " Emission of Light and Very-Low-Frequency perturbations due to Electromagnetic Pulse Sources " ).Earle R. Williams (November 2001) "Sprites, elves, and glow discharge tubes," Physics Today, 54 (11) : 41-47.