Lightning: Transient luminous events (TLEs)

(Section 3.2.4.1.1)

Short-lived luminous electrical manifestations formed in the upper regions of the atmosphere above large thunderstorms.

Large thunderclouds are capable of producing electrical phenomena high in the atmosphere. They are rarely seen visually and are mostly observed with sensitive photographic equipment and, because of their weakness, only at night. Transient luminous events include Sprites, Jets and ELVES.