noun
upper-atmospheric lightning; upper-atmospheric discharge
Scientific term for transient luminous events above thunderstorms, such as sprites, elves, and blue jets.
超高層雷放電は、雷雲の上空で起こる発光現象の総称です。
Upper-atmospheric lightning is a general term for luminous phenomena that occur above thunderclouds.
Compound of 超高層 (extreme high altitude) + 雷 (lightning) + 放電 (discharge). A modern scientific term.