noun
transient luminous event
Technical term in atmospheric physics for brief optical phenomena in the mesosphere and lower ionosphere, such as sprites, blue jets, and elves.
中間圏発光現象は雷雲の上空で観測される。
Transient luminous events are observed above thunderclouds.
スプライトは中間圏発光現象の一種である。
Sprites are a type of transient luminous event.
Compound of 中間圏 (mesosphere) + 発光 (luminescence) + 現象 (phenomenon). A direct translation of the English term 'transient luminous event'.