A visible atmospheric phenomenon thought to be caused by an earthquake, typically similar in appearance to ball lightning or an aurora; usually in plural.
Origin
1970s; earliest use found in Post-Register (Idaho Falls, Idaho).
Definition of earthquake light in US English:
earthquake light
noun
A visible atmospheric phenomenon thought to be caused by an earthquake, typically similar in appearance to ball lightning or an aurora; usually in plural.
Origin
1970s; earliest use found in Post-Register (Idaho Falls, Idaho).