What's a frost quake? - Popular Science

More than 200 years ago, in 1819, American geologist Edward Hitchcock purportedly made the first North American report of a frost quake. In a letter to the American Journal of Science, Hitchcock reported a large surface crack on the ground in Deerfield, Massachusetts. He wrote that “about one o’clock in the morning of March 4th, Mr. Seth Sheldon and family, living one mile south of this spot, and being awake, were alarmed by a loud report from the north, by which their house and furniture were much shaken.” Others living near the spot, Hitchcock said, were also awakened by the clamor, which he suspected was related to a nearby river flooding followed by a cold air front.

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