Did you hear a loud boom outside Tuesday night? It might have been a "frostquake," according to the National Weather Service's Milwaukee/Sullivan office.
The NWS explained the phenomenon in a Facebook post:
We have received reports of a loud boom and even some rumbling near the Columbus/Fox Lake area, down to the Johnson...
Dozens of people confirmed the frostquake in the comments, including one man who described it as "like a steam roller vibrating on fresh asphalt."
Cryoseisms, as they're officially known, happen largely in the Midwestern, Northern, and Northeastern United States, but also in Canada.
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