Frigid temperatures in southern Wisconsin led to accounts of a rare “frost quake” late Tuesday, the Milwaukee Journal Sentinel reports.
“It would sound like someone drove into your house, but as far as we know it didn’t cause any damage,” meteorologist Justin Schultz told the newspaper.
Frost quakes involve the properties of water that cause it to expand when it freezes. When this happens underground, it can cause rock to crack. Here is a basic explanation of how it works:
No injuries were reported as a result of the frost quakes, scientifically known as a cryoseism.
The National Weather Service in Milwaukee tweeted that it had received accounts of frost quakes in the area. Bob Lesh, a meteorologist for Madison’s WISC-TV, also confirmed the weather phenomenon.
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