While they feature a loud popping noise, frost quakes are harmless. The below-zero temperatures, however, are dangerous.

SIOUX CITY (KTIV) - Residents of Palo Alto County reported loud booms to KTIV on Tuesday morning. The Arctic temperatures were likely the culprit, creating a phenomenon called a “frost quake” in ...

Rare frost quakes, also known as cryoseisms or ice quakes, were reported throughout the St. Louis region on Monday.

Loud booms in Saint Louis are likely caused by "frost quakes," a rare weather phenomenon due to a sudden temperature drop.

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Missourians noted hearing bangs and crashes the past couple of days, the result of frost quakes from freezing weather.