Frigid temperatures can cause frostbite, but they can also trigger little-known underground explosions called "frost quakes." These quakes are a rare weather phenomenon that has been reported with surprising frequency in the past week. Frost quakes, or cryoseisms, occur in the winter, when a warm spell allows rain or melting snow to seep into cracks and crannies in the ground. When a cold front suddenly...
Frigid Temperatures Trigger Rare Frost Quakes in U.S. and Canada
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