‘Frost quakes’ were felt around Chicago this week. Here’s what scientists do and don’t know about the seismic phenomenon
By Katie Hunt, CNN (CNN) — A cold weather phenomenon known as frost quakes, which make loud booming or popping sounds and unleash small earthquake-like tremors, was felt around Chicago during this week’s bout of below-zero temperatures. Illinois state climatologist Trent Ford said there was no formal reporting system for frost quakes, which occur after
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