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This week, “frost quakes” were felt in Chicago. Here’s what scientists know and don’t know about the seismic phenomenon
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific developments and more. A cold weather phenomenon known as frost quakes, which make loud booming or popping sounds and cause small earthquake-like tremors, were felt around Chicago this week during the period of freezing temperatures. Illinois State Climatologist … Read more