‘Frost earthquakes’ were felt in Chicago this week. Here’s what scientists do and don’t know about the seismic event
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific advancements and more. A cold weather phenomenon known as freeze earthquakes, which produce loud popping or popping sounds and small earthquake-like tremors, was felt around Chicago during this week’s subzero temperatures. Illinois state climatologist Trent Ford said there… Read More »