.....If you hear a loud boom and feel the ground shake during an extreme cold event, it likely wasn’t an earthquake.
— AccuWeather (@accuweather) February 1, 2023
A cryoseism, also called an ice quake or a frost quake, occurs when water that trickled down into the ground during winter freezes and expands. #icestorm pic.twitter.com/FMbssLIWLD