Frost quakes reported across Middle TN

NASHVILLE, Tenn. (WKRN) — Many across Middle Tennessee reported hearing and feeling frost quakes Monday night.

Some have thought these “booms” were transformers blowing, but there’s a more scientific explanation behind it.

A “frost quake,” also known as an “ice quake” or cryoseism, occurs when the ground is saturated with water or ice. according to the National Weather Service.

A rapid drop in temperature causes the saturated ground to quickly freeze. When the water underground suddenly freezes into ice, it then expands, causing the surrounding soil and rock to crack, producing a loud noise, known as a “frost quake.”

The “explosion” is the result of the pressure being released with a booming sound and slight tremor.The National Weather Service reports the activity is completely harmless.Frost quakes typically occurs in the Northeastern United States and Canada so this activity in Middle Tennessee is extremely rare.