What is "cryosismo", the unusual polar phenomenon that affects us?

These are frost-induced tremors, which occur when the water table freezes and expands, causing breakage of the earth and rocks.

At the heart of the polar cold wave that is affecting the central-eastern United States and that has caused the death of at least 10 people in recent hours, Chicago residents are experiencing a new phenomenon called "cryosism" .

Basically, "cryosisms" are frostquakes, which occur when groundwater freezes and expands, causing the earth and rocks to rupture.

"I thought I was crazy! I was up all night because I did not stop hearing it," Chastity told Clark Clark, a resident of the chain of local television.

"I was scared and I thought it was the oven, I kept walking in the house.Everyone was on the table in case we had to run," he said. he adds.

An estimated 224 million people have been affected by subzero temperatures. (Scope)