 Catastrophic damage is predicted in the event of an earthquake with major damage resulting from the liquefaction of the clay- and sand-based soil.The largest earthquake that has occurred near Clearfield City in the recorded past occurred on 12/7/1967, and was away in Park City, Utah and registered at magnitude of 4.3.The Wasatch Front valley floor is the ancient lakebed of Lake Bonneville which existed at the end of the last Ice Age.