A magnitude 3.1 earthquake was detected near the capital ... approximately 120 kilometers (75 miles) east of Columbus. The region sits atop an ancient fault line—a structural weakness in the Earth’s ...

Fault zones are often wide, branching networks rather than narrow lines, requiring a shift to 3D models for better earthquake ...

An earthquake struck Julian Monday morning and was felt across San Diego County, including parts of Los Angeles and Tijuana.