A small earthquake has struck the sprawling border city of Mexicali, Mexico. There are no immediate reports of injury or damages.

The U.S. Geological Survey reports that the magnitude-3.7 quake struck nine miles southwest of Mexicali shortly before 2 p.m. today.

The quake was felt across the border in Calexico, Calif., about 60 miles west of Yuma.

Firefighter Steve Mendibel says he felt the ground shake for what seemed like 15 seconds.