3.1 magnitude earthquake strikes near Ontario, California, part of increased seismic activity.

A magnitude 3.1 earthquake struck near Ontario, California, on Tuesday at 12:56 p.m., with a depth of 3.5 miles. It caused light shaking in surrounding areas, including Rancho Cucamonga and Fontana. This quake is part of a recent trend of increased seismic activity in Southern California, with several earthquakes of magnitude 3.0 or higher occurring in the past week. Residents are encouraged to prepare for future quakes with essential emergency kits.