Southern California was rocked by a trio of earthquakes in just hours. Two of the quakes struck in 10 minutes, with tremors rattling nerves across Los Angeles.

Some earthquakes are followed by a larger earthquake, in which case the first quake would then be called a foreshock. For ...

A 3.6-magnitude earthquake shook parts of Southern California, the U.S. Geological Survey reported. The about 10-mile deep quake hit about 6 miles southwest from Idyllwild in Riverside County shortly ...