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 ...

A series of more than 100 earthquakes has hit Northern California, shaking up the Geysers geothermal steam field in Sonoma ...

A preliminary magnitude 3.6 earthquake was recorded about six miles southwest of Idyllwild, according to USGS.

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

Some earthquakes are followed by a larger earthquake, in which case the first quake would then be called a foreshock. For example, the magnitude-9.1 Japan earthquake and tsunami in 2011 was preceded ...