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

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

A magnitude-2.7 earthquake was reported Friday morning in the San Bernardino County community of Rialto. The quake was centered just north of Rialto and Fontana. Shaking was reported at about 9:30 a.m ...