California is riddled with a number of fault lines that frequently cause earthquakes, including Arrowhead, Waterman Canyon, ...

A third earthquake struck California in less than six hours, this one rocking the city of Hayward near San Francisco and San ...

The strongest was a 3.4 magnitude quake that struck near San Bernardino, with more than 500 people feeling the quake.

The latest earthquake ... fault, which would measure magnitude 8 or higher. While no injuries or damage was reported, the seismic activity followed a deadly stretch of wildfires in Southern ...