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

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

A 4.5 magnitude earthquake and other smaller quakes rocked the Humboldt County coastline in Northern California on Feb. 11 and 12. What's happening?

Two minor earthquakes struck the San Bernardino area on Monday, Feb. 10, the U.S. Geological Survey said. At 9:44 a.m., a ...