California was rocked by a third earthquake in less than six hours, this one a moderately weak 2.7-magnitude seismic event. ...

A preliminary 2.7 magnitude earthquake struck Thursday morning near Hayward, according to the United States Geological Survey ...

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?

Authorities have declared a state of emergency on a second Greek island as a series of earthquakes continued to rattle the ...