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

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?

The map is the first to include all 50 states in a single USGS assessment ... shows a range of earthquake probability across the U.S. Well known high-risk areas, such as California and Alaska ...

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

The U.S. Geological Survey reported two earthquakes with preliminary magnitudes of 3.5 and 3.0 ​hit near the San Bernardino ...

A magnitude 4.1 earthquake struck off the Northern California coast after midnight on Tuesday, the U.S. Geological Survey ...

The map is the first to include all 50 states in a single USGS assessment ... The color-coded map shows a range of earthquake probability across the U.S. Well known high-risk areas, such as California ...

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

According to the USGS report, the first earthquake occurred around 9:44 a.m. about three miles northeast of San Bernardino followed by another at 9:48 a.m. A USGS map showed shock waves reached ...