Scientists link a magnitude 6.5 earthquake that shook Humboldt Bay, California, 71 years ago to the "locked" Cascadia ...

A series of moderate to minor earthquakes struck near the geologically active area in Northern California known as The ...

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

An earthquake swarm in Northern California early Thursday was another round of recurring temblors in a seismically active ...

What lies beneath Fickle Hill in northern California? Maybe the answer to an earthquake mystery that has puzzled ...

Two earthquakes struck different parts of Northern California early Thursday morning, according to the U.S. Geological Survey ...

More than 100 small earthquakes have been recorded near the Geysers geothermal field in Northern California since just after midnight Thursday, according to the U.S. Geological Survey.

A powerful earthquake with a preliminary magnitude of 7.0 struck off the coast of Northern California late Thursday morning local time, according to the US Geological Survey.

Two earthquakes struck different parts of Northern California early Thursday morning, according to the U.S. Geological Survey. The first, a 4.0-magnitude quake, hit at 5:48 a.m. about 5 miles ...

California is bisected by the San Andreas Fault, the boundary between the Pacific and North American tectonic plates, which is prone to earthquakes. The 750 mile fault's northern end terminates ...

The California coast has been rocked by six earthquakes in less than a day. The United States Geological Survey (USGS) has detected three new earthquakes Thursday afternoon near Hayward and ...