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

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

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

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

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

A 7.0 magnitude earthquake shook a large area of Northern California on Thursday, knocking items off grocery store shelves, sending children scrambling under desks and prompting a brief tsunami ...

A small earthquake rattled the Sacramento-San Joaquin River Delta region of Northern California on Wednesday morning, prompting a widespread early warning and shaking residents near Isleton but ...

A 7.0 magnitude earthquake shook a large area of Northern California on Thursday, knocking items off grocery store shelves, sending children scrambling under desks and prompting a brief tsunami ...

A 7.0-magnitude earthquake struck off the coast of northern California Thursday morning, about 40 miles west of the community of Petrolia, the US Geological Survey said.

A strong earthquake shook a rural stretch of Northern California early Tuesday, jolting residents awake, cutting off power to 70,000 people, and damaging some buildings and a roadway, officials said.

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.