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

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

Since Thursday, at least 131 earthquakes have been recorded — as small as magnitude 0.2 and as big as magnitude 4 — in the ...

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

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

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

More than 100 small earthquakes have been recorded near the Geysers geothermal field in Northern California since just after ...

Tsunami warning expires for Northern California after magnitude-7.0 offshore earthquake The quake struck at 10:44 a.m.Thursday.

OAKLAND, Calif. — A magnitude 4.2 earthquake rattled residents in Northern California on Wednesday, prompting a "ShakeAlert" across the region. The quake hit near the small community of Isleton ...

A 7.0 magnitude earthquake was reported off the coast of Northern California, according to the USGS. A tsunami warning that had been issued was canceled.

A magnitude 6.2 earthquake hit Northern California on Monday, bringing significant shaking but likely minimal damage to the sparsely populated area. The earthquake occurred just after noon and was ...