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

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

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

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

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 ...

The recent earthquake is a reminder of the seismic volatility that characterizes the area near Eureka. The quake occurred in the vicinity of the Mendocino Triple Junction, a highly active seismic zone ...

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 magnitude 5.4 earthquake hit Humboldt County on New Year’s Day, rattling an area of Northern California that was still recovering from a deadly temblor just before Christmas. The epicenter of ...

The injury total from a deadly, magnitude 6.4 earthquake that rocked Northern California rose to 17 on Wednesday afternoon as recovery efforts continued in the area, local authorities said.