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 Subduction Zone.

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 midnight Thursday, according to the U.S. Geological Survey.

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 ...

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 ...

The risk of a devastating mega-tsunami from the Cascadia Subduction Zone highlights the need for improved evacuation plans.

Southern Washington, northern Oregon, and northern California are the regions which are most vulnerable to flooding from a ...

Scientists are warning of a potentially catastrophic mega-tsunami that could strike parts of the US Pacific Coast, triggered ...

Experts have issued an urgent warning regarding a supposed upcoming earthquake known as 'The Big One'. Scientists explained that the earthquake could have a magnitude of around 7.7 on the Richter ...