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

An earthquake with a preliminary magnitude of 3.1 struck in Colusa County on Wednesday, the U.S. Geological Survey said.

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

CWU Geological Sciences Professor Walter Szeliga received some well-deserved attention for his unique approach to detecting ...

Scientists are warning that a powerful earthquake in the Cascadia Subduction Zone could trigger a massive tsunami, ...

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

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.

The world’s most active volcano and earthquake zone is roaring to life, leading to potential of “the big one” – and a ...

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

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 ...