In March, the observatory said it had measured “significantly elevated volcanic gas emissions" from Mount Spurr and said ...

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

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

Earthquakes can wreak havoc on day-to-day life if you're on the ground, but is there any threat to those who are in an ...

Californians can now apply to the California Earthquake Authority's Brace + Bolt grant program, which gives money to homeowners, and now landlords, to strengthen homes against earthquake damage.

According to the U.S. Geological Survey, a preliminary 2.4 magnitude quake struck near Petrolia Wednesday morning.

A 5.7-magnitude earthquake struck the Drake Sea near Puerto Williams, Chile, in the early hours of Tuesday. Alarms were ...

The Diablo Canyon nuclear plant is in the midst of a relicensing process that, if successful, will keep it running for ...

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

A dangerous heat wave is about to take hold across the southwest. We're tracking the dramatic rise in temperatures from Arizona to Southern California. We'll show you how local officials are preparing ...