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

INYO COUNTY, CA - A preliminary 2.5 magnitude quake was detected near Dixon Lane-Meadow Creek Wednesday morning, according to ...

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.

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.

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

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 ...

A stretch of unusually hot weather combined with exceptionally dry vegetation will elevate the risk of wildfire.

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