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

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

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

Seismic retrofit program offers up to $3,000 for older homes in over 1,100 ZIP Codes, now expanding to include rentals and other non-owner-occupied residential properties ...

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 signs indicated an eruption was likely, though not certa ...