News

Many of us are used to seeing elongated “veins” in the rocks around us - streaks of minerals that precipitated over time to fill fractures in the...

A historic report on volcanoes in northern California by the volcanologist Howell Williams made a curious claim about Goosenest volcano. 

The USGS California Volcano Observatory is saddened to announce the death of Edward Wesley (Wes) Hildreth III, in a vehicle accident on June 19, 2025...

California's volcanoes may be relatively quiet nowadays, but they're still important places to study and monitor - especially ones that are close to...

Ever wonder what scientists are doing when you see them with strange equipment near hot springs and fumaroles? They're collecting some of nature's...

On January 7, 2025, the President announced the designation of the Sáttítla Highlands National Monument, a more than 200,000-acre area which...

This week, the California Volcano Observatory welcomes its newest Scientist-in-Charge, Phillip (Phil) Dawson!

Last week, a swarm of earthquakes happened below Long Valley's Mammoth Mountain, lasting a little over 12 hours. How do we decide whether or not it's...

We all know that volcanoes are figuratively cool, but sometimes it can be a challenge to convey the concept of just how hot they can get.

Volcanic hazards can be awe-inspiring displays of the Earth’s power, but each has the potential to threaten lives and infrastructure, as well as...