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You might envision a stratovolcano as one massive cone with a single summit crater. But in reality, volcanoes are complex constructions that may have...

Volcanoes in California (and everywhere!) are often covered with vegetation, including thick forests. Fortunately, the USGS can use laser technology...

Did you know that Long Valley is not the only caldera in California? In fact, there are at least 5.

Today we're highlighting an unusual type of California volcano: Seamounts!

How does hot water bring down volcanic slopes?

The U.S. Geological Survey recently released a new Volcano Hazards Program Strategic Science Plan for 2022-2026.

Volcanoes are an incredible feature of Earth’s geologic environment – at once awe-inspiring and terrifying. They remind us that the planet we call...

Before the current network of USGS volcano observatories existed, the USGS Volcano Hazards Program grew primarily out of two existing entities:  the...

During March 24 to April 3, 2022, seismologists observed a slight uptick in seismic activity at Newberry Volcano. The earthquakes occurred in an area...

Nearly all of California’s geothermal electric power generation comes from areas where eruptions occurred in the past tens of thousands of years