News

A new USGS report, Science for a Risky World: A USGS Plan for Risk Research and Applications, defines for the first time the role of USGS in risk...

Scientists from the USGS Volcano Hazards Program have been developing various technologies that allow for real-time and continuous measurements of gas...

Since 1980, there have been 120 eruptions and 52 episodes of notable volcanic unrest at 44 U.S. volcanoes.

The USGS assesses active and potentially active volcanoes in the U.S., focusing on history, hazards and the exposure of people, property and...

A new study by CalVO seismologists used a novel geophysical technique called "full waveform seismic tomography" to image the roots of Long Valley...

A recently-published study co-authored by two CalVO scientists brings attention to the role that lava dams played in shaping Lake Tahoe.

It isn't often that scientists and land managers spend two entire days together talking about volcanoes outside of an eruptive crisis, but a special...

Subsurface magma intrusions (sills), rather than surface lava flows, may have triggered the Earth’s most catastrophic extinction event approximately...

California is well-known for its frequent earthquakes, but less so for its volcanic history – despite the fact that the most recent eruption in the...

New research on the ages of the most recent lava flows at Eagle Lake Volcanic Field, California suggest they are much older than once thought...