California Volcano Observatory


Filter Total Items: 84
Date published: November 30, 2018

USGS publishes strategic plan for examining risk from natural hazards

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 research and applications.

Date published: October 29, 2018

Development of a field-portable helium isotope detector for continuous, real-time monitoring of active volcanoes

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

Date published: October 24, 2018

Volcanic Threat Assessment help prioritize risk reduction efforts at 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 infrastructure to harm during the next eruption.

Date published: August 15, 2018

Probing the Depths of Long Valley Caldera

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

Date published: April 18, 2018

Pleistocene volcanism and shifting shorelines at Lake Tahoe, California

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

Date published: December 18, 2017

USGS volcanologists conduct volcanic crisis training in Chester, CA

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 FEMA training course allows them to do just that.

Date published: July 31, 2017

Subsurface Magma Triggers Earth’s Most Severe Extinction

Subsurface magma intrusions (sills), rather than surface lava flows, may have triggered the Earth’s most catastrophic extinction event approximately 252 million years ago.

Date published: April 5, 2017

Explore California's volcanic legacy and future with new field trip guides

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 state occurred just 100 years ago.

Date published: April 3, 2017

New ages confirm that the youngest Eagle Lake volcanic rocks erupted 130-125 thousand years ago

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, minimizing the possibility of future eruption.

Date published: March 15, 2017

New scientific publications about our California Volcanoes by USGS authors

Two new journal articles about California Volcanoes in the eastern part of the state, the Long Valley Caldera and Ubehebe Craters, are headed to press.