Skip to main content
U.S. flag

An official website of the United States government

News

Filter Total Items: 85
link

We continue to monitor and report on volcanic activity during any lapse in appropriations

During the current federal government shutdown, the Volcano Hazard Program and all five U.S. Volcano Observatories will continue to issue updates...

Read Article
link

Which U.S. volcanoes pose a threat?

USGS Volcanic Threat Assessment updates the 2005 rankings.

Read Article
link

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...

Read Article
link

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...

Read Article
link

Volcanic Threat Assessment help prioritize risk reduction efforts at U.S. volcanoes

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

Read Article
link

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...

Read Article
link

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...

Read Article
link

Pleistocene volcanism and shifting shorelines at Lake Tahoe, California

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

Read Article
link

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...

Read Article
link

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...

Read Article
link

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...

Read Article
link

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...

Read Article