California Volcano Observatory

News

Filter Total Items: 84
Date published: January 1, 2016

CalVO Fact Sheet Published En Español

We are pleased to announce the Spanish translation of our recently published CalVO Fact Sheet The California Volcano Observatory – Monitoring the State's Restless Volcanoes.

Date published: December 22, 2015

New insight into faults in the Long Valley Caldera reduces the predicted earthquake shaking intensity

The shaking hazard posed by earthquakes on range-front faults near the town of Mammoth Lakes, CA is lower than previously estimated.

Date published: November 16, 2015

Field-trip guide for Lassen Volcanic Center published

USGS geologists Patrick Muffler and Michael Clynne published a new geologic field-trip guide for areas in and around Lassen Volcanic National Park in northern California.

Date published: November 4, 2015

3D Images of Magma Below Mono Craters Area

USGS CalVO scientists have developed a new 3D conceptual model of the magma system below Mono Lake and Mono Craters in eastern California to give scientists a more detailed understanding of volcanic processes at depth.

Date published: October 29, 2015

3D Images of Magma Below Mono Craters Area

A new conceptual model of the magma system below Mono Lake and Mono Craters in eastern California gives scientists a more detailed understanding of volcanic processes at depth, and a better model for forecasting volcanic unrest.

Date published: September 8, 2015

Binational Exchange provides opportunity for Chile and US officials to work together on volcano hazard risk reduction.

Scientists, civil authorities, and emergency managers from Chile and the U.S. met in California to discuss the challenges of effective volcanic hazard education, response planning, hazard mitigation, and risk reduction, as part of the second Binational Exchange program for Volcanic Risk Reduction in the Americas.

Date published: September 3, 2015

Bi-national Exchange provides opportunity for Chile and US officials to work together on volcano hazard risk reduction

Scientists, civil authorities, and emergency managers from Chile and the U.S. met in California to discuss the challenges of effective volcanic hazard education, response planning, hazard mitigation, and risk reduction, as part of the second Bi-national Exchange program for Volcanic Risk Reduction in the Americas.

Date published: May 19, 2015

Lassen Peak Eruption 100th Anniversary - May, 2015

2015 marks the centennial of the May 22, 1915 explosive eruption of Lassen Peak.

Date published: April 3, 2015

Mount Shasta earthquake series poses no immediate hazard

Since February 19, 2015 an ongoing series of small earthquakes has been occurring approximately 5 miles southeast of the summit of Mount Shasta, near the Clear Creek Trailhead on a regional, unnamed fault at about 3-5 miles depth.

Date published: November 12, 2014

Earthquake Swarm near Lassen Volcanic Center

CalVO is tracking an earthquake swarm that began on November 9 located at the Tehama County-Plumas County border within Lassen National Forest.

Date published: October 31, 2014

Published overview of low-level unrest in the Long Valley Caldera, eastern California

A cataclysmic eruption of 600 km3 of rhyolite magma (Bishop Tuff) about 760,000 years ago resulted in the collapse of the partially evacuated magma chamber to form the present 17 by 32 km (10 by 20 mi) Long Valley Caldera.

Date published: October 13, 2014

Sierra Nevada Earthquake Swarm

The USGS California Volcano Observatory (CalVO) is tracking an earthquake swarm in the Sierra Nevada range south of Long Valley Caldera, about 8 miles SW of Toms Place and 15 miles SE of the town of Mammoth Lakes.