California Volcano Observatory


Filter Total Items: 84
Date published: March 12, 2013

CalVO's Successful First Year of Operation

February 2013 marked the first year of successful volcano monitoring and preparing for possible volcanic eruption for the California Volcano Observatory (CalVO).

Date published: February 21, 2013

Volcano Hazards Discussed at Joint State and Federal Meeting

Many of California's young volcanoes pose a threat to people and property.

Date published: October 12, 2012

Lassen Hazards Assessment Published

A hazards assessment for Lassen Volcanic Center, California, is now available for download from the USGS Publications Warehouse.

Date published: October 12, 2012

Aeromagnetic Survey of Long Valley and Mono Basin Volcanic Areas

In mid-October, U.S. Geological Survey volcanologists and geophysicists plan to conduct the first comprehensive, high-resolution airborne magnetic survey of the rock layers under Mono Basin and Long Valley, on the east side of the California Sierra Nevada mountains.

Date published: August 27, 2012

Earthquake Swarm in the Brawley Seismic Zone

An energetic earthquake swarm (largest event magnitude 5.5) is ongoing in the Brawley Seismic Zone south of the Salton Sea in Southern California.

Date published: July 24, 2012

Summer Field Work Underway

Summer is the time when most CalVO scientists get out into the field to conduct geologic and ground-based monitoring investigations of our regional volcanoes.

Date published: May 22, 2012

May 22 marks Lassen Peak's 97th eruption anniversary

On May 22, 1915 an explosive volcanic eruption occurred at Lassen Peak, California.

Date published: January 10, 2012

Hello CalVO

Welcome to the new USGS California Volcano Observatory website! The USGS Volcano Science Center recently restructured observatory operations to optimize volcano monitoring, eruption forecasting, and hazard mitigation efforts throughout California.

Date published: November 30, 2011

California Volcano Observatory website released at AGU

During FY11, Long Valley Observatory's jurisdiction was expanded to encompass all California volcanoes and one volcanic center in Nevada. The Observatory's name will change to California Volcano Observatory (CalVO), which will correspond to a new website launch in early 2012.

Date published: August 16, 2011

California volcanoes web pages soft, internal launch

A new design for the USGS Volcano Science Center (VSC) web pages is now open for internal viewing. This site has not been fully developed yet, and there are still many holes to fill. The launch is meant to give VSC staff a preview into the new database-driven website design.

Date published: August 12, 2011

A Geologic 'Event' at Lassen Volcanic National Park

The U.S. Geological Survey and Lassen Volcanic National Park are pleased to announce a special public presentation by USGS scientists to unveil, the "Geologic Map of Lassen Volcanic National Park and Vicinity," a map and booklet that interprets the detailed geology of the park.

Date published: August 1, 2011

USGS rules out volcanic origin of plume-like feature seen in NEXRAD in Mojave Desert (California)

Inquiries have come to the USGS regarding a potential eruption in the vicinity of Lavic Lake Volcanic Field (LLVF) in Southern California.