California Volcano Observatory

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As a part of the U.S. Geological Survey's Volcano Hazards Program, the California Volcano Observatory aims to advance scientific understanding of volcanic processes and lessen the harmful impacts of volcanic activity in the volcanically active areas of California and Nevada. 


News

Date published: August 27, 2019

New names at Newberry drawn from CalVO geologist's mapping

In June 2019, the U.S. Board on Geographic Names approved twenty-five new formal geographic names at Newberry Volcano in central Oregon. The names were proposed by Julie Donnelly-Nolan, a Research Geologist with the Volcano Science Center of the USGS in Menlo Park, CA.

Date published: July 10, 2019

Earthquake swarm south of Coso Volcanic Field continues with declining intensity. We continue to monitor

The seismic activity that started on the evening of July 5 at the southern margin of Coso Volcanic Field in Inyo County, California continues at a rate of about 600 M1.0 or greater earthquakes per day.

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