The California Volcano Observatory: Monitoring the State's Restless Volcanoes

Fact Sheet 2014-3120
By: , and 



Volcanic eruptions happen in the State of California about as frequently as the largest earthquakes on the San Andreas Fault Zone. At least 10 eruptions have taken place in California in the past 1,000 years—most recently at Lassen Peak in Lassen Volcanic National Park (1914 to 1917) in the northern part of the State—and future volcanic eruptions are inevitable. The U.S. Geological Survey California Volcano Observatory monitors the State's potentially hazardous volcanoes.

Suggested Citation

Stovall, W.K., Marcaida, Mae, and Mangan, M.T., 2014, The California Volcano Observatory—Monitoring the State’s Restless Volcanoes (ver. 1.1, June 2019): U.S. Geological Survey Fact Sheet 2014–3120, 4 p.,

ISSN: 2327-6932 (online)

ISSN: 2327-6916 (print)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title The California Volcano Observatory: Monitoring the state's restless volcanoes
Series title Fact Sheet
Series number 2014-3120
DOI 10.3133/fs20143120
Edition Ver. 1: December 2014; Ver. 1.1: June 2019
Year Published 2014
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Volcano Science Center
Description 4 p.
Country United States
State California
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details