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California’s Restless Giant—the Long Valley Caldera

David P. Hill, Roy A. Bailey, James W. Hendley II, Peter H. Stauffer, and Mae Marcaida

7-14-17

Abstract

Scientists have monitored geologic unrest in the Long Valley, California, area since 1980. In that year, following a swarm of strong earthquakes, they discovered that the central part of the Long Valley Caldera had begun actively rising. Unrest in the area persists today. The U.S. Geological Survey (USGS) continues to provide the public and civil authorities with current information on the volcanic hazard at Long Valley and is prepared to give timely warnings of any impending eruption.

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https://pubs.usgs.gov/fs/2014/3056/

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