USGS Open-File Report 2014–1222: Long Valley Caldera 2003 through 2014: Overview of Low Level Unrest in the Past Decade

Long Valley Caldera 2003 through 2014: Overview of Low Level Unrest in the Past Decade

By Stuart Wilkinson, David P. Hill, John O. Langbein, Mike Lisowski, and Margaret Mangan

Abstract

Long Valley Caldera is located in California along the eastern escarpment of the Sierra Nevada Range. The caldera formed about 760,000 years ago as the eruption of 600 km³of rhyolite magma (Bishop Tuff) resulted in collapse of the partially evacuated magma chamber. Resurgent doming in the central part of the caldera occurred shortly afterwards, and the most recent eruptions inside the caldera occurred about 50,000 years ago. The caldera remains thermally active, with many hot springs and fumaroles, and has had significant deformation and seismicity since at least 1978. In this poster, we extend the timeline forward, documenting seismicity and deformation over the past decade.

First posted October 21, 2014

Report PDF (11.1 MB)

This report is only available on-line

For additional information, contact:
Contact CalVO
Volcano Science Center, California Volcano Observatory
U.S. Geological Survey
345 Middlefield Road, MS 910
Menlo Park, CA 94025
http://volcanoes.usgs.gov/observatories/calvo/

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Suggested citation:

Wilkinson, S., Hill, D.P., Langbein, J.O., Lisowski, M., and Mangan, M., 2014, Long Valley Caldera 2003 through 2014—Overview of low level unrest in the past decade: U.S. Geological Survey Open-File Report 2014–1222, 1 sheet, https://dx.doi.org/10.3133/ofr20141222.

ISSN 2331-1258 (online)