Skip Links

USGS - science for a changing world

Open-File Report 2014–1222

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

Thumbnail of and link to report PDF (73.7 MB)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

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

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge.

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,

ISSN 2331-1258 (online)


Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Wednesday, 07-Dec-2016 19:39:26 EST