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A TOMOGRAPHIC STUDY OF THE LONG VALLEY CALDERA,
CALIFORNIA, USING IMPROVED HYPOCENTER LOCATIONS AND
DOUBLE DIFFERENCE TOMOGRAPHY
by
Ilene Ellen Cooper
A Thesis Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(EARTH SCIENCES)
August 2007
Copyright 2007 Ilene Ellen Cooper
Object Description
| Title | A tomographic study of the Long Valley caldera, California, using improved hypocenter locations and double difference tomography |
| Author | Cooper, Ilene Ellen |
| Author email | ilenecooper@yahoo.com |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Geological Sciences |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2007-07-02 |
| Date submitted | 2007 |
| Restricted until | Unrestricted |
| Date published | 2007-08-01 |
| Advisor (committee chair) | Jordan, Thomas H. |
| Advisor (committee member) |
Lund, Steven P. Becker, Thorsten W. |
| Abstract | Long Valley has been one of the most seismically active regions in California for the last 25 years. In addition to this seismicity, Long Valley is an active volcanic region. Ash from previous eruptions has fallen over an area including twelve states, extending as far east as Kansas. This seismic and volcanic activity has resulted in the region being densely populated with scientific instruments. These features make Long Valley an ideal location for a tomographic study. This study focuses on magma chamber location beneath the Long Valley Caldera. Using precisely relocated earthquake hypocenters from hypoDD (Waldhauser, 2001) I used a double-difference tomography program tomoDD (Zhang and Thurber, Aug. 2003) to determine the velocity structure beneath Long Valley Caldera. I then used the velocity data to determine the locations of the magma chamber and CO2 reservoir beneath the caldera from 1980 to mid-1997, 1997 to 1998, and 1999 to 2006. |
| Keyword | Long Valley; tomography |
| Geographic subject | valleys: Long Valley |
| Geographic subject (state) | California |
| Geographic subject (country) | USA |
| Coverage date | 1980/2006 |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m734 |
| Rights | Cooper, Ilene Ellen |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Cooper-20070801 |
| Archival file | uscthesesreloadpub_Volume40/etd-Cooper-20070801.pdf |
Description
| Title | Page 1 |
| Full text | A TOMOGRAPHIC STUDY OF THE LONG VALLEY CALDERA, CALIFORNIA, USING IMPROVED HYPOCENTER LOCATIONS AND DOUBLE DIFFERENCE TOMOGRAPHY by Ilene Ellen Cooper A Thesis Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE (EARTH SCIENCES) August 2007 Copyright 2007 Ilene Ellen Cooper |
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