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Data Series 326

U.S. GEOLOGICAL SURVEY
Data Series 326

Catalog of Earthquake Hypocenters at Alaskan Volcanoes: January 1 through December 31, 2006

By James P. Dixon, U. S. Geological Survey, Scott D. Stihler, University of Alaska Fairbanks, John A. Power, U. S. Geological Survey, Cheryl Searcy, Science Applications International Corporation

Abstract

Between January 1 and December 31, 2006, AVO located 8,666 earthquakes of which 7,783 occurred on or near the 33 volcanoes monitored within Alaska. Monitoring highlights in 2006 include: an eruption of Augustine Volcano, a volcanic-tectonic earthquake swarm at Mount Martin, elevated seismicity and volcanic unrest at Fourpeaked Mountain, and elevated seismicity and low-level tremor at Mount Veniaminof and Korovin Volcano. A new seismic subnetwork was installed on Fourpeaked Mountain. This catalog includes: (1) descriptions and locations of seismic instrumentation deployed in the field during 2006, (2) a description of earthquake detection, recording, analysis, and data archival systems, (3) a description of seismic velocity models used for earthquake locations, (4) a summary of earthquakes located in 2006, and (5) an accompanying UNIX tar-file with a summary of earthquake origin times, hypocenters, magnitudes, phase arrival times, location quality statistics, daily station usage statistics, and all files used to determine the earthquake locations in 2006.

Contents

Abstract
Introduction
Instrumentation
Data Acquisition and Processing
Seismic Velocity Models
Seismicity
Seismicity Highlights
Summary
Acknowledgments
References Cited
Appendix A: Maps showing the locations (datum NAD27) of the earthquake hypocenters calculated for monitored volcanoes in 2006
Appendix B: Parameters for AVO seismograph stations (datum NAD27) in 2006
Appendix C: Figures showing the locations (datum NAD27) of the AVO seismograph stations in 2006
Appendix C: Figures showing the locations (datum NAD27) of the AVO seismograph stations in 2006
Appendix D: Operational status for AVO stations in 2006
Appendix E: Seismic velocity models used in locating the earthquakes described in this report
Appendix F: Maps showing the location of volcanic zones modeled using multiple cylinders
Appendix G: Previous AVO Earthquake Catalogs
Appendix H: Selected AVO papers published in 2006

This report is available online in Portable Document Format (PDF). If you do not have the Adobe Reader, it is available for free download from Adobe Systems Incorporated.

Download the report (PDF, 3 MB)

Download the 2006 Alaska Volcano Observatory Seismic Catalog (TAR/ZIP, 13.6 MB)

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Send questions or comments about this report to the author, J.P. Dixon, (907) 474-7099.

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