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Data Series 467

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Catalog of Earthquake Hypocenters at Alaskan Volcanoes: January 1 through December 31, 2008

By James P. Dixon, U.S. Geological Survey, and Scott D. Stihler, University of Alaska Fairbanks

ABSTRACT

Between January 1 and December 31, 2008, the Alaska Volcano Observatory (AVO) located 7,097 earthquakes of which 5,318 occurred within 20 kilometers of the 33 volcanoes monitored by the AVO. Monitoring highlights in 2008 include the eruptions of Okmok Caldera, and Kasatochi Volcano, as well as increased unrest at Mount Veniaminof and Redoubt Volcano. This catalog includes descriptions of: (1) locations of seismic instrumentation deployed during 2008; (2) earthquake detection, recording, analysis, and data archival systems; (3) seismic velocity models used for earthquake locations; (4) a summary of earthquakes located in 2008; 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 2008.

For additional information contact:
Director, Alaska Science Center
U.S. Geological Survey
4210 University Dr.
Anchorage, Alaska 99508-4650
http://alaska.usgs.gov

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Suggested citation:

Dixon, J.P., and Stihler, S.D., 2009, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2008: U.S. Geological Survey Data Series 467, 88 p.


Contents

Abstract

Introduction

Instrumentation

Data Acquisition and Processing

Seismic Velocity Models

Seismicity

Summary

Acknowledgments

References Cited

Appendix A. Maps of Monitored Volcanoes with Earthquake Hypocenters Calculated in 2008

Appendix B. Parameters for Alaska Volcano Observatory Seismograph Stations in 2008

Appendix C. Locations of the Alaska Volcano Observatory Seismograph Stations in 2008

Appendix D. Operational Status for Alaska Volcano Observatory Stations in 2008

Appendix E. Seismic Velocity Models Used in Locating the Earthquakes in 2008

Appendix F. Location of Volcanic Zones Modeled Using Multiple Cylinders

Appendix G. Previous Alaska Volcano Observatory Earthquake Catalogs

Appendix H. Selected Papers Published in 2008 Using Alaska Volcano Observatory Data