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Data Series 789

Catalog of Earthquake Hypocenters at Alaskan Volcanoes: January 1 through December 31, 2012

By James P. Dixon, Scott D. Stihler, John A. Power, Matt Haney, Tom Parker, Cheryl Searcy, and Stephanie Prejean


Between January 1 and December 31, 2012, the Alaska Volcano Observatory located 4,787 earthquakes, of which 4,211 occurred within 20 kilometers of the 33 volcanoes monitored by a seismograph network. There was significant seismic activity at Iliamna, Kanaga, and Little Sitkin volcanoes in 2012. Instrumentation highlights for this year include the implementation of the Advanced National Seismic System Quake Monitoring System hardware and software in February 2012 and the continuation of the American Recovery and Reinvestment Act work in the summer of 2012. The operational highlight was the removal of Mount Wrangell from the list of monitored volcanoes. This catalog includes hypocenters, magnitudes, and statistics of the earthquakes located in 2012 with the station parameters, velocity models, and other files used to locate these earthquakes.

First posted August 15, 2013

  • Download the 2012 Alaska Volcano Observatory Seismic Catalog
    (ZIP, 1.4 MB)

For additional information contact:
Director, Alaska Volcano Observatory
U.S. Geological Survey
4210 University Dr.
Anchorage, Alaska 99508-4650

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Suggested citation:

Dixon, J.P., Stihler, S.D., Power, J.A., Haney, Matt, Parker, Tom, Searcy, C.K., and Prejean, Stephanie, 2013, Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2012: U.S. Geological Survey Data Series 789, 84 p.,





Data Acquisition and Processing

Seismic Velocity Models




References Cited

Appendix A. Maps of Monitored Volcanoes with Earthquake Hypocenters Calculated in 2012

Appendix B. Parameters for Alaska Volcano Observatory Seismograph Stations in 2012

Appendix C. Locations of the Alaska Volcano Observatory Seismograph Stations in 2012

Appendix D. Operational Status for Alaska Volcano Observatory Stations in 2012

Appendix E. Description of Earthquake List Parameters

Appendix F. Seismic Velocity Models Used in Locating the Earthquakes in 2012

Appendix G. Location of Volcanic Zones Modeled Using Multiple Cylinders

Appendix H. Previous Alaska Volcano Observatory Earthquake Catalogs

Appendix I. Selected Papers Published Using Alaska Volcano Observatory Data

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