A Unified Catalog of Earthquake Hypocenters and Magnitudes at Volcanoes in Alaska—1989 to 2018

Scientific Investigations Report 2019-5037
By: , and 



The Alaska Volcano Observatory (AVO) has maintained an earthquake catalog since 1989 that now contains over 120,000 hypocenters and magnitudes that occurred near Alaskan volcanoes. Since 1989 the seismic instrumentation and data acquisition and processing techniques have undergone numerous changes as computer systems and seismic processing software have advanced and evolved. In this report we recalculate earthquake hypocenters and magnitudes in a consistent manner between October 1989 and January 2018. The new hypocenters and magnitudes are archived at the AVO within an AQMS database and in the compressed UNIX tar file that accompanies this publication.

Suggested Citation

Power, J.A., Friberg, P.A., Haney, M.M., Parker, T., Stihler, S.D., and Dixon, J.P., 2019, A unified catalog of earthquake hypocenters and magnitudes at volcanoes in Alaska—1989 to 2018: U.S. Geological Survey Scientific Investigations Report 2019–5037, 17 p., https://doi.org/10.3133/sir20195037.

ISSN: 2328-0328 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Earthquake Catalog—Instrumentation, Data Acquisition, and Processing
  • Hypoinverse Configuration
  • Relocation of Hypocenters—1989–2012
  • Recalculation of Magnitudes
  • Structure of the Accompanying Data File
  • Summary and Conclusions
  • References Cited
  • Appendix
Publication type Report
Publication Subtype USGS Numbered Series
Title A unified catalog of earthquake hypocenters and magnitudes at volcanoes in Alaska—1989 to 2018
Series title Scientific Investigations Report
Series number 2019-5037
DOI 10.3133/sir20195037
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Volcano Science Center
Description Report: v, 17 p.; Metadata; Read Me; Database
Country United States
State Alaska
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details