2018 Volcanic Activity in Alaska—Summary of Events and Response of the Alaska Volcano Observatory

Scientific Investigations Report 2023-5029
The Alaska Volcano Observatory is a consortium between the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys
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The Alaska Volcano Observatory responded to eruptions, considerable and minor volcanic unrest, and seismic events at 15 volcanic centers in Alaska during 2018. The most notable volcanic activity came from Mount Cleveland, which had continuing intermittent dome growth and ash eruptions, and Mount Veniaminof, Great Sitkin Volcano, and Semisopochnoi Island, the three of which had minor eruptions. This report also documents landslides at Iliamna Volcano; resuspended ash from the 1912 Novarupta-Katmai eruption; anomalous seismicity and heightened degassing at Pavlof Volcano; seismic unrest at Shishaldin Volcano; long-term inflation at Westdahl volcano, Akutan Volcano, and Mount Okmok; steam plumes, anomalous seismicity, and anomalous gas measurements at Makushin Volcano; elevated seismicity at Mount Gareloi; seismic signals possibly related to icequakes at Mount Spurr; and new mud flows at Shrub mud volcano.

Suggested Citation

Cameron, C.E., Orr, T.R., Dixon, J.P., Dietterich, H.R., Waythomas, C.F., Iezzi, A.M., Power, J.A., Searcy, C., Grapenthin, R., Tepp, G., Wallace, K.L., Lopez, T.M., DeGrandpre, K., and Perreault, J.M., 2023, 2018 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory: U.S. Geological Survey Scientific Investigations Report 2023–5029, 68 p., https://doi.org/10.3133/sir20235029.

ISSN: 2328-0328 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Volcanic Activity in Alaska, East to West Along the Aleutian Arc
  • References Cited
  • Glossary of Selected Terms and Acronyms
  • Appendix 1. Citations for Alaska Volcano Observatory Annual Summaries from 1992 to 2017
  • Appendix 2. Volcanoes Included in Previous Alaska Volcano Observatory Annual Summaries
  • Appendix 3. Aviation Color Codes and Volcano Alert Levels Used by United States Volcano Observatories
Publication type Report
Publication Subtype USGS Numbered Series
Title 2018 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory
Series title Scientific Investigations Report
Series number 2023-5029
DOI 10.3133/sir20235029
Year Published 2023
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Volcano Science Center
Description vii, 68 p.
Country United States
State Alaska
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details