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1989-90 Eruption of Redoubt Volcano, Alaska, and the First Test Case of a USGS Lahar-Detection System
This web page describes the lahars that swept down the Drift River Valley during the 1989-90 eruption of Redoubt Volcano, Alaska, and the testing of a new experimental detection and warning system designed to track lahars and debris flows and to give warning to people downstream. In this case, an oil-storage facility in the Cook Inlet area was at risk. The seismometers used (acoustic-flow monitors) were sensitive to ground vibration at relatively high frequencies. On April 6, 1990 the system did detect and track lahars moving down a valley in real time. The amplitude and ground velocity data are diagrammed.
Intended for grade levels:
  • General public
Type of resource:
  • Text:
    • Report
  • Geological Sciences:
    • Geophysics
  • Natural hazards
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested.
DLESE Catalog ID: DLESE-000-000-000-425
Resource contact / Creator / Publisher:
Publisher: United States Geological Survey, Volcano Hazards Program

Contact: United States Geological Survey

Author: R. J. Clucas
United States Geological Society (USGS)

Author: S. R. Brantley
United States Geological Society (USGS)

Author: J. Major
United States Geological Society (USGS)