Environmental Geology

, Volume 5, Issue 2, pp 83–92 | Cite as

Glacier Peak, Washington: A potentially hazardous cascade volcano

  • J. E. Beget


Recent field studies of postglacial volcanic deposits at Glacier Peak indicate the volcano has erupted more often, more voluminously, and more recently than previously thought. These past eruptions produced pyroclastic flows, extensive lahars, and widely distributed tephra falls. Analysis of the magnitude of past eruptions and the distribution of volcanic sediments indicates that future eruptions at Glacier Peak as large as those of the last several thousand years would dramatically affect people and property downstream and downwind from the volcano. Pyroclastic flows and lateral blasts would primarily affect uninhabited valleys within a few tens of kilometers of the volcano. Lahars and floods constitute the major hazard to populated areas from future eruptions, and could affect areas at low elevation along valley floors and in the Puget lowland as far as 100 km downvalley west of the volcano. Air-fall tephra from future eruptions will probably be deposited primarily east of Glacier Peak because of prevailing westerly winds.


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Copyright information

© Springer-Verlag New York Inc. 1983

Authors and Affiliations

  • J. E. Beget
    • 1
  1. 1.Geothermal DepartmentChevron Resources Co.San Francisco

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