USGS/Cascades Volcano Observatory, Vancouver, Washington
REPORT:
Volcano Hazards in the Mount Hood Region, Oregon
--
W.E. Scott,
T.C. Pierson,
S.P. Schilling,
J.E. Costa,
C.A. Gardner,
J.W. Vallance, and
J.J. Major, 1997,
Volcano Hazards in the Mount Hood Region, Oregon:
U.S. Geological Survey Open-File Report 97-89, 14p.
Introduction
Snow-clad Mount Hood dominates the Cascade
skyline from the Portland metropolitan area to the
wheat fields of Wasco and Sherman Counties. The
mountain contributes valuable water, scenic, and
recreational resources that help sustain the
agricultural and tourist segments of the economies of
surrounding cities and counties. Mount Hood is also
one of the major volcanoes of the Cascade Range,
having erupted repeatedly for hundreds of thousands of
years, most recently during two episodes in the past
1,500 yr. The last episode ended shortly before the
arrival of Lewis and Clark in 1805. When Mount Hood
erupts again, it will severely affect areas on its
flanks and far downstream in the major river valleys
that head on the volcano. Volcanic ash may fall on
areas up to several hundred kilometers downwind.
The purpose of this report is to describe the
kinds of hazardous geologic events that have happened
at Mount Hood in the past and to show, in the
accompanying volcano-hazard-zonation maps, which areas
will be at risk when such events occur in the future.
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05/22/00, Lyn Topinka