![[Link to USGS home page]](volcban2.gif)
U.S. Geological Survey Open-File Report 97-89
|
|
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 the volcano hazard report
is to describe the kinds of hazardous geologic events that have happened at
Mount Hood in the past and to show which areas will be at risk when such
events occur in the future. This data release contains geographic information system (GIS) data layers used to produce the Mount Hood volcano hazard map in OFR 97-89 (Scott and others, 1997) is included in this data set. Both proximal and distal hazard zones were delineated by scientists at the Cascade Volcano Observatory and depict various volcano hazard areas around the mountain. A second data layer contains points that indicate estimated travel times of lahars. |
|
|
|
|
|
|
|
|
|
|
|
2007
U.S. Department of the Interior
U.S. Geological Survey
intro.html
March, 2007