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See also "Table of Past Eruptions"
and visit each Northwest Volcano
Parks - Canada
Parks - USA
What is the Northwest?
& Time Zones
Provocative Description of the Pacific Northwest
|Ah yes, those gorgeous
Northwest skylines punctuated with soaring snow-capped peaks! Have you ever thought about why the region is blessed with such
beauty? Because underneath many of those beautiful, jagged, snowy mountains
If you are standing in the Pacific Northwest, you are standing on the results of the Juan
de Fuca oceanic plate grinding its way down under the North American continental plate.
Although the two plates meet 50-70 miles offshore, about 100 miles inland hot materials
rise from the Juan de Fuca "subducted" plate to the surface. There they
build (note the present tense!) the volcanoes of the Cascade Range, which march
north-south from Mount Garibaldi in British Columbia to Lassen Peak in California.
a nice visual summary showing how the northwest US states seem to have more than their
fair share of "volcanic hazards", have a look at this
map by the USGS. Note where the
Cascade Mountains and Yellowstone Park are in relation to the purple color theme. Montana is the only one of our Go Northwest!
states which is "volcano-free", although it is within range of the potential
effects of Cascade volcano eruptions.
Donald Leslie Mark offers factual information and personal experience of the various
Cascade mountains in an easy-to-read style. Includes original photos.
Home page for the USGS David A Johnston Cascades Volcano Observatory which is located in
Vancouver, Washington. This site has a wealth of information on the volcanoes.
(Click on a volcano name above for links to their pages on individual volcanoes).
Consists of links to earthquake-related sites for the Pacific Northwest.
Books from . . .
Guide to Washington's South Cascades' Volcanic Landscapes
by Marge Mueller, Ted Mueller (Contributor), Ira Spring (Photographer)
Books, October 1995 Paperback, 223 pages