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Cascade Range Volcanoes
-- Graphic by: Lyn Topinka, 1996

[Map,20K,InlineGIF]
Major West Coast Volcanoes - Washington, Oregon, and California

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Potentially Active Volcanoes of the Western United States
-- Modified from: Brantley, 1994, Volcanoes of the United States: USGS General Interest Publication

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Cascades Eruptions During the Past 4000 Years

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Bend/Sisters/Santiam Pass/McKenzie Pass Area
-- Modified from: Taylor, Oregon State University, 1981, USGS Circular 838

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Central Oregon High Cascades
-- Modified from: Scott and Gardner, 1990

[Map,23K,InlineGIF]
Newberry Volcano and Vicinity
-- Modified from: Sherrod, et.al., 1997

[Map,39K,InlineGIF]
Quaternary-age Vents and Faults in the Three Sisters - Mount Bachelor Area
-- Modified from: Scott, 1987, GSA Special Paper 212

[Map,40K,InlineGIF]
University of Washington's Pacific Northwest Seismic Network
-- Modified from: University of Washington Geophysics Program, 1998, includes seismic station location map and link to PNSN

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Oregon and Southern Washington - University of Washington's Pacific Northwest Seismograph Network
-- Modified from: University of Washington Geophysics Program, 1999, includes seismic station location map and link to PNSN

[Graphic,18K,InlineGIF]
Eruptive History of Three Sisters region during past 15,000 years
-- Modified from: Scott, et.al., 2001, USGS Open-File Report 99-237

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InSAR Image, Three Sisters West Uplift
-- From: Wicks, May 2001

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Annotated NASA Image: Looking South at the Three Sisters, Mount Jefferson, and Mount Hood, Oregon, August 1985.
-- NASA Photo, courtesy NASA Earth From Space; Modified with text by USGS/CVO.

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Annotated NASA Image: Three Sisters, Broken Top, Mount Bachelor, and Diamond Peak, October 1994..
-- NASA Photo, courtesy NASA Earth From Space; Modified with text by USGS/CVO.

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