USGS/Cascades Volcano Observatory, Vancouver, Washington
Three Sisters, Oregon
Earthquakes and Seismicity
- Current Activity
- Pacific Northwest Seismograph Network
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Pacific Northwest Seismograph Network
-- Information, Maps, includes link to the University of Washington PNSN Website
Earthquakes commonly provide the earliest warning of volcanic unrest, and earthquake swarms immediately precede most volcanic eruptions. Information on Pacific Northwest earthquake activity and hazards is provided by the Pacific Northwest Seismograph Network (PNSN) which operates seismograph stations and locates earthquakes in Washington and Oregon. The PNSN is operated jointly by the University of Washington, the University of Oregon, and Oregon State University, and is funded by the U.S. Geological Survey, the Department of Energy, and the State of Washington. The PNSN is based at the Geophysics Program of the University of Washington in Seattle, and is a member of the Council of the National Seismic Systems (CNSS), a group of regional network operators who cooperate to locate and catalog earthquakes throughout the United States. -- Wright and Pierson, 1992; and the University of Washington's Geophysics Program
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2003, Seismic Monitoring at Cascade Volcanic Centers - The Big Picture
Informational text and shaded relief map
showing locations of all PNSN/NCSN seismic stations operating in the Pacific Northwest as of November, 2003. Map includes the 13 major Cascade volcanic centers.
-- Excerpt from: Moran, 2005, USGS Scientific Investigations Report 2004-5211
- Terminology
- Maps and Graphics
- Useful Links
- Items of Interest
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Cascade Range Current Activity Updates
-- includes Three Sisters
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Cascade Range Earthquakes and Seismicity - Description
-- general information about Cascade Range Earthquakes and Seismicity
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Cascade Range Earthquakes and Seismicity - Menu
-- general information about Cascade Range Earthquakes and Seismicity
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Current Seismicity - Link
-- Link courtesy
University of Washington Pacific Northwest Seismic Network
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Earthquake Terminology
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Earthquakes and Seismicity - Menu
-- general information about Earthquakes and Seismicity
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Maps and Graphics - Earthquakes and Seismicity
-- includes Oregon and the Three Sisters
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Monitoring - Three Sisters Monitoring - Menu
-- includes earthquake monitoring
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Oregon Earthquakes and Seismicity - Description
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Pacific Northwest Seismograph Network
-- Information, Maps, includes link to the University of Washington PNSN Website
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Pacific Northwest Seismograph Network - Oregon and Southern Washington
-- [Map,30K,InlineGIF]
-- Modified from: University of Washington Geophysics Program, 1999
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Pacific Northwest Seismograph Network - Washington and Oregon - Map
-- [Map,40K,InlineGIF]
-- Modified from:
University of Washington Geophysics Program, 1998
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Seismic Monitoring at Cascade Volcanic Centers, 2004 -- Status and Recommendations
-- Moran, 2005, USGS Scientific Investigations Report 2004-5211
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Terminology - Earthquakes and Seismicity
URL for CVO HomePage is:
<http://vulcan.wr.usgs.gov/home.html>
URL for this page is:
<http://vulcan.wr.usgs.gov/Volcanoes/Sisters/Seismicity/framework.html>
If you have questions or comments please contact:
<GS-CVO-WEB@usgs.gov>
05/25/06, Lyn Topinka
Useful Links - Oregon
-- includes Seismicity