USGS/Cascades Volcano Observatory, Vancouver, Washington
Mount St. Helens, Washington -
Earthquakes and Seismicity
- Current Activity
- Pacific Northwest Seismograph Network
- Terminology
- Background and Information
- Mount St. Helens Seismic Information
- 2003 Seismic Information
-
Yearly Seismic Activity - 2003
-- [Graphic,22K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
Mount St. Helens Monthly Updates
- 2002 Seismic Information
-
Yearly Seismic Activity - 2002
-- [Graphic,22K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
Mount St. Helens Monthly Updates
- 2001 Seismic Information
- 2000 Seismic Information
-
Yearly Seismic Activity - 2000
-- [Graphic,20K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
Mount St. Helens Monthly Updates
- 1999 Seismic Information
-
Yearly Seismic Activity - 1999
-- [Graphic,22K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
Mount St. Helens Monthly Updates
- 1998 Seismic Information
- 1997 Seismic Information
-
Yearly Seismic Activity - 1997
-- [Graphic,23K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
Mount St. Helens Monthly Updates
- 1996 Seismic Information
- 1995 Seismic Information
-
Yearly Seismic Activity - 1995
-- [Graphic,25K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level). -- Modified from: University of Washington's Geophysics Program
-
Mount St. Helens Monthly Updates
- Pre-1995 Seismic Information
-
Yearly Seismic Activity - 1980-1998
-- [Graphic,32K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
Yearly Seismic Activity - 1980-1996
-- [Graphic,32K,InlineGIF]
-- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
Summary of Important Seismic Events, March 20 - May 18, 1980
-- Excerpt from: Endo, et.al., 1981, IN: USGS Professional Paper 1250
- Yearly Seismicity - Graphics
- -- showing relationship between time and depth of earthquakes beneath Mount St. Helens. "0" depth is referenced to 1.5 km (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).
-- Modified from: University of Washington's Geophysics Program
-
2003
-- [Graphic,22K,InlineGIF]
-
2002
-- [Graphic,22K,InlineGIF]
-
2001
-- [Graphic,20K,InlineGIF]
-
2000
-- [Graphic,20K,InlineGIF]
-
1999
-- [Graphic,22K,InlineGIF]
-
1998
-- [Graphic,30K,InlineGIF]
-
1997
-- [Graphic,23K,InlineGIF]
-
1996
-- [Graphic,23K,InlineGIF]
-
1995
-- [Graphic,25K,InlineGIF]
-
1980-1998
-- [Graphic,32K,InlineGIF]
-
1980-1996
-- [Graphic,32K,InlineGIF]
- Maps and Graphics
- Items of Interest
-
Approximate event counts, by event type at five Cascade volcanoes, 1989-90
-- includes Mount St. Helens
-- Jonientz-Trisler, Myers, and Power, 1994, IN: USGS Bulletin 2047
-
Cascade Range Earthquakes and Seismicity
-- Description, includes Washington State Seismicity
-
Earthquakes and Seismicity, Signals and Tremor, Magnitude and Intensity
-- Descriptions
-- general information about Earthquakes and Seismicity
-
Historical Seismic Work at Mount St. Helens
-- Excerpt from: Endo, et.al., 1981, IN: USGS Professional Paper 1250
-
Locations, Magnitudes, and Statistics of the March 20 - May 18 Earthquake Sequence
-- Endo, et.al., 1981, IN: USGS Professional Paper 1250
-
Monitoring Mount St. Helens Volcano - An Introduction
-- includes Seismicity
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Monthly Updates
-- includes seismicity
-
Pacific Northwest Seismograph Network
-- Information, Maps, includes link to the University of Washington PNSN Website
-
Post-May 18 Seismicity; Volcanic and Tectonic Implications
-- Weaver, et.al., 1981, IN: USGS Professional Paper 1250
-
RSAM (Real-Time Seismic-Amplitude Measurement) and SSAM (Seismic Spectral-Amplitude Measurement) Systems
-- Description
-
Seismic Identification of Gas-and-Ash Explosions at Mount St. Helens -- Capabilities, Limitations, and Regional Application
-- Jonientz-Trisler, Myers, and Power, 1994, IN: USGS Bulletin 2047
-
Seismic Studies 1980 - 1983
-- Excerpt from: Brantley and Topinka, 1984, Earthquake Information Bulletin, v.16, n.2
-
Summary of Important Seismic Events, March 20 - May 18, 1980
-- Excerpt from: Endo, et.al., 1981, IN: USGS Professional Paper 1250
- Useful Links
URL for CVO HomePage is:
<http://vulcan.wr.usgs.gov/home.html>
URL for this page is:
<http://vulcan.wr.usgs.gov/Volcanoes/MSH/Seismicity/framework.html>
If you have questions or comments please contact:
<GS-CVO-WEB@usgs.gov>
02/19/04, Lyn Topinka