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USGS/Cascades Volcano Observatory, Vancouver, Washington

Mount St. Helens, Washington -
Summary of Mount St. Helens Seismic Activity,
September 2003

The following information is provided by the U.S. Geological Survey's Cascades Volcano Observatory and by the University of Washington's Geophysics Program. The U.S. Geological Survey and University of Washington monitor earthquakes and other activity at Mount St. Helens as part of the USGS Volcano Hazards Program.

Plot, Mount St. Helens Seismicity, Time vs. Depth
Mount St. Helens Seismicity - Time vs. Depth

Graph showing relationship between time and depth of earthquakes beneath Mount St. Helens from September 2002 through September 2003. In this graph, 0 depth is referenced to 1.5 kilometers (about 1 mile) below the current summit of Mount St. Helens (8,363 feet above sea level).

For More Information:
Link to: Mount St. Helens Seismicity Information -- Link courtesy University of Washington Geophysics Program


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10/03/03, Lyn Topinka