Cascade Range Current Update |
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University of Washington, Pacific Northwest Seismograph Network, Seattle, Washington Volcanoes in the Cascade Range are all at normal levels of background seismicity except for Mount St. Helens. See Mount St. Helens update below. Other volcanoes include Mount Baker, Glacier Peak, Mount Rainier, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake, in Oregon; and Medicine Lake, Mount Shasta, and Lassen Peak in northern California. USGS Cascades Volcano Observatory, the Pacific Northwest Seismograph Network at the University of Washington, and the USGS Northern California Seismic Network and Volcano Hazards Team in Menlo Park, California, monitor the major volcanoes in the Cascade Range of northern California, Oregon, and Washington. Mount St. Helens Daily Update 9/28/04 6:30 PM PDT Throughout the day seismic activity has remained at a fairly constant, but high, rate of about 2 small (less than magnitude 2) earthquakes per minute. All earthquake locations are still shallow and in or below the lava dome. A USGS field crew continued their deployment of GPS equipment today in order to monitor any ground movement on the lava dome, crater floor, or lower slopes of the volcano. Tomorrow’s field work includes continued GPS deployments and another gas flight. USGS and PNSN personnel held a teleconference to discuss scientific issues and future needs. USGS and PNSN personnel also participated in a teleconference with Washington State and County emergency-management officials to discuss hazard and response issues. For past updates and September 26 Notice of Volcanic Unrest see past updates at:
A few photographs of recent fieldwork and of the volcano can be obtained from:
Daily updates of earthquake data and other information can be found on the WORLD WIDE WEB at URL:
and
http://www.pnsn.org/HELENS/welcome.html
Past Updates
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Return to:
[Cascade Range Current Activity Menu] ...
[Cascade Range Volcanoes and Volcanics Menu] ...
Go to:
[Mount St. Helens Current Activity Menu] ...
Link to:
[USGS Volcano Hazards Program Updates Page (includes Alaska, Hawaii, and Long Valley)] ...
[University of Washington's Pacific Northwest Earthquake Information (current seismicity)]
