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USGS/Cascades Volcano Observatory, Vancouver, Washington


Cascade Range Current Update

Submitted at 16:15 PDT, September 8, 2001

Volcanoes in the Cascade Range are all at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount Adams, and Mount St. Helens 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.

Information about the recent detection of a slight uplift of a broad area west of South Sister volcano can be found in the update of May 8, 2001. A seismic signal on September 4, 2001, located just north of the uplift area was generated by blasting at a rock quarry along U.S. 20 near Santiam Pass and was not related to geologic activity as reported by some media groups.

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.



Click button for Past Cascade Range Updates Past Updates


Return to:
[Cascade Range Current Activity Menu] ...
[Cascade Range Volcanoes and Volcanics 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)]



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09/13/01, Lyn Topinka