Cascade Range Current Update

U.S. Geological Survey, Vancouver, Washington University of Washington, Pacific Northwest Seismic Network, Seattle, Washington U.S. Geological Survey, Northern California Seismic Network, Menlo Park, California CASCADES VOLCANO OBSERVATORY WEEKLY UPDATEFriday, February 5, 2010 9:30 AM PST (Friday, February 5, 2010 17:30 UTC) CASCADE RANGE VOLCANOES Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake volcano, Mount Shasta, and Lassen Peak in northern California. Mount St. Helens has been at Volcano Alert Level NORMAL (Aviation Color Code GREEN) since July 10, 2008. Recent Observations: Cascade Range volcano seismicity and deformation remained at background levels during the past week. No field work was scheduled. Recent upgrades to the Pacific Northwest continuous GPS network operated by the Plate Boundary Observatory (http://pboweb.unavco.org/) came online this week, enabling scientists to better monitor ground deformation in real time. Past Updates Mount St. Helens Current Eruption Menu

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