Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon.
Recent observations: Small earthquakes occurred at Mount St. Helens and Mount Rainier this week at rates typical of normal background activity. Three small earthquakes also occurred near South Sister volcano, where seismicity is generally low but not unprecedented. No unusual ground deformation or volcanic gas emissions were detected at any of the Cascade volcanoes. Geologists conducted field investigations at Mount Shasta, and a field reconnaissance flight at Mount Baker and Glacier Peak. A field crew deployed a network of temporary GPS stations in the Three Sisters area. The temporary network complements other monitoring of the area that occurs on a continuous basis. It has been deployed each summer since 2009 to track an episode of ground uplift that began in 1998 and is continuing at a very low level.
The U.S. Geological Survey and University of Washington continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted.
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July 04 , 2016. Cascades Range Volcanoes , United – States :
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
Source : CVO
Photo : Wikipedia