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.
Over the past week, small earthquakes (less than M1) continued to occur beneath Mount St. Helens, ranging in depth from 1 to 9 km. A few earthquakes of similar magnitudes were detected at Mounts Hood and Rainier at depths of 0 to 2 km. Intermittent small magnitude earthquakes are par for the course at these volcanoes. Other parameters that we monitor, such as ground deformation and gas release, remain at background levels. Field crews spent time at Mount St. Helens conducting river channel surveys.
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.
May 29, 2016. Cascade Range , United States :
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
Source : CVO
Photo : Summitpost