The Columbia River defines the Pacific Northwest, from gigantic floods to thousands of shipwrecks, to the bucolic lake in the Canadian Rockies where the journey of the river begins. On the new Mossback Northwest special, we're revisiting last season's four-episode arc exploring the history and geology of the mighty Columbia River - putting a whole new perspective on "Roll On, Columbia." Mossback's Northwest: The Mighty Columbia River premieres Wednesday, April 2 at 7 PM and on the Cascade PBS ap

This week, all volcanoes in the Cascade Range of Washington and Oregon are at normal background levels of activity. Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN Weekly Update: https://www.usgs.gov/programs/VHP/volcano-updates#cvo Past Week Observations: Small magnitude earthquakes were detected at Mount Baker, Mount Rainier, Mount St. Helens, and Newberry. All monitoring data are consistent with background activity levels in the Cascades Range. Field crews were at Mount

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This week, all volcanoes in the Cascade Range of Washington and Oregon are at normal background levels of activity. Current Volcano Alert Level: NORMAL Current Aviation Color Code: GREEN Weekly Update: http://ow.ly/qoOe50IW5LI Recent Observations: During the past week, earthquakes were located at Mount St. Helens, Mount Rainier, and Mount Hood; these observations are consistent with background seismicity levels at each volcano. Field crews traveled to Newberry to make gas measurements this week.