Close Learning about the world under Mount St. Helens It's an experiment that involved thousands of sensors, underground explosive tests, and routine earthquakes under Mount St. Helens, and it's all to paint a picture of what's happening underground. KING 1:00 PM. PDT May 20, 2017 TRENDING VIDEOS Video shows fire damage around Columbia Gorge Players Who Knelt Gets Mixed Reactions Seahawks fans react to anthem protests Seahawks protest gets mixed reviews from fans Sky 8 video: Multnomah Falls after Eagle Creek Fire Trump mocks 'Rocket Man' Kim Jong Un Mom's boyfriend arrested for toddler's death Trump comments on protests spur response from football world Warren Moon discusses NFL player protests Sky 8 video: Oneonta Gorge after Eagle Creek Fire More Stories Gov. Kate Brown running for reelection in 2018 Sep 25, 2017, 9:43 a.m. North Korea: Trump's statement a 'declaration of war' Sep 25, 2017, 8:13 a.m. Blind pedestrian struck and killed in North Portland Sep 25, 2017, 7:44 a.m.