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 7:11 PM. PDT May 19, 2017 TRENDING VIDEOS Flyer raises concerns in Kent School District VERIFY: Are strangers following you on Facebook? NOW: LulaRoe or LulaNO? U.S. Airlines to end 747 passengar flights Experts warn of phony calls to steal money Fans rally for Colin Kaepernick 9/22 High School Sports Blitz Police union gives response on FBI investigation Homeowners claim new road hurts neighborhood Health Link More Stories Seahawks players, organization respond to Trump's… Sep 23, 2017, 12:12 p.m. Dogs found safe after stolen RV recovered in Lacey Sep 22, 2017, 11:35 p.m. Why do we have seasons? Sep 21, 2017, 1:51 p.m.