Aug. 27, 1982 National MonumentAugust 27, 19821987 Sediment Dam BuiltJune 1, 1987 1987 Summit Reopens Volcano summit reopened to recreational climbing. MtStAdmin Related postsJuly 13, 2008July 13, 2008 Eruptions EndRead moreFebruary 13, 2008Early 2008 Dome BuildingRead moreMay 13, 20052005 – Present Seismic Activity ResumesRead more Leave a Reply Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.