What made the mountain move
The natural factors that caused the deadly mudslide March 22 in rural Washington are also complicating the search for people and property. Geology, climate and the terrain all worked against this little ridge along the Stillaguamish River, site of many previous slides. Read related article.
Sources: Geologist Rex Baum of USGS, National Weather Service, Washington State Department of Natural Resources. By Bonnie Berkowitz;Todd Lindeman and Gene Thorp.