Mount St. Helens National Volcanic Monument
On May 18, 1980 Mount St. Helens, located in Southwest Washington State, erupted. Fifty seven people were killed, the debris field covered 230 square miles, and the plume of ash reached as far as Edmonton, Alberta. A large crater reduced the height of the mountain by 1300 feet. Today Mount St. Helens is a National Monument administered by the US Forest Service.