Mount St. Helens, produced the largest recorded eruption in the continental United States when it erupted in 1980. Statistics place the likelihood of a major eruption in the Cascade Range at 2-3 per century.

Mount Rainier is listed as a Decade Volcano, or one of the 16 volcanoes on Earth with the greatest likelihood of causing loss of life and property if eruptive activity resumes. If Mount Rainier were to erupt as powerfully as Mount St. Helens did in its May 18, 1980 eruption, the effect