Skip to main content
U.S. flag

An official website of the United States government

Maps

Filter Total Items: 91

Physiographic diagrams of the May 18, 1980, landslide-eruption of Mount St. Helens, Washington

This sequence of diagrams shows the complex series of events that culminated in the catastrophic eruption of Mount St. Helens on the morning of May 18, 1980.