Pacific Coastal & Marine Science Center
Coastal and Marine Earthquake Studies
|Cascadia Earthquakes & Tsunami Hazard Studies
Volcanoes and Earthquake Hazards of Washington State
The Cascade Range is made up of numerous volcanoes such as Mt. Rainier pictured above and Mt. St. Helens pictured below. The magma that occasionally erupts is derived from melting of rocks pushed beneath the Earth's crust by the subduction process.
Learn more about Crustal Structure.