Mount Saint Helens Videos from USGS

 Mount Saint Helens Videos from USGS

Recounting a 30-year history of eruptions and monitoring

Videos released in May 2010 by the United States Geological Survey.

Video: United States Geological Survey scientists involved in responding to the 1980 eruption of Mount St. Helens recount their experience, explain the impact of the eruption, its magnitude, and what they learned about volcanoes. USGS video.

Mount St. Helens Background

Mount St. Helens is a stratovolcano located in southern Washington, in the western part of the Cascade Mountain Range. It is about 100 miles south of Seattle, Washington and 50 miles northeast of Portland, Oregon. It is an eruptive volcanic cone built up of interlayered ash, pumice, lava flows, volcanic domes and other deposits. It is a young volcano. The first eruptions occurred about 40,000 years ago and it grew in a series of eruptive stages.