Search results
- www.fs.usda.gov
- › …
- › USDA Forest Service Managed National Monuments
A vast, gray landscape lay where once the forested slopes of Mount St. Helens grew. In 1982 the President and Congress created the 110,000-acre National Volcanic Monument for research, recreation, and education. Inside the Monument, the environment is left to respond naturally to the disturbance.
Mount St. Helens is primarily an explosive dacite volcano with a complex magmatic system. The volcano was formed during four eruptive stages beginning about 275,000 years ago and has been the most active volcano in the Cascade Range during the Holocene.
On March 27, 1980, a series of volcanic explosions and pyroclastic flows began at Mount St. Helens in Skamania County, Washington, United States.
Mount St. Helens, located in Washington State, is the most active volcano in the Cascade Range, and it is the most likely of the contiguous U.S. volcanoes to erupt in the future. By. Cascades Volcano Observatory, Mount St. Helens. November 8, 2023. Eruption History of Mount St. Helens through start of Holocene.
Jun 6, 2019 · There are several Mount St. Helens visitor centers located along State Highway 504, which is the main route into the National Volcanic Monument. Each offers different educational exhibits and viewing opportunities, along with shops, refreshments, and restrooms. Most offer access to trails.
Functioning as the gateway to the National Forest Service monument, Mount St Helens Visitor Center will entice you with scientific displays, a movie theatre and educational opportunities.
May 18, 2020 · Over the past 4,000 years, Mount St. Helens has been the most prolific volcano in the Cascades, erupting in a dizzying array of styles, from ear splitting explosions to rivers of lava. But by...
