Mount St. Helens (known as Lawetlat'la to the local Cowlitz people, and Loowit or Louwala-Clough to the Klickitat) is an active stratovolcano located in Skamania County, Washington, [1] in the Pacific Northwest region of the United States. It lies 52 miles (83 km) northeast of Portland, Oregon, [2] and 98 miles (158 km) south of Seattle. [3] .

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.

Mount Saint Helens, volcanic peak in the Cascade Range, southwestern Washington, U.S. Its eruption on May 18, 1980, was one of the greatest volcanic explosions ever recorded in North America. A total of 57 people and thousands of animals were killed in the event.

2024年9月30日 · 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. Summer: See detailed hours below - Operating hours vary. Winter: Closed Sept. 30, 2024 - through mid-May 2025.

2023年10月30日 · 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.

2018年3月9日 · Mount St. Helens is a volcano located in southwestern Washington state. It’s the most active volcano in the Cascade Range, a mountain range that extends from British Columbia through...

2023年11月2日 · The Mount St. Helens National Volcanic Monument is within the Gifford Pinchot National Forest and managed by the USDA Forest Service. The Monument was established in 1982 to designate 445 km 2 (110,000 acres) around Mount St Helens for research, recreation, and education. Within its boundaries, the area that was impacted by the cataclysmic ...

Mount St. Helens (8,364 feet, 9,677 feet before May 18, 1980) is located in southwestern Washington about 50 miles northeast of Portland, Oregon, and is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest.

Mount St. Helens is a volcano in the U.S. state of Washington.It is 96 miles (154 km) south of Seattle and 53 miles (85 km) northeast of Portland, Oregon.The volcano is in Cascade Range of mountains.It is part of the Cascade Volcanic Arc in the Pacific Ring of Fire that includes over 160 active volcanos.This is a deadly volcano. Mount St. Helens was first called Louwala-Clough, …

2023年11月9日 · Over its rich and complex 275,000-year history, Mount St. Helens has produced both violent explosive eruptions of volcanic tephra and relatively quiet outpourings of lava.