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  1. Mount St. Helens (known as Lawetlat'la to the indigenous 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.

  2. Learn about the history, activity, and hazards of Mount St. Helens, the most active volcano in the Cascade Range. Find maps, news, publications, and data on the volcano's eruptions, earthquakes, gas emissions, and more.

  3. Learn about the history, geology, and ecology of Mount St. Helens, a volcano that erupted in 1980 and created a 110,000-acre National Monument. Explore the visitor centers, trails, viewpoints, and recreation opportunities in this unique landscape.

  4. May 10, 2024 · 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.

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  5. May 18, 2024 · In 1980, Mount St. Helens erupted, killing dozens and forever changing how the US monitors earthquakes. The volcano is still active but not erupting.

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  7. Mar 9, 2018 · 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 Washington ...

  8. Oct 30, 2023 · At Mount St. Helens, over 400 earthquakes have been located by the Pacific Northwest Seismic Network since July 15, 2023. In late August to early September, about 40-50 earthquakes were located per week, and more recently, the number has been about 30 located earthquakes per week.

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