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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.
Mount Saint Helena (Wappo: Kanamota, "Human Mountain") [4] is a peak in the Mayacamas Mountains with flanks in Napa, Sonoma, and Lake counties of California. Composed of uplifted volcanic rocks from the Clear Lake Volcanic Field , it is one of the few mountains in the San Francisco Bay Area to receive any snowfall during the winter.
Then, on May 18, 1980, the dramatic eruption of Mount St. Helens shattered the quiet and brought the world's attention to the range. Geologists were also concerned that the St. Helens eruption was a sign that long-dormant Cascade volcanoes might become active once more, as in the period from 1800 to 1857 when a total of eight erupted.
View the Mount St. Helens Fast Facts on CNN and learn more about the volcano in Washington. ... 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Mail. Sign in ...
The three most recent were Lassen Peak from 1914 to 1921, a major eruption of Mount St. Helens in 1980, and a minor eruption of Mount St. Helens from 2004 to 2008. [25] In contrast, volcanoes in southern British Columbia, central and southern Oregon are currently dormant.
The Mount St. Helens Visitor Center at Silver Lake, about 30 miles (48 km) west of Mount St. Helens and five miles (8 km) east of Interstate 5 (outside the monument), opened in 1987 by then-Vice President George H.W. Bush. The center was formerly operated by the U.S. Forest Service and has been operated by Washington State Parks since October 2007.
Mount St. Helens, once the fifth-tallest peak in Washington State, lost about 1,300 feet from its height of 9,677, according to the USGS. The highest part of the crater rim on the southwestern ...
The ash cloud produced by the eruption, as seen from the village of Toledo, Washington, 35 mi (56 km) to the northwest of Mount St. Helens: The cloud was roughly 40 mi (64 km) wide and 15 mi (24 km; 79,000 ft) high. Ash cloud from Mt. St. Helens as captured by the GOES 3 weather satellite at 15:45 UTC.