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"The 1980 Mount St. Helens Eruption". Archived from the original on 14 July 2014. Mount St Helens (audio slideshow). Archived from the original on 14 July 2014. Volcanologist Sarah Henton discusses the Cascade Mountains and explains the geology and impact of the 1980 Mount St Helens eruption. (duration 6:29 min) Mount St. Helens (3D model).
Harry R. Truman (October 1896 – May 18, 1980) was an American businessman, bootlegger, and prospector.He lived near Mount St. Helens, an active volcano in the state of Washington, and was the owner and caretaker of Mount St. Helens Lodge at Spirit Lake near the base of the mountain.
The 2004–2008 volcanic activity of Mount St. Helens in Washington, United States has been documented as a continuous eruption in the form of gradual extrusion of magma. Starting in October 2004 and ceasing in January 2008, a new lava dome was built up.
More than 400 earthquakes have been detected beneath Washington's Mount St. Helens in recent months, though there are no signs of an imminent eruption, according to the U.S. Geological Survey.
To compare, Mt. St. Helens' eruption in 1980 was a level 4. Known as a super eruption for its magnitude, the event emptied out enough volcanic material to produce the 30-by-40-mile-wide caldera.
The short film Eruption of Mount St. Helens, 1980 (1981) is available for free viewing and download at the Internet Archive. The short film This place in time: The Mount St. Helens story (1984) is available for free viewing and download at the Internet Archive. Aerial pictures of the July 22nd, 1980 secondary eruption
Over 400 earthquakes have been detected beneath Washington's Mount St. Helens in recent months, though there are no signs of an imminent eruption.
Virginia Dale, a renowned scientist with local ties, has again returned along with her ecological research team to sites catastrophically destroyed in the May 18, 1980 eruption of Mount St. Helens.
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