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Mount St. Helens or
Louwala-Clough (known as
Lawetlat'la to the indigenous
Cowlitz people, and
Loowit to the
Klickitat) is an active
stratovolcano located in
Skamania County, Washington, in the
Pacific Northwest region of the United States. It is 96 miles (154 km) south of
Seattle,
Washington, and 50 miles (80 km) northeast of
Portland, Oregon. Mount St. Helens takes its English name from the British diplomat
Lord St Helens, a friend of explorer
George Vancouver who made a survey of the area in the late 18th century.
[1] The volcano is located in the
Cascade Range and is part of the
Cascade Volcanic Arc, a segment of the
Pacific Ring of Fire that includes over 160 active volcanoes. This volcano is well known for its
ash explosions and
pyroclastic flows.
Mount St. Helens is most notorious for
its major 1980 eruption, the deadliest and most economically destructive volcanic event in the history of the United States.
[2] Fifty-seven people were killed; 250 homes, 47 bridges, 15 miles (24 km) of railways, and 185 miles (298 km) of highway were destroyed. A massive
debris avalanche triggered by an earthquake measuring 5.1 on the Richter scale caused an eruption
[3] that reduced the elevation of the mountain's summit from 9,677 ft (2,950 m) to 8,363 ft (2,549 m), leaving a 1 mile (1.6 km) wide horseshoe-shaped crater.
[4] The debris avalanche was up to 0.7 cubic miles (2.9 km3) in volume.
The
Mount St. Helens National Volcanic Monument was created to preserve the volcano and allow for its aftermath to be scientifically studied.
As with most other volcanoes in the Cascade Range, Mount St. Helens is a large eruptive cone consisting of
lava rock interlayered with ash,
pumice, and other deposits. The mountain includes layers of
basalt and
andesite through which several
domes of
dacite lava have erupted. The largest of the dacite domes formed the previous summit, and off its northern flank sat the smaller Goat Rocks dome. Both were destroyed in the 1980 eruption.
Source: Wikipedia
The model is created at a scale of 1:50,000 with 1.75x vertical exaggeration. It features a built-in base, so it sits perfectly on a desk or in a frame.
Model Data Sources: USDA / USGS