Mount St. Helens
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Picture of Mount St. Helens National Volcanic Monument
Picture of Mount St. Helens National Volcanic Monument, as seen from Gifford Pinchot National Forest, Washington


On May 18, 1980, the long-dormant Mount St. Helens erupted. Shaken by an earthquake measuring 5.1 on the Richter scale, the north face of this tall, symmetrical mountain collapsed in a massive avalanche of rock debris. Within moments, this slab of rock and ice slammed into Spirit Lake, crossed a ridge 1,300 feet high, and roared 14 miles down the Toutle River. The eruption lasted nine hours, but Mount St. Helens and the surrounding landscape were dramatically changed within moments. A vast, gray landscape lay where once the forested slopes of Mount St. Helens grew. Read More »

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