St. Helens Blog

2016 Winter Season is Here

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About Mount St. Helens

Mount St. Helens is part of the ring of fire encircling the Pacific Ocean. It was created and is continually being changed by the collision of the North American and the Juan de Fuca tectonic plates. Mount St. Helens is the youngest and most active Cascade Range volcano, born 40,000 years ago. It erupts roughly once each century.

After lying dormant for 123 years, Mount St. Helens again spewed steam and ash on March 27, 1980 – a prelude that put geologists on alert for a major volcanic event. But what occurred on May 18, 1980, went beyond what anyone had envisioned...

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