Saint Helens Mount

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Mount Saint Helens
volcanic eruption
May 18, 1980

Saint Helens

, Mount
A volcanic peak, 2,550 m (8,365 ft) high, of the Cascade Range in southwest Washington. On May 18, 1980, a violent eruption reduced its height by about 400 m (1,300 ft) and covered a large area with mud and ash.