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Photo ID: h32jgi	Subject: Volcanoes	Description
	Active Volcanoes; Ash Clouds; Cascade Range; Ejecta; Eruptions; Explosive Eruptions; Stratovolcanoes; Volcanic Debris; Volcanism; Volcanology	For more than 9 hours a vigorous plume of ash erupted from Mt. St. Helens, eventually reaching 12 to 15 miles above sea level. The plume moved eastward at an average speed of 60 miles per hour, with ash reaching Idaho by noon. By early May 19, 1980, the devastating eruption was over. Shown here is a close-up view of the May 19 ash plume.
	Photographer	Location
	USGS CVO Credit Line: Courtesy USGS Cascade Volcano Observatory	North America; United States; Washington; Mount Saint Helens
Photo Quality \| Large	Available for Commercial Use