Mount St. Helens eruption, 1980


Two huge volcanic craters stand silent Sunday, March 30, 1980 after a morning of heavy activity on the summit of Mount St. Helens. Earlier blocks of ice 5 feet across were thrown from the craters. (AP Photo/Jack Smith)


Black smoke and ash drift skyward as Mount St. Helens erupts, sending a mushroom-shaped cloud more than 16,000 feet into the atmosphere on Sunday morning, March 30, 1980. (AP Photo)

Mount St. Helens erupts in Washington state, sending a plume of ash many miles skyward, May 19, 1980 (AP Photo/Jack Smith, File)

(Jack Smith)

Army Warrant Officer Charlie Wesler looks over the remains of a tent at a campsite near the Mount St. Helens volcano, May 23, 1980. The Army is assisting in the search for survivors. (AP Photo/Gary Stewart)

(Gary Stewart)

A car is shown submerged in ash in this May 20, 1980 from Mount St. Helen eruption in Washington State. (AP Photo)

Craig Knight of Portland sells respirator masks on a downtown Portland street, May 25, 1980, after Mount St. Helens erupted sending a plume of ash 40,000 feet into the air. Ash fell on the city. (AP Photo)


Ransom Tew, 71, of Portland, Ore., wears a protective surgical mask as he waits for the light in downtown Portland, May 26, 1980. Ash from Mount St. Helens blanketed the city causing some discomfort and snarling traffic. (AP Photo/Gary Stewart)

(Gary Stewart)

Bob Brown and his brother John attempt to lead 3 horses to safety out of the Weyerhaeuser 19 mile yard log in Kid Valley, Wash. The yard was flooded by the Toutle River following the eruption of Mount St. Helens (AP Photo/Gary Stewart)

KOIN 6 News photojournalist Jim Larson and his wife in May 1980, shortly before the eruption of Mount St Helens. (KOIN, file)

Lava dome continues to grow inside the crater of the volcano, Mount St. Helens, Oct. 29, 1980. The dome is about 1,000 feet across. Mount St. Helens is located 45 miles northeast of Portland, Oregon. (AP Photo/Jack Smith)

(Jack Smith)

The north side of Mount St. Helens is seen from the Johnston Ridge Observatory Saturday, May 6, 2000, in the Mount St. Helens National Volcanic Monument near Toutle, Wash.  (AP Photo/Elaine Thompson)


In this July 22, 1980 file photo, Mount St. Helens erupts in Washington State. (AP Photo/File)


Mount St. Helens, May 15, 2014 (KOIN)

Washington's Mount St. Helens shows the results of warmer weather by its slopes dwindling snowpack, seen from Council Crest Park in Portland, Ore., Thursday, July 15, 2010. (AP Photo/Don Ryan)

North Fork Toutle River valley, Mount St. Helens, Washington (USGS Photograph by L. Topinka in 1981)

Mount St. Helens, July 7, 2015 (KOIN)

A photo of Mount St. Helens from an aircraft in July 2015. (KOIN)

Mount St. Helens, July 7, 2015 (KOIN)

Spirit Lake in the foothills of Mount St. Helens. (Undated, USGS)