What scientists have learned from Mount St. Helens’ devastating eruption, 45 years later
4:33
PBSJohn Yang,Andrew Corkery,Gerard Edic
What scientists have learned from Mount St. Helens’ devastating eruption, 45 years later
It was 45 years ago today when Mount St. Helens erupted, triggering the biggest landslide in Earth’s recorded history and creating an ash cloud that reached across the country. John Yang looks back at the deadliest and most destructive volcanic eruption in U.S. history with Steve Olson, author of “Eruption: The Untold Story of Mount St ...
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The May 18, 1980, eruption of Mount St. Helens came after two months of small earthquakes. During the eruption, an avalanche of debris and mud spread for miles from the former summit, and a blast of steam and hot ash covered an area of about 600 km2 (230 mi2). In the decades since, scientists have studied the recovery of the ecosystem around the mountain using the Landsat series of satellites. By observing different wavelengths of light reflected of the surface, Landsat data can identify differe
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The May 18, 1980, eruption of Mount St. Helens came after two months of small earthquakes. During the eruption, an avalanche of debris and mud spread for miles from the former summit, and a blast of steam and hot ash covered an area of about 600 km2 (230 mi2). In the decades since, scientists have studied the recovery of the ecosystem around the mountain using the Landsat series of satellites. By observing different wavelengths of light reflected of the surface, Landsat data can identify differe
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