Volcanoes in Our Times

The nine-hour eruption of Washington's Mount St. Helens resulted in the largest debris avalanche in recorded history. Fifty-seven people were killed by the blast, making it the deadliest volcanic event in US history.
Corbis

Mount St. Helens, USA
Eruption : 1980
The nine-hour eruption of Washington's Mount St. Helens resulted in the largest debris avalanche in recorded history. Fifty-seven people were killed by the blast, making it the deadliest volcanic event in US history.

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