6 Questions
What was the date of the major explosive eruption at Mount St. Helens?
May 18, 1980
How many people were killed as a result of the Mount St. Helens eruption in 1980?
57
What triggered the massive debris avalanche at Mount St. Helens?
Magnitude 5.1 earthquake
What was the volume of the debris avalanche that resulted from the Mount St. Helens eruption?
0.6 cubic miles
How did aquatic ecosystems in the area near Mount St. Helens respond to the eruption?
They greatly benefited from the ash
What is the current elevation of Mount St. Helens after the 1980 eruption?
8,363 ft (2,549 m)
Test your knowledge on the 1980 Mount St. Helens eruption in Washington, United States, including the series of volcanic explosions, pyroclastic flows, and the significant impacts on the surrounding area.
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