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1980 eruption of Mount St. Helens
On May 18, 1980, Mount St. Helens in Washington erupted. The eruption was recorded as a 5 on the Volcanic Explosivity Index. Throughout the two months before the eruption, there was a series of earthquakes and steam was vented from the mouth of the volcano. A total of 57 people died in the eruption. Including Harry R. Truman, who ran Spirit Lake, and volcano expert David A. Johnston.
- Fisher, Richard V.; Heiken, Grant; Hulen, Jeffrey (1998). Volcanoes: Crucibles of Change. Princeton University Press. p. 334. . https://books.google.com/?id=ZzZeWQ8vTPoC&pg=PA294.