1980 eruption of Mount St. Helens

volcanic eruption

On May 18, 1980, Mount St. Helens in Washington erupted. The eruption was recorded as a 5 on the Volcanic Explosivity Index.[1] 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.

Photograph of the eruption column, May 18, 1980.


  1. Fisher, Richard V.; Heiken, Grant; Hulen, Jeffrey (1998). Volcanoes: Crucibles of Change. Princeton University Press. p. 334. ISBN 0-691-00249-5.