How tall was Mt. St. Helens before and after the eruption?

rocky Rose Beer

Dear Rose,

The summit elevation was 9,760 feet (2,975 m) before the eruption. After the eruption the elevation of the new summit was about 8,525 feet (2,600 m).

Steve Mattox, University of North Dakota

Source of Information:
McClelland, L., Simkin, T., Summers, M., Nielson, E., Stein, T.C., 1989, Global volcanism 1975-1985: Prentice Hall, Englewood Cliffs, New Jersey, and American Geophysical Union, Washington DC, 655 p. 

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