SheehanDear Sheehan,
Steve Mattox, University of North Dakota
Source of Information: Christiansen, R.L., and Peterson, D.W., 1981, Chronology of the 1980 eruptive activity, in Lipman, P.W., and Mullineaux, D.R., eds., The 1980 eruptions of Mount St. Helens, Washington: U.S. Geological Survey Professional Paper 1250, p. 17-30.
Other Categories
Other Questions
To VolcanoWorld