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Ashfall dispersal for the 16 September 1986, eruption of Lascar, Chile, calculated by a turbulent diffusion model
Jet Propulsion Laboratory, California Institute of Technology
Department of Geology and Geophysics, University of Hawaii
A two dimensional model for the dispersal of volcanic ash, modified from that of Suzuki [1983], is applied to the 16 September 1986, eruption of Lascar, in northern Chile. The result is an isopach map predicting ground concentrations of ash. The map shows two local maxima along distinct dispersal axes and predicts that the deposit was detached from the source. Predicted concentrations are in agreement with a single reported thickness measurement.
Received 5 April 1991; accepted 13 May 1991; .
Citation: (1991), Ashfall dispersal for the 16 September 1986, eruption of Lascar, Chile, calculated by a turbulent diffusion model, Geophys. Res. Lett., 18(7), 1237–1240.
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