论文信息 - Ashfall dispersal for the 16 September 1986, eruption of Lascar, Chile, calculated by a turbulent diffusion model

Ashfall dispersal for the 16 September 1986, eruption of Lascar, Chile, calculated by a turbulent diffusion model

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.

Stephen Self | Lori S. Glaze | S. Self | L. Glaze

[1] Stephen Self,et al. The 16 September 1986 eruption of Lascar volcano, north Chile: Satellite investigations , 1989 .

[2] R. Sparks,et al. Quantitative models of the fallout and dispersal of tephra from volcanic eruption columns , 1986 .

[3] R. S. J. Sparks,et al. The dimensions and dynamics of volcanic eruption columns , 1986 .

[4] P. Einarsson,et al. The Hekla eruption 1980–1981 , 1983 .

[5] Daniel Dzurisin,et al. Areal Distribution, Thickness, Mass, Volume, and Grain Size of Air-Fall Ash from the Six Major Eruptions of 1980 , 1981 .

[6] S. Chandrasekhar. Stochastic problems in Physics and Astronomy , 1943 .

[7] J. B. Knox,et al. A diagnostic model using ashfall data to determine eruption characteristic and atmospheric conditions during a major volcanic event , 1964 .

[8] G. Csanady. Turbulent Diffusion in the Environment , 1973 .

[9] M. Pareschi,et al. Renewal of explosive activity at Vesuvius: models for the expected tephra fallout , 1990 .

[10] Haraldur Sigurdsson,et al. Influence of particle aggregation on deposition of distal tephra from the MAy 18, 1980, eruption of Mount St. Helens volcano , 1982 .

[11] M. T. Pareschi,et al. A numerical model for simulation of tephra transport and deposition: Applications to May 18, 1980, Mount St. Helens eruption , 1988 .