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Authors: Bonasia, R.* 
Costa, A.* 
Folch, A.* 
Macedonio, G.* 
Capra, L.* 
Title: Numerical simulation of tephra transport and deposition of the 1982 El Chichón eruption and implications for hazard assessment
Issue Date: 2012
Series/Report no.: /231-232 (2012)
DOI: 10.1016/j.jvolgeores.2012.04.006
Keywords: Fallout deposit
1982 El Chichón eruption
Hazard assessment
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk 
Abstract: El Chichón volcano, Chiapas, Mexico, erupted explosively on March 29th, 1982, after a repose period of about 550 years. Amongst ten eruptive episodes documented between March 29th and April 4th, only the three that occurred on March 29th and April 4th produced significant pyroclastic tephra deposits. Here we use analytical (HAZMAP) and numerical (FALL3D) tephra transport models to reconstruct the deposits and the atmospheric plume dispersal associated with the three main fallout units of the 1982 eruption. On the basis of such a reconstruction, we produce hazard maps of tephra fallout associated to a Plinian eruption and discuss the implications of such a severe eruption scenario.
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