Assessing the pyroclastic flow hazards from dome collapse at Soufrière Hills Volcano, Montserrat
Published:January 01, 2009
G. Wadge, 2009. "Assessing the pyroclastic flow hazards from dome collapse at Soufrière Hills Volcano, Montserrat", Studies in Volcanology: The Legacy of George Walker, T. Thordarson, S. Self, G. Larsen, S. K. Rowland, Á. Höskuldsson
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The probability of inundation of vulnerable areas by pyroclastic flows and surges generated by lava dome collapse at Soufriere Hills Volcano, Montserrat, is assessed. The runouts of the flows are simulated by two coupled one-dimensional models, the first representing the valley-following block-and-ash flows (avalanches) and the second the surges orthogonal to them. An ensemble of simulations is developed that honours the observed runout–frequency relationship of the flows and the likelihood of flows originating from a particular part of the dome. The former relationship is based on the observed eruption history from 1995 to 1998 and the second from 1995 to 2003. The avalanche component of the models is parameterized using a random selection from a library of triads of friction coefficients that produce simulation fits to field-observed flow deposits at 1 km runout increments.
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Studies in Volcanology: The Legacy of George Walker
Professor George Patrick Leonard Walker was one of the fathers of modern quantitative volcanology and arguably the foremost volcanologist of the twentieth century. In his long career, George studied a wide spectrum of volcanological problems and in doing so influenced almost every branch of the field. This volume, which honours his memory and his contributions to the field of volcanology, contains a collection of papers inspired by, and building upon, many of the ideas previously developed by George. Many of the contributors either directly studied under and worked with George, or were profoundly influenced by his ideas. The topics broadly fall under the three themes of lava flows and effusion, explosive volcanism, and volcanoes and their infrastructure.