Multiphase-flow numerical modeling of the 18 May 1980 lateral blast at Mount St. Helens, USA
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Research Article| June 01, 2011 Multiphase-flow numerical modeling of the 18 May 1980 lateral blast at Mount St. Helens, USA T. Esposti Ongaro; T. Esposti Ongaro 1Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Via della Faggiola 32, 56126 Pisa, Italy Search for other works by this author on: GSW Google Scholar C. Widiwijayanti; C. Widiwijayanti 2Earth Observatory of Singapore, Nanyang Technological University, 50 Nanyang Avenue N2-01a-14, Singapore 639798 Search for other works by this author on: GSW Google Scholar A.B. Clarke; A.B. Clarke 1Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Via della Faggiola 32, 56126 Pisa, Italy3School of Earth and Space Exploration, Arizona State University, Tempe, Arizona 85287-1404, USA Search for other works by this author on: GSW Google Scholar B. Voight; B. Voight 4Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA5U.S. Geological Survey, Cascades Volcano Observatory, 1300 SE Cardinal Court, Vancouver, Washington 98683, USA Search for other works by this author on: GSW Google Scholar A. Neri A. Neri 1Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Via della Faggiola 32, 56126 Pisa, Italy Search for other works by this author on: GSW Google Scholar Geology (2011) 39 (6): 535–538. https://doi.org/10.1130/G31865.1 Article history received: 28 Oct 2010 rev-recd: 24 Jan 2011 accepted: 25 Jan 2011 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation T. Esposti Ongaro, C. Widiwijayanti, A.B. Clarke, B. Voight, A. Neri; Multiphase-flow numerical modeling of the 18 May 1980 lateral blast at Mount St. Helens, USA. Geology 2011;; 39 (6): 535–538. doi: https://doi.org/10.1130/G31865.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Volcanic lateral blasts are among the most spectacular and devastating of natural phenomena, but their dynamics are still poorly understood. Here we investigate the best documented and most controversial blast at Mount St. Helens (Washington State, United States), on 18 May 1980. By means of three-dimensional multiphase numerical simulations we demonstrate that the blast front propagation, final runout, and damage can be explained by the emplacement of an unsteady, stratified pyroclastic density current, controlled by gravity and terrain morphology. Such an interpretation is quantitatively supported by large-scale observations at Mount St. Helens and will influence the definition and predictive mapping of hazards on blast-dangerous volcanoes worldwide. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.Keywords:
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