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GEOREF RECORD

MAGFLOW; a physics-based model for the dynamics of lava-flow emplacement

Annalisa Cappello, Alexis Herault, Giuseppe Bilotta, Gaetana Ganci and Ciro Del Negro
MAGFLOW; a physics-based model for the dynamics of lava-flow emplacement (in Detecting, modelling and responding to effusive eruptions, J. L. Harris (editor), T. de Groeve (editor), F. Garel (editor) and S. A. Carn (editor))
Special Publication - Geological Society of London (July 2015) 426 (1): 357-373

Abstract

The MAGFLOW model for lava-flow simulations is based on the cellular automaton (CA) approach, and uses a physical model for the thermal and rheological evolution of the flowing lava. We discuss the potential of MAGFLOW to improve our understanding of the dynamics of lava-flow emplacement and our ability to assess lava-flow hazards. Sensitivity analysis of the input parameters controlling the evolution function of the automaton demonstrates that water content and solidus temperatures are the parameters to which MAGFLOW is most sensitive. Additional tests also indicate that temporal changes in effusion rate strongly influence the accuracy of the predictive modelling of lava-flow paths. The parallel implementation of MAGFLOW on graphic processing units (GPUs) can achieve speed-ups of two orders of magnitude relative to the corresponding serial implementation, providing a lava-flow simulation spanning several days of eruption in just a few minutes. We describe and demonstrate the operation of MAGFLOW using two case studies from Mt Etna: one is a reconstruction of the detailed chronology of the lava-flow emplacement during the 2006 flank eruption; and the other is the production of the lava-flow hazard map of the persistent eruptive activity at the summit craters.


ISSN: 0305-8719
EISSN: 2041-4927
Coden: GSLSBW
Serial Title: Special Publication - Geological Society of London
Serial Volume: 426
Serial Issue: 1
Title: MAGFLOW; a physics-based model for the dynamics of lava-flow emplacement
Title: Detecting, modelling and responding to effusive eruptions
Author(s): Cappello, AnnalisaHerault, AlexisBilotta, GiuseppeGanci, GaetanaDel Negro, Ciro
Author(s): Harris, J. L.editor
Author(s): de Groeve, T.editor
Author(s): Garel, F.editor
Author(s): Carn, S. A.editor
Affiliation: Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Catania, Italy
Pages: 357-373
Published: 20150730
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
Number of pages: 17
References: 55
Accession Number: 2015-093793
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables
N37°45'00" - N37°45'00", E15°01'00" - E15°01'00"
Source Note: Online First
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201540
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