The effect of seismic activities is one of the crucial issues that needs to be analyzed in evaluating the stability of a volcanic edifice. The seismicity can be related to tectonic activity or due to magma migration mechanisms. The aim of this work is to analyze the effects of seismic events associated to magma migration mechanisms on the stability of the Stromboli volcano flanks, coupling the dynamic analysis with the effects of the magma pressure in the feeding conduits. It was performed by two-dimensional finite difference numerical modeling (FLAC 5.0, Itasca). The dynamic input was applied on both sides of the magmatic conduit, extended vertically below the active crater zone. In accordance with the evidences provided by the geophysical data, the dynamic source has been located between 300 and 700 meters. The effects of the dynamic perturbation are analyzed in terms of displacements vectors, strain increments and pore pressure variations.
Effects of volcanic seismic events on the Stromboli stability by finite difference numerical modeling / T. Apuani, A. Merri, M. Masetti - In: Proceedings of the International Workshop on Volcanic Rocks, 11th ISRM Congress, Ponta Delgada, Azores, Portugal[s.l] : Taylor & Francis/Balkema, 2007. - ISBN 978-0-415-45140-6. - pp. 101-109 (( Intervento presentato al 11. convegno International Workshop on Volcanic Rocks, 11th ISRM Congress tenutosi a Ponta Delgada, Azores, Portugal nel 2007.
Effects of volcanic seismic events on the Stromboli stability by finite difference numerical modeling
T. Apuani;A. Merri;M. Masetti
2007
Abstract
The effect of seismic activities is one of the crucial issues that needs to be analyzed in evaluating the stability of a volcanic edifice. The seismicity can be related to tectonic activity or due to magma migration mechanisms. The aim of this work is to analyze the effects of seismic events associated to magma migration mechanisms on the stability of the Stromboli volcano flanks, coupling the dynamic analysis with the effects of the magma pressure in the feeding conduits. It was performed by two-dimensional finite difference numerical modeling (FLAC 5.0, Itasca). The dynamic input was applied on both sides of the magmatic conduit, extended vertically below the active crater zone. In accordance with the evidences provided by the geophysical data, the dynamic source has been located between 300 and 700 meters. The effects of the dynamic perturbation are analyzed in terms of displacements vectors, strain increments and pore pressure variations.
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