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Authors: Neri, M.*
Casu, F.*
Acocella, V.*
Solaro, G.*
Pepe, S.*
Berardino, P.*
Sansosti, E.*
Caltabiano, T.*
Lundgren, P.*
Title: Deformation and eruptions at Mt. Etna (Italy): A lesson from 15 years of observations
Other Titles: Deformation and eruptions at Mt. Etna
Title of journal: Geophysycal Research Letters
Series/Report no.: /36 (2009)
Publisher: American Geophysical Union
Issue Date: 28-Jan-2009
DOI: 10.1029/2008GL036151
Keywords: deformation
Mt. Etna
eruptive cycle
Abstract: Volcanoes deform as a consequence of the rise and storage of magma; once magma reaches a critical pressure, an eruption occurs. However, how the edifice deformation relates to its eruptive behavior is poorly known. Here, we produce a joint interpretation of spaceborne InSAR deformation measurements and volcanic activity at Mt. Etna (Italy), between 1992 and 2006. We distinguish two volcano-tectonic behaviors. Between 1993 and 2000, Etna inflated with a starting deformation rate of 1 cm yr 1 that progressively reduced with time, nearly vanishing between 1998 and 2000; moreover, low-eruptive rate summit eruptions occurred, punctuated by lava fountains. Between 2001 and 2005, Etna deflated, feeding higher-eruptive rate flank eruptions, along with large displacements of the entire East-flank. These two behaviors, we suggest, result from the higher rate of magma stored between 1993 and June 2001, which triggered the emplacement of the dike responsible for the 2001 and 2002–2003 eruptions. Our results clearly show that the joint interpretation of volcano deformation and stored magma rates may be crucial in identifying impending volcanic eruptions.
Appears in Collections:Papers Published / Papers in press
04.01.99. General or miscellaneous
04.01.02. Geological and geophysical evidences of deep processes
04.03.99. General or miscellaneous
04.03.06. Measurements and monitoring
04.03.07. Satellite geodesy
04.04.99. General or miscellaneous
04.04.09. Structural geology
04.04.12. Fluid Geochemistry
04.07.99. General or miscellaneous
04.07.02. Geodynamics
04.07.07. Tectonics
04.08.99. General or miscellaneous
04.08.01. Gases
04.08.03. Magmas
04.08.06. Volcano monitoring
04.08.07. Instruments and techniques
04.08.08. Volcanic risk
05.02.03. Volcanic eruptions

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