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<title lang=en>The Campi Flegrei Blind Test: Evaluating the Imaging Capability of Local Earthquake Tomography in a Volcanic Area</title>
<creator>Priolo, Enrico</creator>
<creator>Lovisa, Lara</creator>
<creator>Zollo, Aldo</creator>
<creator>Böhm, Gualtiero</creator>
<creator>D'Auria, Luca</creator>
<creator>Gautier, Stéphanie</creator>
<creator>Gentile, Francesco</creator>
<creator>Klin, Peter</creator>
<creator>Latorre, Diana</creator>
<creator>Michelini, Alberto</creator>
<creator>Vanorio, Tiziana</creator>
<creator>Virieux, Jean</creator>
<contributor>Istituto Nazionale di Geofisica e di Oceanografia Sperimentale (OGS), Trieste ; Université du Québec</contributor>
<contributor>Università degli studi di Napoli Federico II</contributor>
<contributor>Istituto Nazionale di Geofisica e di Vulcanologia (INGV), Roma ; Université du Québec</contributor>
<contributor>Transferts en milieux poreux ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Stanford Rock Physics Laboratory, Stanford University ; Université du Québec</contributor>
<contributor>Laboratoire de Géophysique Interne et Tectonophysique (LGIT) ; Observatoire des Sciences de l'Univers de Grenoble (OSUG) ; Université Joseph Fourier - Grenoble 1 (UJF) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS) - Université Joseph Fourier - Grenoble 1 (UJF) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS) - Laboratoire Central des Ponts et Chaussées (LCPC) - Institut des Sciences de la Terre (ISTerre) ; Université Joseph Fourier - Grenoble 1 (UJF) - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR) - Institut national des sciences de l'Univers (INSU - CNRS) - Institut de recherche pour le développement [IRD] : UR219 - PRES Université de Grenoble - Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) - Centre National de la Recherche Scientifique (CNRS) - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR) - Institut de recherche pour le développement [IRD] : UR219 - PRES Université de Grenoble - Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>ISSN: 1687-885X</source>
<source>EISSN: 1687-8868</source>
<source>International Journal of Geophysics</source>
<publisher>Hindawi Publishing Corporation</publisher>
<identifier>hal-00795584</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00795584</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00795584</source>
<source>International Journal of Geophysics, Hindawi Publishing Corporation, 2012, 2012, ID 505286, 37 p. 〈10.1155/2012/505286〉</source>
<identifier>DOI : 10.1155/2012/505286</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1155/2012/505286</relation>
<language>en</language>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<subject>[PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>During the 1982-1984 bradyseismic crises in the Campi Flegrei area (Italy), the University of Wisconsin deployed a network of seismological stations to record local earthquakes. In order to analyse the potential of the recorded data in terms of tomographic imaging, a blind test was recently set up and carried out in the framework of a research project. A model representing a hypothetical 3D structure of the area containing the Campi Flegrei caldera was also set up, and a synthetic dataset of time arrivals was in turn computed. The synthetic dataset consists of several thousand P- and S-time arrivals, computed at about fourteen stations. The tomographic inversion was performed by four independent teams using different methods. The teams had no knowledge of either the input velocity model or the earthquake hypocenters used to create the synthetic dataset. The results obtained by the different groups were compared and analysed in light of the true model. This work provides a thorough analysis of the earthquake tomography potential of the dataset recording the seismic activity at Campi Flegrei in the 1982-1984 period. It shows that all the tested earthquake tomography methods provide reliable low-resolution images of the background velocity field of the Campi Flegrei area, but with some differences. However, none of them succeeds in detecting the hypothetical structure details (i.e. with a size smaller than about 1.5-2 km), such as a magmatic chamber 4 km deep and especially the smaller, isolated bodies, which represent possible magmatic chimneys and intrusions.</description>
<date>2012-07-08</date>
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