caa a22 4500 475813480 CHVBK 20180406123803.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/PL00001054 doi (NATIONALLICENCE)springer-10.1007/PL00001054 1-D P-velocity Models of Mt. Vesuvius Volcano from the Inversion of TomoVes96 First Arrival Time Data [Elektronische Daten] [R. De Matteis, D. Latorre, A. Zollo, J. Virieux] —We applied a revised version of the 1-D τ-p inversion method to first P-arrival times from the active seismic experiment performed at Mt. Vesuvius (southern Italy) in 1996 (TomoVes96 Project). The main objective of this work is to obtain 1-D velocity models of Mt. Somma-Vesuvius volcano complex and surrounding area. Moreover we show that combining the 1-D information we provide a reliable 2-D initial model for perturbative tomographic inversions. Seismic and geological surveys suggest the presence of a refractor associated with the contrast between carbonate basement and volcanic/alluvial sediments; synthetic simulations, using a realistic topography and carbonate top morphology, allowed us to study the effect of topography on the retrieved velocity models and to check that the 1-D τ-p method can also approximately retrieve the refractor depth and velocity contrast. We analysed data from 14 on-land shots recorded at stations deployed along the in-profile direction. We grouped the obtained models in three subsets according to the geology of the sampling area: Models for carbonate outcrop area, models for the Campanian Plain surrounding the volcano edifice and models for Mt. Somma-Vesuvius volcano complex. The found 1-D P-velocity models show important vertical and lateral variations. Very low velocities (1.5-2.5 km/s) are observed in the upper 200-500 m thick shallow layer. At greater depths (3 km is the maximum investigated depth) P velocities increase to values in the range of 4-6 km/s which are related to the presence of the carbonatic basement. Finally we interpolated the 1-D models to demonstrate an example of misfit for a 2-D interpolated model whose residuals are confined in a narrow band around zero. Birkhäuser Verlag Basel,, 2000 De Matteis R. Università del Sannio, Benevento, Italy. E-mail: raffa@na.infn.it, IT aut Latorre D. Dipartimento di Scienze Fisiche, Università di Napoli "Federico II”, Napoli, Italy., IT aut Zollo A. Dipartimento di Scienze Fisiche, Università di Napoli "Federico II”, Napoli, Italy., IT aut Virieux J. Géoscience Azur, CNRS-UNR, Université de Nice-Sophia Antipolis, Valbone, France., FR aut https://doi.org/10.1007/PL00001054 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00001054 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- De Matteis R. Università del Sannio, Benevento, Italy. E-mail: raffa@na.infn.it, IT aut NATIONALLICENCE 700 1- Latorre D. Dipartimento di Scienze Fisiche, Università di Napoli "Federico II”, Napoli, Italy., IT aut NATIONALLICENCE 700 1- Zollo A. Dipartimento di Scienze Fisiche, Università di Napoli "Federico II”, Napoli, Italy., IT aut NATIONALLICENCE 700 1- Virieux J. Géoscience Azur, CNRS-UNR, Université de Nice-Sophia Antipolis, Valbone, France., FR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer