GNGTS 2018 - 37° Convegno Nazionale

GNGTS 2018 S essione 1.3 245 Del Gaudio, C., Aquino, I., Ricciardi, G. P., Ricco, C. and Scandone R. (2010) Unrest episodes at Campi Flegrei: A reconstruction of vertical ground movements during 1905–2009, J. Volcanol. Geotherm. Res., 195(1), 48– 56;10.1016/j.jvolgeores.2010.05.014 (2010) De Siena, L., Chiodini, G., Vilardo, G., Pezzo, E., Castellano, M., Colombelli, S., and Ventura, G. (2017) Source and dynamics of a volcanic caldera unrest: Campi Flegrei, 1983–84. Scientific reports, 7(1), 8099 Di Vito, M. A. et al. Magma transfer at Campi Flegrei caldera (Italy) before the 1538 AD eruption. Scientific Reports 6, 32245 (2016) Lima, A., De Vivo, B., Spera, F. J., Bodnar, R. J., Milia, A., Nunziata, C., ... & Cannatelli, C. (2009). Thermodynamic model for uplift and deflation episodes (bradyseism) associated with magmatic–hydrothermal activity at the Campi Flegrei (Italy). Earth-Science Reviews, 97(1-4), 44-580 Papadimitriou, P., Kapetanidis, V., Karakonstantis, A., Kaviris, G., Voulgaris, N., & Makropoulos, K. (2015). The Santorini Volcanic Complex: a detailed multi-parameter seismological approach with emphasis on the 2011–2012 unrest period. Journal of Geodynamics, 85, 32-57. Patanè, D., Barberi, G., Cocina, O., De Gori, P. and Chiarabba, C. (2006) Time-resolved seismic tomography detects magma intrusions at Mount Etna, Science, 313(5788), 821–823. Rosi, M., and Sbrana, A. (1987) (Eds.). Phlegrean fields (Vol. 9). Consiglio nazionale delle ricerche. Vanorio, T., Virieux, J., Capuano, P. and Russo, G. (2005) Threedimensional seismic tomography from P wave and S wave microearthquake travel times and rock physics characterization of the Campi Flegrei Caldera, J. Geophys. Res., 110, 1-14. A HIGH RESOLUTION, MULTI-PARAMETRIC ANALYSIS TO IMAGE THE SHALLOW SOLFATARA CRATER IN CAMPI FLEGREI CALDERA (ITALY) G. De Landro 1 , S. Gammaldi 1 , V. Serlenga 1,2 , O. Amoroso 1,3 , G. Russo 1 , G. Festa 1 , L. D’Auria 4 , P.P. Bruno 5 , M. Gresse 6 , J. Vandemeulebrouck 4 , A. Zollo 1 1 University “Federico II”, Department of Physics “E. Pancini”, Napoli, Italy 2 Now at Institute of Methodologies for Environmental Analysis, Tito scalo, Italy 3 Now at Dipartimento di Fisica “E.R. Caianiello” Università di Salerno, Fisciano (SA), Italy 4 Instituto Volcanológico de Canarias (INVOLCAN), Tenerife, Spain 5 Petroleum Institute, Department of Petroleum Geosciences, Abu Dhabi, United Arab Emirates 6 ISTerre, Université Savoie Mont Blanc, Chambéry, France Introduction. Fluids play a key role in controlling and governing the evolution of magmatic processes and eruptions. A reliable imaging of fluid storages and accurate tracking of their movements within the crust is therefore crucial to evaluate the evolution of the volcanic activity and to assess the related hazard. The seismic tomography method can be used to obtain a reliable image of the elastic and anelastic properties of complex geological media. However, because of the hydrothermal system complexity, a multi-parametric analysis is required for an effective and robust tracking of fluids. Solfatara volcano is located within the Campi Flegrei, a still active caldera, which is characterized by periodic episodes of extended, low-rate ground subsidence and uplift episodes (bradyseisms), accompanied by intense seismic and geochemical activities. In particular, Solfatara is characterized by an impressive magnitude diffuse degassing [1], which underlines the relevance of fluid and heat transport at the crater and prompts for further research to improve the understanding of the hydrothermal feeding system. In this framework, an active seismic experiment, Repeated Induced Earthquake and Noise (RICEN, EU Project MEDSUV), was carried out between September 2013 and November 2014 to provide time-varying high-resolution images of the structure of Solfatara [2]. For this study we used the datasets provided by two different acquisition geometries: a) A 2D array covering an area of 90 x 115 m 2 sampled by a regular grid of 240 vertical sensors deployed on