GNGTS 2014 - Atti del 33° Convegno Nazionale

rilevare la presenza di zone in cui si registrano picchi di accelerazione di situ e le caratteristiche geomeccaniche del mezzo. In sintesi, il fine di questo studio è quello di definire il modo di sviluppo (longitudinale e trasversale) del campo di deformazione lungo la zona di taglio, ricostruire lo strain-field indotto dalla struttura, sviluppare un modello di distribuzione dello slip sul piano di faglia e conseguentemente modellare il ciclo sismico attraverso l’assegnazione degli opportuni parametri di resistenza. Ringraziamenti. Questo lavoro è stato finanziato con fondi DPC INGV V3_6 - 2012-2013 (responsabile C. Ferlito). Bibliografia Azzaro R, Bonforte A, Branca S, Guglielmino F, 2013. �� Geometry and kinematics of the fault systems controlling the unstable flank of Etna volcano (Sicily). � �� J Volcanol Geoth Res 251: 5-15 De Guidi G, Scudero S, Gresta S., 2012. �� New insights into the local crust structure of Mt. Etna volcano from seismological and morphotectonic data. J Volcanol Geoth Res , 223-224, 83–92. Firth C., Stewart I., McGuire W.M., Kershaw S. & Vita-Finzi C. (1996) - Coastal elevation changes in eastern Sicily: implications for volcano instability at Mount Etna. �� In: McGuire, W.M., Jones, A.P., Neuberg, J. (Eds.), Volcano Instability on the Earth and Other Planets. Geol. Soc. London, Spec. Publ., 110, 153–167 GudmundssonA, De Guidi G, Scudero S (2013). Length-displacement scaling and fault growth. TECTONOPHYSICS, vol. 608, p. 1298-1309, ISSN: 0040-1951, doi: 10.1016/j.tecto.2013.06.012 Guglielmino F, Bignami C, Bonforte A, Briole P, Obrizzo F, Puglisi G, Wegmüller U, 2011. Analysis of satellite and in situ ground deformation data integrated by the SISTEM approach: The April 3, 2010 earthquake along the Pernicana fault (Mt. Etna-Italy) case study. Earth and Planetary Plan Science Letters, 312(3), 327-336. Mc Farland FS, Lienkaemper JJ, Caskey SJ, 2013, Data from Theodolite Measurements of Creep Rates onSan Francisco Bay Region Faults, California, 1979-2013; U.S. Geological Survey Open-File Report2009–1119, v. 1.5, 18 p. and data files (Available at http://pubs.usgs.gov/of/2009/1119/of2009_1119v1.5 ) Monaco, C., Tapponier, P., Tortorici, L., Gyllot, P.Y., 1997. �� Late Quaternary slip rates on the Acireale-Piedimonte normal faults and tectonic origin of Mt. Etna (Sicily). Earth and Planetary Sciences Letters 147, 125-139. Monaco C., De Guidi G., Ferlito C., The Morphotectonic map of Mt.Etna, in Ital.J.Geosci. (Boll.Soc.Geol.It.), Vol.129, No.3 (2010), pp.408-428, 4 figs., 1 pl. f.t Okada T. (1985): Surface deformation due to shear and tensile faults in a half space. Bull Seism Soc. Am., 75: 1135- 1154. Rasà R, Azzaro R, Leonardi O, 1996) Aseismic creep on faults and flank instability at Mount Etna volcano, Sicily. Geol Soc London Sp Pub 110: 179-192. Riedel, W., 1929. Zur Mechanik geologischer Brucherscheinungen. Zentralblatt für Mineralogie Abteilung B, 354e368. Some results on attenuation tomography of Friuli Venezia Giulia Italian region S. Gentili, F. Gentile Centro di Ricerche Sismologiche, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Udine, Italy Introduction. In the present work we analyze the results achieved by the first attempt to apply 3D S waves attenuation tomography of Gentili and Gentile (2013) on the northernmost part of the Friuli Venezia Giulia Italian region and the westernmost Slovenia zone. The area under study is characterized by a complex tectonic deformation being �� in a convergent margin between Adria and Eurasia, where the African plate pushes the Eurasian one generating a rotation of the Adria microplate �� (Mantovani et al., �� 1996). In detail, the area is a poliphase deformational zone, resulting from the superposition of several Cenozoic-age tectonic phases (Venturini, 1991), with different orientation of the principal axes of stress. Each tectonic phase inherited and re-activated the geological deformations of the previous phase producing a GNGTS 2014 S essione 1.2 145