GNGTS 2019 - Atti del 38° Convegno Nazionale

62 GNGTS 2019 S essione 1.1 aseismic deformation of the Fiandaca Pennisi shear zone on 26 December 2018, M = 4.9 and Pernicana Fault on 9th January 2019 M = 4.1). The remote survey allowed us to better define the geometry of the Fiandaca Pennisi Fault, characterised by trending N130° E in the north- western portion and N160° E in the southern part. Morphostructural analysis data coupled with satellite interferometric information indicate very detailed distribution of surface deformations with structures interpreted as Riedel’s R or T type fractures in a right lateral shear zone. From the kinematic point of view, both morphostructural and seismological data, accompanied by geodetic information, indicate a dextral strike slip movement with WNW-ESE extensional component. The developed Co-seismic rupture length (Gudmundsson et al. , 2013), corresponds to modelled seismogenic thickness with maximum rupture lengths of about 6–6.5 km (De Guidi et al. , 2012). The analysis of the results highlighted the relationships between the behaviour of thinned seismogenic layer and surface field deformation along well-known fault systems. Future objectives will be to characterise slow damage effect induced by anomalous long-term post seismic surface deformation. References Alparone S., Barberi G., Cocina O., Giampiccolo E., Musumeci C. and Patanè D.; 2012: Intrusive mechanism of the 2008-2009 Mt. Etna eruption: constraints by tomographic images and stress tensor analysis . Journal Volcanology Geothermal Research, 229, 50-63. https://doi.org/10.1016/j.jvolgeores.2012.04.001. Boresi A. P., Schmidt R. J. and Sidebottom, O. M.; 1985: Advanced mechanics of materials (Vol. 6) . New York et al. : Wiley. De Guidi G., Scudero S. and Gresta S.; 2012: New insights into the local crust structure of Mt. Etna volcano from seismological and morphotectonic data . Journal of Volcanology and Geothermal Research, 223, 83-92. De Guidi G., Vecchio A., Brighenti F., Caputo R., Carnemolla F., Di Pietro A., Lupo M., Maggini M., Marchese S., Messina D., Monaco M. and Naso S.; 2017: Brief communication: Co-seismic displacement on 26 and 30 October 2016 (M w= 5: 9 and 6.5) - earthquakes in central Italy from the analysis of a local GNSS network . Natural Hazards and Earth System Sciences, 17(11). De Guidi G., Brighenti B., Carnemolla F., Imposa S., Marchese S. A., Palano M., Scudero S. and Vecchio A.; 2018: The unstable eastern flank of Mt. Etna volcano (Italy): First results of a GNSS-based network at its southeastern edge . Journal of Volcanology and Geothermal Research, 357, 418-424. Griffith A. A; 1921: VI. The phenomena of rupture and flow in solids . Philosophical transactions of the royal society of london. Series A, containing papers of a mathematical or physical character, 221(582-593), 163-198. Gruppo Analisi Dati Sismici; 2019: Catalogo dei terremoti della Sicilia Orientale - Calabria Meridionale (1999- 2019) . INGV, Catania Mercier J., and Vergely P.; 1995: Tettonica: lezioni di geologia strutturale . Pitagora. Monaco C., Barreca G., Brighenti F., De Guidi G., Carnemolla F., Mattia M., Menichetti M., Roccheggiani M. and Scarfi L.; 2019: Multidisciplinary survey methods of the Fiandaca Pennisi-Pennisi fault zone reactivated during the 26th December 2018 coseismic and postseismic event . Tools, Data and Models for 3D Seismotectonics: The Italian over Time Laboratory - A “CRUST” INTERDISCIPLINARY WORKSHOP IN MEMORY OF GIAMPAOLO PIALLI. Perugia, 9-10 July 2019. Riedel W.; 1929: Zur Mechanik geologischer Brucherscheinungen ein Beitrag zum Problem der Fiederspatten . Zentbl. Miner. Geol. Palaont. Abt., 354-368. Scarfì L., Messina A., Cassisi C.; 2013: Sicily and Southern Calabria focal mechanism database: a valuable tool for the local and regional stress field determination . Annals of Geophysics, 56, 1, https://doi: 10.4401/ag-6109. Soutas-Little R. W; 1973: Elasticity Dover Publications Mineola. Tsuchida E. and Nakahara I.; 1970: Three-Dimentsional Stress Concentration around a Spherical Cavity in a Semi- Infinite Elastic Body . Bulletin of JSME, 13(58), 499-508. Zhang H., Thurber C. and Bedrosian P.; 2009: Joint inversion for Vp, Vs, and Vp/Vs at SAFOD, Parkfield, California . Geochem. Geophys. Geosyst. 10 (Q110032), https://doi.org/10.1029/2009GC002709.