GNGTS 2019 - Atti del 38° Convegno Nazionale

270 GNGTS 2019 S essione 2.1 Mascandola C., Massa M., Barani S., Lovati S. and Santulin M.; 2017: Long-period amplification in deep alluvial basins and consequences for site-specific probabilistic seismic hazard analysis: an example from the Po Plain (Northern Italy) . Bull. Seismol. Soc. Am., 107 , 770-786. Pergalani F., Pagliaroli A., Bourdeau C., Compagnoni M., Lenti L., Lualdi M., Madiai C., Martino S., Razzano R., Varone C. and Verrubbi V.; 2019: Seismic microzoning map: approaches, results and applications after the 2016- 2017 Central Italy seismic sequence . Bull. Earthq. Eng., doi:10.1007/s10518-019-00640-1. Priolo E., Pacor F., Spallarossa D., Milana G., Laurenzano G., Romano M.A., Felicetta C., Hailemikael S., Cara F., Di Giulio G., Ferretti G., Barnaba C., Lanzano G., Luzi L., D’Amico M., Puglia R., Scafidi D., Barani S., De Ferrari R. and Cultrera G.; 2019: Seismological analyses of the seismic microzonation of 138 municipalities damaged by the 2016-2017 seismic sequence in Central Italy . Bull. Earthq. Eng., doi:10.1007/s10518-019-00652-x. Rodriguez-Marek A., Rathje E.M., Bommer J.J., Scherbaum F. and Stafford P.J.; 2014: Application of single-station sigma and site-response characterization in a probabilistic seismic-hazard analysis for a new nuclear site . Bull. Seismol. Soc. Am., 104 , 1601-1619. Santulin M., Tamaro A., Rebez A., Slejko D., Sani F., Martelli L., Bonini M., Corti G., Poli M.E., Zanferrari A., Marchesini A., Busetti M., Dal Cin M., Spallarossa D., Barani S., Scafidi D., Barreca G. and Monaco C.; 2017: Seismogenic zonation as a branch of the logic tree for the new Italian seismic hazard map – MPS16: a preliminary outline . Boll. Geofis. Teor. Appl., 58 , 313-342. SMWorking Group; 2015: Guidelines for Seismic Microzonation . Conference of Regions and Autonomous Provinces of Italy, Civil Protection Department, Rome (Original Italian Edition: Gruppo di lavoro MS, Indirizzi e criteri per la microzonazione sismica, Conferenza delle Regioni e delle Province autonome – Dipartimento della protezione civile, Roma, 2008, 3 vol. e Dvd). Von Thun J.L., Rochim L.H., Scott G.A. and Wilson J.A.; 1988: Earthquake ground motions for design and analysis of dams . In: Earthquake Engineering and Soil Dynamics II – Recent Advance in Ground-Motion Evaluation, Geotechnical Special Publication 20, ASCEE, New York, pp. 463-481. LOCAL TSUNAMI SCENARIOS IN THE SOUTH-EASTERN COAST OF SICILY M.S. Barbano, C. Pirrotta Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Catania, Italy Introduction. During the last 2000 years, the 250 km long Ionian coast of Sicily has been affected by at least 11 historical tsunamis (e.g. Gerardi et al. , 2008) and geological evidence of several paleo-inundations has also been found (De Martini et al. , 2012 and references therein). Usually, to calculate the tsunami flooded area numerical models are used to simulate generation, propagation and inundation processes. Two alternative but complementary approaches (e.g. Tonini et al. , 2011; Lorito et al. , 2015) are applied: the Probabilistic Tsunami Hazard Assessment (PTHA) and the Deterministic Tsunami Hazard assessment (or Scenario Based, SBTHA). PTHA is achieved obtaining seismic return periods for potential tsunamigenic earthquakes including random uncertainties on the fault and sea level parameters. SBTHA is obtained by means of worst-case scenarios, simulating the maximum potential tsunamigenic sources and combining the results of a number of worst-case scenarios (e.g. Tonini et al. , 2011). Since in our study area the seismogenic sources are not well known, we used a simplified SBTHA, which does not consider generation but only wave propagation and inundation, starting from historical observed run-up and validating the numerical models by using historical and/or geological observed inundations. Historical and geological tsunami data, along with equations of the wave attenuation on the coast, based on peak period, run-up and sea bottom slope and coastal topography, are used to define local flooding scenarios along a stretch of south-eastern Sicilian coast from Calabernardo to Capo Passero (Fig. 1). Results obtained by numerical approaches are used to delineate local tsunami inundation scenarios.