GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione 1.1 179 anticline-trend of LGM and Early Holocene (historical) deposits, middle to high angle reverse faults with clasts-rotation along the shear zones involving the historical sediments and extrados cleavage, indicated that the Maniago thrust is not only an active fault but also a capable one. Moreover the very recent age of the deformed stratigraphic units (1460 AD), compared with the DBMI-15 Catalogue allowed us to consider the 1776.07.10 earthquake (Imax=8-9), as the last seismic event linked to the Maniago thrust tectonic activity. These new data cast new light on the seismic hazard assessment in the western Friuli. References Locati M., Camassi R., Rovida A., Ercolani E., Bernardini F., Castelli V., Caracciolo C.H., Tertulliani A., Rossi A., Azzaro R., D’Amico S., Conte S., Rocchetti E.; 2016: DBMI15, the 2015 version of the Italian Macroseismic Database. Istituto Nazionale di Geofisica e Vulcanologia. doi :http://doi.org/10.6092/INGV.IT-DBMI15 Monegato G. and Poli M.E.; 2015: Tectonic and climatic inferences from the terrace staircase in the Meduna valley, eastern Southern Alps, NE Italy . Quat. Res., 83 , 229–242. Vrabec M. and Fodor L.; 2006: Late Cenozoic tectonics of Slovenia: structural styles at the Northeastern corner of the Adriatic microplate. In: Pinter, N., Grenerczy, G., Weber, J., Stein, S., Medak, D. (Eds.), The Adria Microplate: GPS Geodesy, Tectonics and Hazards, 151-168. Nato Science Series: IV: Earth and Environmental Sciences, 61, Springer. Caporali A., Neubauer F., Ostini L., Stangl G., Zuliani D.; 2013: Modeling surface GPS velocities in the Southern and Eastern Alps by finite dislocations at crustal depths. Tectonophysics 590 (2013) 136–150. The FASTMIT project (FAglie Sismogeniche e Tsunamigeniche nei Mari ITaliani) G. Rossi 1 , R. Basili 2 and FASTMIT Working Group 1 Istituto Nazionale di Oceanografia e di Geofisica Sperimentale – OGS, Centro di Ricerche Sismologiche, Trieste, Italy 2 Istituto Nazionale di Geofisica e Vulcanologia – INGV, Roma, Italy Italy and its surrounding Seas straddle the active margin between the European and Nubian plates, and together are one of the most seismically active areas of the Mediterranean region. Despite the quite good knowledge about the earthquake-induced hazards in the Italian landmass, large uncertainties and knowledge gaps exist in the marine areas. Recent researches in marine geophysics and geology conducted independently by CNR, INGV, OGS, and by several other scientists from Italian Universities, as well as International research organizations in theAdriatic Sea, Ionian Sea, Tyrrhenian Sea, and Sicily Channel testify the presence of active structures that are still poorly known and may host a significant seismogenic and tsunamigenic potential. FASTMIT (FAglie Sismogeniche e Tsunamigeniche nei Mari ITaliani) is an OGS-INGV project funded by the Ministry of Education, University and Research (MIUR) within the National funding program “Premiale 2014” with a planned duration of two years. FASTMIT aims to improve the knowledge and rationalize the available information on the tectonic structures in Italy’s adjacent Seas, with a particular focus on four study areas (the Adriatic Sea, the Gulf of Taranto, the Sicilian Channel, and the southern Tyrrhenian Sea). The expected results will significantly improve the basic input for future seismic and tsunami hazard estimates at three distinct levels: • for probabilistic seismic hazard and tsunami hazard assessment at national scale developed for building codes, land-use planning, and other regulatory purposes; • for assessments of the hazard and risk characterizing the Italian coastal areas - particularly critical for the high population density and the concentration of facilities classified as “RIR” (Rischio di Incidente Rilevante; Italian for “at risk of significant accident”) in the recent maps edited by ISPRA;