GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.1 GNGTS 2023 values into classes of 0.1 g range. We used the EILs location to sample the PGA value and derive a power law relationship showing an increasing landslide density with increasing acceleration. As a final step, these empirical relationships were used to relate each landslide belonging to the Italian national inventory (IFFI) to individual segments of known seismogenic sources located in the Italian territory or in nearby countries within a maximum distance corresponding to the 95 th percentile distance calculated from the expected magnitude of the seismogenic source (Fig. 2). We used the composite seismogenic sources of the DISS database version 3.3.0 (DISS Working Group, 2021) hypothesizing that they may trigger the EILs activation during future earthquakes and, using a floating hypocenter approach, i.e. shifting the hypocenters along the seismogenic sources with 4 km fixed steps, built preliminary EILs scenarios for each potential hypocenter location. Acknowledgements This research was developed in the framework of the Project “ Approccio integrato e multi-scala per la definizione della pericolosità da frana sismo-indotta nel territorio italiano ” granted to the Istituto Nazionale di Geofisica e Vulcanologia and to the Dipartimento di Ingegneria e Geologia of the Università degli Studi “G. d’Annunzio” di Chieti-Pescara, by the Italian Ministero dell'Ambiente e della Sicurezza Energetica (former Ministero dell’Ambiente e della Tutela del Territorio e del Mare) within the 2018 competitive public call for financing research projects aimed at the prediction and prevention of geological risks. References Danciu L., Nandan S., Reyes C., Basili R., Weatherill G., Beauval C., Rovida A., Vilanova S., Sesetyan K., Bard P-Y., Cotton F., Wiemer S., Giardini D.; 2021: The 2020 update of the European Seismic Hazard Model: Model Overview . EFEHR Technical Report 001, v1.0.0, https://doi.org/10.12686/a15. DISS Working Group; 2021: Database of Individual Seismogenic Sources (DISS), Version 3.3.0: A compilation of potential sources for earthquakes larger than M 5.5 in Italy and surrounding areas . Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/diss3.3.0. Fan X., Scaringi G., Korup O., West A.J., van Westen C.J., Tanyas H., et al.; 2019: Earthquake‐induced chains of geologic hazards: Patterns, mechanisms, and impacts . Reviews of Geophysics, 57, 421–503. https://doi.org/10.1029/2018RG000626. Guidoboni E., Ferrari G., Mariotti D., Comastri A., Tarabusi G., Sgattoni G., Valensise G.; 2018: CFTI5Med, Catalogo dei Forti Terremoti in Italia (461 a.C.-1997) e nell’area Mediterranea (760 a.C.-1500) . Istituto Nazionale di Geofisica e Vulcanologia (INGV). doi: https://doi.org/10.6092/ingv.it-cfti5. Guidoboni E., Ferrari G., Tarabusi G., Sgattoni G., Comastri A., Mariotti D., Ciuccarelli C., Bianchi M.G., Valensise G.; 2019: CFTI5Med, the new release of the Catalogue of Strong Earthquakes in