GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 2.1 GNGTS 2023 A tool for the interoperability between DISS and ITHACA databases of Italy's seismogenic sources and active and capable faults: better input for modern SHA P. Burrato 1 , L. Bonadeo 2 , A.M. Blumetti 3 , V. Comerci 3 , M.P. Congi 3 , P. Di Manna 3 , L. Guerrieri 3 , R. Ventura 3 , G. Tarabusi 1 , G. Valensise 1 , DISS Working Group 1 , D. Di Bucci 4 1 Istituto Nazionale di Geofisica e Vulcanologia, Italy 2 Via dell'Acquedotto 30, 12051 Alba (CN), Italy 3 Istituto Superiore per la Protezione e la Ricerca Ambientale, Italy 4 Dipartimento della Protezione Civile, Italy Introduction Ground shaking hazard assessment requires the availability of an orderly and fully georeferenced set of Composite Seismogenic Sources (CSS), such as those provided by the DISS database, created and maintained by INGV (Database of Individual Seismogenic Sources; Basili et al. 2008; DISS Working Group, 2021; available at https://diss.ingv.it/ ). Along with its companion compilations developed at European scale (https://www.seismofaults.eu) , DISS contributes data to the European Facilities for Earthquake Hazard and Risk (EFEHR) consortium (http://www.efehr.org/start/) . These databases provide the 3D geometry and the location of the surface projection of the seismogenic sources, but do not and cannot provide details on their surface expression, if any (many seismogenic sources are positively blind and their surface expression is either very elusive or simply absent). In contrast, surface breaking hazard assessment requires the availability of an orderly and fully georeferenced set of Active and Capable Faults (ACF), such as those provided by the ITHACA database, created and maintained by ISPRA (ITaly HAzard from CApable faults; Ithaca Working Group, 2019; http://sgi2.isprambiente.it/ithacaweb/default.aspx#1 ; web viewer: http://sgi2.isprambiente.it/ithacaweb/viewer/ ). ITHACA is part of a large set of geological information maintained by the Servizio Geologico d'Italia. This database provides the 2D location of a number of faults that are supposed to be active and potentially capable, but does not and cannot provide the geometry and characteristic of the underlying seismogenic sources. Hence, the DISS and ITHACA are two completely independent, well-established databases: they describe different tectonic parameters and interactions of the earthquake with both the geology and landscape and the built environment.