GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 1.1 43 8) We calculated the principal deformation axes from the FSP data and/or from the plane attitude and rake. The FSPs in the QUIN database refer to meso- and major-scale fault planes surveyed in Structural Sites (SS) located along or near to the Host Fault traces. We did not report fault planes without lineation data as they are unsuitable for kinematic analysis. Making available a regional compilation of detailed fault traces and structural data is fundamental to constraining the geometry and kinematics of the intra-Apennine potentially seismogenic faults, also performing detailed studies on kinematic partitioning and rupture segmentation, both with classical methodologies and with new technologies. Our data help to clarify and implement the contemporary geometric and kinematic deformation pattern of Central Italy that appears scattered and incomplete whenever exclusively derived from earthquake data. Each Structural Site with a sufficient and kinematically homogeneous fault population, represented as pseudo-focal mechanism, can be compared with seismological focal mechanisms, and used for formal stress field inversion. QUIN is useful to refine and locally extend the surface boundary of the Italian extensional seismogenic province, with relevance for hazard assessment evaluation, especially in areas that have not yet released earthquakes since historical times. An extension of the database to southern peninsular Italy is underway within the frame of the MUSE-4D PRIN2017 project (Lavecchia PI). References Andrenacci C., Bello S., de Nardis R., Lavecchia G.; 2021: Fault-Striation Pair Analysis (F-SPA) Tool. Zenodo. https:// doi.org/10.5281/zenodo.5910783. Lavecchia G., Bello S., Andrenacci C., Cirillo D., Ferrarini F., Vicentini N., de Nardis R., Brozzetti F.; 2021: Host Faults Database of central Italy. Zenodo. https://doi.org/10.5281/zenodo.6412501. Lavecchia G., Bello S., Andrenacci C., Cirillo D., Ferrarini F., Vicentini N., de Nardis R., G. Roberts, Brozzetti F.; 2022: QUaternary fault strain INdicators database - QUIN 1.0 -first release from the Apennines of central Italy. Scientific Data, accepted in May 2022.