GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.1 GNGTS 2023 information from exploration wells are used to build a detailed nonplanar 3D geometric and kinematic fault model of the structures responsible for the sequence and to test its fits with the previously built regional model. Preliminary observations highlight a synchronous activity of the upper crust segment activated by the sequence with that of surrounding multi-depth fault structures, and Coulomb stress scenarios are built for analyzing such an aspect. Figure 1. Quaternary and potentially seismogenic extensional and contractional structures and tectonic domains in eastern Central Italy. Historical and instrumental earthquakes from Parametric Catalogue of Italian Earthquakes, CPTI15 v4 (Rovida et al., 2020), and the Italian Seismological Instrumental and parametric Database ISIDe (ISIDe Working group, 2007) are also reported. The thick red lines represent the Adriatic Basal Thrust, and its major splay (Near Coast Thrust, NCT); the thin red lines are the minor splays of ABT. The yellow stars are the major events that occurred in instrumental time. References Boncio P. and Bracone V; 2009: Active stress from earthquake focal mechanisms along the Padan–Adriatic side of the Northern Apennines (Italy), with considerations on stress magnitudes and pore-fluid pressures . Tectonophysics 476, 180-194, doi:10.1016/j.tecto.2008.09.018. Cattaneo M., Monachesi G., Frapiccini M., Calamita C., Pantaleo D., Carluccio I., Ladina C. and Marzorati S.; 2019: ReSIICOeqs. Database of the Central Eastern Italy Seismometric Network: