GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 1.3 GNGTS 2024 The Atenuaton and Scatering Signature of Fluid Reservoirs and Tectonic Interactons in the Central-Southern Apennines (Italy) D. Talone* 1,2 , L. De Siena 2,3 , G. Lavecchia 1,2 , R. de Nardis 1,2 1 Department of Psychological Sciences, Health and Territory, University of the Studies “G. d'Annunzio”, Chiet, Italy 2 CRUST-Interuniversity Center for 3D Seismotectonics with Territorial Applicatons, Chiet, Italy 3 Dipartmento di Fisica e Astronomia (DIFA), Alma Mater Studiorum-Università di Bologna, Bologna, Italy For decades, seismic tomography techniques have imaged the Italian peninsula (Di Stefano and Ciaccio, 2014; Gualteri et al., 2014; Scafdi et al., 2009; Zhao et al., 2016). Both large-scale and very local models have been produced, especially for the Northern and the Southern Apennines. Despite its seismotectonic interest, no seismic crustal image of the Central-Southern Apennines transiton zone is currently available , primarily due to its low rates of seismic actvity (Bagh et al., 2007; Frepoli et al., 2017; Romano et al., 2013; Trionfera et al., 2019). Nowadays, the improvements in seismic detecton infrastructures’ sensibility and coverage allow the enrichment of seismic databases and the possibility of reliable geophysical imaging in these poor conditons. We applied the MuRAT package (De Siena et al., 2014; De Siena et al., 2014; Reiss et al., 2022) to perform 3D atenuaton and scatering tomography, using seismic amplitudes from earthquake recordings to measure and model the total and scatering energy lost by P- and S- waves while propagatng through space. The technique has been applied to volcanic contexts and tectonic frameworks showing high sensitvity to fuid-driven processes and strain accumulaton (Amoroso et al., 2017; Di Martno et al., 2022; King et al., 2023, 2022; Sketsiou et al., 2021; Tisato and Quintal, 2014). Fracture networks and their potental fuid storage are thus ideal targets for these tomographic studies. By analyzing the peak delay of seismic envelopes and the coda- normalized energy loss, we interpreted the novel 3D models as images of the principal tectonic structures and fuid pathways.