GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.2 GNGTS 2023 with data from 2D velocity models (Scarascia et al., 1994; Chironi et al., 2000; Nicolich et al., 2000; Cassinis et al., 2005; Dellong et al., 2018), gravimetric profiles (Chironi et al., 2000; Dellong et al., 2018) and seismic profiles interpreted (Finetti, 2005; Catalano et al., 2013; Tugend et al., 2019; Sulli et al., 2021). The location of these data is shown in Figure 1. These data were interpolated using the Delaunay triangulation method using the three-dimensional modelling software "Move 2017". In order to optimize the geometry of the Ionian slab, the hypocenters of the seismic events extrapolated from the ISIDe database (2016) were used. In particular, the seismic events of the last 17 years (2005-2022) with a depth greater than 40 km and M>2 were collected. Fig. 1 - Location of hypocenters of the seismic events (from 2005 to 2022, M>4, depth >40 km), velocity models, gravimetric and seismic profiles. RESULTS The topography of the Moho in the Central Mediterranean presents a strong lateral variation (Fig. 2). In the Sicily Channel the depth of the Moho is between 25 and 28 km deep with a mantle uplift up to 17 km at the graben of Pantelleria and Linosa. Below the Calabrian Arc the depths are greater and reach 40 km. In the southern Tyrrhenian Sea depths are observed between 20 and 25 km that decrease at the basins of Vavilov and Marsili where the Moho reaches a depth of 10 km.