GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 1.3 GNGTS 2024 PRIN 2020 NASA4SHA Project: A Combined Regional Velocity Field of Northern Italy A. Galvani1, M. Albano1, C. Braitenberg2, F. Brighent3, R. Caputo4, F. Carnemolla3, D. Cheloni1, G. De Guidi3, R. Devot1, A. Magrin5, A. Pellegrinelli4, G. Pietrantonio1, G. Rossi5, S. Stramondo1, L. Tunini5, D. Zuliani5 1 Isttuto Nazionale di Geofsica e Vulcanologia, Rome, Italy 2 Università degli Studi di Trieste, Trieste, Italy 3 Università degli Studi di Catania, Catania, Italy 4 Università degli Studi di Ferrara, Ferrara Italy 5 Isttuto Nazionale di Oceanografa e di Geofsica Sperimentale, Trieste, Italy The actvity presented in this note is part of the PRIN 2020 NASA4SHA Project (Fault segmentaton and seismotectonics of actve thrust systems: the Northern Apennines and Southrn Alps laboratorie for new Seismic Hazard Assessments in northern Italy). The project's objectve is to defne, through a multdisciplinary approach including geological, geophysical, seismological, paleoseismological, and geodetc methods at various scales (regional and local), the geometry and kinematcs of the main compressive systems in the central – estern Southern Alps and Northern Apennines (Fig. 1). Geodetc methods make it possible to reconstruct the ongoing deformaton rate of the Earth's surface at regional and local scales (with high-density networks). This informaton, combined with the 3D model of tectonic structures present in the investgated region, can indicate areas/volumes where the tectonic actvity and the deformaton are either more or less intense, enabling a focus on fault zones where the stress is increasingly accumulated. We analyzed data from contnuous GNSS (Global Navigaton Satellite Systems) statons covering the entre study area, belonging to the RING (Rete Integrata Nazionale GNSS) and FReDNet (Friuli Regional Deformaton Network) networks, managed by INGV (Isttuto Nazionale di Geofsica e Vulcanologia) and OGS (Isttuto Nazionale di Oceanografa e di Geofsica Sperimentale - OGS) respectvely, together with data from other permanent networks, managed by various insttutons. In additon, we have resurveyed some vertces of the IGM95 geodetc network, focusing on local transects orthogonal to the main compressive structures, and we have analyzed the new discontnuous GNSS observatons together with the previous ones performed in the past by IGM (Isttuto Geografco Militare) on the same vertces. Here, we present the regional velocity feld (Fig. 2) of the GNSS permanent statons (discontnuous sites will be included in a second release), obtained as a result of the combinaton of two velocity