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http://hdl.handle.net/2122/15673
Authors: | Serpelloni, Enrico* Cavaliere, Adriano* Martelli, Leonardo* Pintori, Francesco* Anderlini, Letizia* Borghi, Alessandra* Randazzo, Daniele* Bruni, Sergio* Devoti, Roberto* Perfetti, Paolo* Cacciaguerra, Stefano* |
Title: | Surface Velocities and Strain-Rates in the Euro-Mediterranean Region From Massive GPS Data Processing | Journal: | Frontiers in Earth Science | Series/Report no.: | /10 (2022) | Publisher: | Frontiers Media S.A. | Issue Date: | 1-Jun-2022 | DOI: | 10.3389/feart.2022.907897 | URL: | https://www.frontiersin.org/articles/10.3389/feart.2022.907897/full | Keywords: | GNSS data processing time series analysis horizontal strain rates vertical ground velocities Euro- Mediterranean region |
Abstract: | In this work we present and discuss new geodetic velocity and strain-rate fields for the Euro-Mediterranean region obtained from the analysis of continuous GNSS stations. We describe the procedures and methods adopted to analyze raw GPS observations from >4000 stations operating in the Euro-Mediterranean, Eurasian and African regions. The goal of this massive analysis is the monitoring of Earth’s crust deformation in response to tectonic processes, including plate- and micro-plate kinematics, geodynamics, active tectonics, earthquake-cycle, but also the study of a wide range of geophysical processes, natural and anthropogenic subsidence, sea-level changes, and hydrology. We describe the computational infrastructure, the methods and procedures adopted to obtain a threedimensional GPS velocity field, which is used to obtain spatial velocity gradients and horizontal strain-rates. We then focus on the Euro-Mediterranean region, where we discuss the horizontal and vertical velocities, and spatial velocity gradients, obtained from stations that have time-series lengths longer than 6 and 7 years, which are found to be the minimum spans to provide stable and reliable velocity estimates in the horizontal and vertical components, respectively. We compute the horizontal strain-rate field and discuss deformation patterns and kinematics along the major seismogenic belts of the Nubia-Eurasia plate boundary zone in the Mediterranean region. The distribution and density of continuous GNSS stations in our geodetic solution allow us to estimate the strain-rate field at a spatial scale of ~27 km over a large part of southern Europe, with the exclusion of the Dinaric mountains and Balkans. |
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