GNGTS 2013 - Atti del 32° Convegno Nazionale

Fig. 1 – Locations of the per- manent GPS stations used in this work. Circles and trian- gles respectively indicate sci- entific and commercial per- manent stations, given in the legend. The inset shows the 16 IGS stations we have used to align the above regional net- work to the ITRF2005 refer- ence frame. Wagner, T., Fabel, D., Fiebig, M., Häuselmann, P., Sahy, D., Xu, S., Stüwe, K., 2010. Young uplift in the non-glaciated parts of the Eastern Alps. Earth and Planetary Science Letters 295, 159-169. Willingshofer, E., Cloetingh, S., 2003. Present-day lithospheric strength of the Eastern Alps and its relationship to neotectonics. Tectonics 22, 1075, doi:10.1029/2002TC001463. Wölfler, A., Kurz, W., Fritz, H., Stüwe, K., 2011. Lateral extrusion in the Eastern Alps revisited: Refining the model by thermochronological, sedimentary, and seismic data, Tectonics, 30, TC4006, doi:10.1029/2010TC002782 Wortel, M.J.R., Spakman, W., 2000. Subduction and slab detachment in the Mediterranean-Carpathian region. Science 290, 1910-1017. Present-day Vertical kinematic pattern in the Central andNorthern Italy form permanent GPS stations N. Cenni 1,2 , P. Baldi 1 , F. Loddo 3 , G. Casula 3 , M. Bacchetti 1 1 Dipartimento di Fisica ed Astronomia – Università degli Studi di Bologna, Bologna, Italy 2 Dipartimento Scienze Biologiche, Geologiche ed Ambientali – Università degli Studi di Bologna, Bologna, Italy 3 Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy Introduction. The aim of this work is to describe the results of the analysis of observational GPS data of permanent stations located in the Northern Italy and surroundings in order to estimate the present-day vertical kinematic pattern. The high density GPS network distributed on the area can provide a detailed spatial description of the movements. The area considered includes regions with different kinematic style: Alps, Apennines and Po river alluvial basin. The Po val- ley has been affected in the last six- ty years by a strong anthropogenic land subsidence due to groundwater pumping from a shallow well-devel- oped multi-aquifer system and gas production from a number of onshore and offshore gas reservoirs; its verti- cal movements in the last years are well known from repeated precise leveling spanning nearly hundred years and more recently from Din- SAR measurements and GPS per- manent stations observations. The long observation period of several GPS permanent sites can allow us to investigate about actual vertical rates and their possible time variations. 162 GNGTS 2013 S essione 1.2