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. This study presents and discusses horizontal and verticalgeodetic velocities for a low strain rate region of the south Alpine thrustfront in northeastern Italy obtained by integrating GPS, interferometric synthetic aperture radar (InSAR) and leveling data. The area is characterized by the presence of subparallel, south-verging thrusts whose seismogenic potential is still poorly known. Horizontal GPS velocities show that this sector of the eastern Southern Alpsis undergoing ∼1 mm a−1 of NW–SE shortening associated with theAdria–Eurasia plate convergence, but the horizontal GPS velocity gradientacross the mountain front provides limited constraints on the geometry andslip rate of the several subparallel thrusts. In terms of verticalvelocities, the three geodetic methods provide consistent results showing apositive velocity gradient, of ∼ 1.5 mm a−1, across the mountainfront, which can hardly be explained solely by isostatic processes. Wedeveloped an interseismic dislocation model whose geometry is constrainedby available subsurface geological reconstructions and instrumentalseismicity. While a fraction of the measured uplift can be attributed toglacial and erosional isostatic processes, our results suggest thatinterseismic strain accumulation at the Montello and theBassano–Valdobbiadene thrusts it significantly contributing to the measureduplift. The seismogenic potential of the Montello thrust turns out to besmaller than that of the Bassano–Valdobbiadene fault, whose estimatedparameters (locking depth equals 9.1 km and slip rate equals 2.1 mm a−1) indicate a structurecapable of potentially generating a Mw&gt;6.5 earthquake. Theseresults demonstrate the importance of precise vertical ground velocity datafor modeling interseismic strain accumulation in slowly deforming regionswhere seismological and geomorphological evidence of active tectonicsis often scarce or not conclusive.

New insights into active tectonics and seismogenic potential of the Italian Southern Alps from vertical geodetic velocities