Ground Displacements Estimation through GNSS and Geometric Leveling: A Geological Interpretation of the 2016–2017 Seismic Sequence in Central Italy

Between August 2016 and January 2017, a very energetic seismic sequence induced substantial horizontal vertical ground displacements in the Central Italian Apennines. After this event, Military Geographical Institute (IGM), owner manager of geodetic networks, executed several topographic surveys earthquake area order to update coordinates vertices belonging IGM95 network. The measurements began areas where most significant deformation occurred: localities Amatrice Accumoli, Rieti Province, covering Norcia Castelluccio, Province Perugia, all way Visso (Province Macerata). activities described paper focused on updated measurement network points through GNSS restatement extensive parts high precision geometric lines that were levelled until reaching stable zones. This unprecedented amount data was used for new geological interpretation sequence, which confirms some previous hypotheses scientific community. In analyzed territory, latest estimate position has allowed an accurate determination east north altitude components displacement by comparison with coordinates. results confirm seismicity normal faults system activity. Still, they also indicate possible influence regional thrust conditioned propagation area. obtained maps are coherent other works rupture driven documented geotectonic structure.