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The volume of the hangingwall prism affected by coseismic slip amounts to 5500–6700 km, (2) fast rupture velocity (3.1 km/s), and (3) pronounced heterogeneities of the slip distribution. According to the seismological data, the entire sequence activated a SW-dipping normal fault system, striking about N150°–160° and dipping ~45°–55°, locally with listric shape.At depth, the slip is characterized by two main patches, the southern one being smaller and characterized by maximum slip of ~100 cm, and the northern one with an average slip of ~60 cm. Possible reactivation and inversion of an inherited W-dipping thrust has been advocated. Bove; a maximum total vertical displacement of ~1.2 m was reconstructed along the Mt. The antithetic conjugate NE-dipping normal fault is not always illuminated by seismicity, and coseismic deformation of the graben or half graben continuously varies moving along strike (Fig.The advent of GPS and Differential SAR Interferometry (DIn SAR) data has proven to be essential to carry out a step forward in analysing earthquakes and their coseismic effects on the ground.Along dipping faults, the recorded displacement is asymmetric because the hangingwall systematically moves more than the footwall.This unbalance regularly occurs in normal fault-related earthquakes and can be inferred as a significant contribution to coseismic strain accomodated by a stress-drop driven collapse of precursory dilatancy.
Regardless the tectonic setting, any motion along fault planes determines the shear between two volumes generating the double-couple mechanism predicts symmetric displacement on both fault walls, consistent with observations from earthquakes occurring along strike-slip faults.
Where exposed, the fault juxtaposes Early-Middle Miocene marly limestones (Marne con Cerrogna Fm) in the footwall with Messinian siliciclastic deposits (Laga Fm) in the hangingwall. Vettore fault system is ~18 km long and consists of a series of SW-dipping (34°–75°) extensional faults, cutting through the flanks and the foothills of Mt. 2), describing a prismatic volume with clouds of earthquakes along the main fault planes (Figs 3 and 4). The mechanisms show N150°–160° trending normal faulting.
The area affected by the sequence is elongated NW-SE, about 70–90 km long and 10–15 km wide.
Is this phenomenology consistent with the coseismic horizontal elastic rebound or more suitable with the hangingwall gravitational collapse?
We address the question whether the rock volume dilated in the brittle layer during the interseismic preparatory period was only elastically stretched ≥ 5 events (Fig. In section, the seismicity illuminates a triangular volume with scattered clouds along a SW-dipping normal fault system dipping 45°–55° and conjugated NE-dipping faults.