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The axial part of the belt rather pertains to the backarc undergoing extension at 3–5 mm/yr rates due to the ‘eastward’ retreat of the slab hinge. Gorzano Fault showed that medium-high magnitude earthquakes (M.
The seismic sequence activated progressively a crustal volume 70–90 km long, 10–15 km wide and about 8–10 km deep. The whole normal fault system, confined within the first 10 km of the upper crust, is detached and floored by a shallow, gently 10°–15° easterly-dipping and 2–3 km-thick layer in which small events plus a series of large extensional aftershocks (≈M.
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 distribution of the seismicity demonstrates the shape of the involved upper crustal volume rather than a simple planar fault.
until November 2016 in the area affected by the seismic sequence.
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.
Earthquakes produce dissipation of energy trapped by the pressure gradient forming between two walls moving at different velocity during the interseismic period.
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.
Ground deformation maps show that the displacement (either subsidence or uplift) of hangingwall blocks is larger than that of footwall blocks.
In fact, normal fault-related earthquakes are characterized by larger coseismic hangingwall subsidence than correlated footwall uplift.
The fault dip is the vector sum of the vertical and horizontal components (Fig.Tags: Adult Dating, affair dating, sex dating