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Steven C. Cohen
Viscoelastic postseismic rebound from strike-slip earthquakes in regions of oblique plate convergence
Bulletin of the Seismological Society of America (October 2000), 90(5):1318-1322
Abstract: Index Terms/Descriptors: GeoRef, Copyright 2004, American Geological Institute.
According to the slip-partitioning concept, the trench parallel component of relative plate motion in regions of oblique convergence is accommodated by strike-slip faulting in the overriding continental lithosphere. The pattern of postseismic surface deformation due to viscoelastic flow in the lower crust and asthenosphere following a major earthquake on such a fault is modified from that predicted from the conventional elastic layer over viscoelastic half-space model by the presence of the subducting slab. The predicted effects, such as a partial suppression of the postseismic velocities by 1 cm/yr or more immediately following a moderate to great earthquake, are potentially detectable using contemporary geodetic techniques.
asthenosphere; continental lithosphere; crust; earthquakes; elasticity; equations; faults; geodesy; half-space; lithosphere; lower crust; magnitude; oblique orientation; plate convergence; plate tectonics; seismicity; stress; strike-slip faults; subduction; upper crust; viscoelasticity; viscosity