VISCO1D Software


  • A set of Fortran programs written by Fred Pollitz which calculates the response of a spherically stratified elastic-viscoelastic medium to the stresses generated by an earthquake occurring in one of the elastic layers. The response is described in a spherical earth geometry in terms of a spherical harmonic expansion of spheroidal and toroidal motion components, each component representing one "mode" of relaxation with its own characteristic decay time and spatial deformation pattern. It is highly flexible and allows the determination of time-dependent postseismic deformation fields (three components of displacement and six independent components of strain) at any depth level. It handles shear dislocations on a specified fault plane, or extension across a specified fault plane.