Abstract
Abstract. We present a finite-element model of post-seismic solid
Earth deformation built in the software package Abaqus (version 2018). The model
is global and spherical, includes self-gravitation and is built for the
purpose of calculating post-seismic deformation in the far field
(>∼300 km) of major earthquakes. An earthquake is
simulated by prescribing slip on a fault plane in the mesh and the model
relaxes under the resulting change in stress. Both linear Maxwell and
biviscous (Burgers) rheological models have been implemented and the model
can be easily adapted to include different rheological models and lateral
variations in Earth structure, a particular advantage over existing models.
We benchmark the model against an analytical coseismic solution and an
existing open-source post-seismic model code, demonstrating good agreement
for all fault geometries tested. Due to the inclusion of self-gravity, the
model has the potential for predicting deformation in response to multiple
sources of stress change, for example, changing ice thickness in
tectonically active regions.
Funder
Australian Research Council
Cited by
6 articles.
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