Post-seismic stress relaxation with a linear transient rheology

Valentina Cannelli, Daniele Melini, Antonio Piersanti

Abstract


We performed an analysis of post-seismic stress relaxation, taking into account generalized linear rheologies. We compared the stress field (and its derived functions) obtained with a classical Maxwell rheology with that obtained with a transient Burgers body. From a set of synthetic case studies, we have revealed quantitative and qualitative differences both in relaxation times and in local stress values when a transient rheology is introduced. As a practical application, we modeled the time evolution of the Coulomb failure function following the 2009 L'Aquila earthquake, and we show that a transient rheology can lead to non-monotonic time dependence.

Keywords


Transient rheology, Geodynamics, Stress tensor, Coulomb failure function, Post-seismic relaxation.

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References


DOI: https://doi.org/10.4401/ag-4642

Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X