Micromechanical model: Effect of Damage on erathquake rupture dynamic | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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Research Departments

Lithosphere tectonics and mechanics

  Micromechanical model: Effect of Damage on erathquake rupture dynamic

In the last past decade, a range of novel observations in earthquake physics have highlighted transient changes of inherent properties of the medium associated with dynamic earthquake rupture (e.g., wave speed, hydraulic properties) followed by their gradual recovery. They hint a full non-linear hydro-mechanical coupling between dynamic earthquake ruptures and the surrounding off-fault medium and force us to revisit traditional models of earthquakes as slip on a frictional plane in a linear elastic media.

 

This project aims to investigate the interplay between earthquake ruptures dynamic, off-fault damage and fault network connectivity to better assess seismic hazard.  We use numerical modeling technique (Spectral Element Method) to model dynamic rupture propagation along geometrically complex fault system hosted in an anelastic medium (Viscoplastic and Dynamic Damage). The modeling work will be confronted to seismic and geodetic observations recorded on carefully mapped faults systems.