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Hydro-mechanical Earthquake Cycles in a Poro-visco-elasto-plastic Fluid-bearing Fault Structure by Zilio, Luca Dal; Hegyi, Betti; Behr, Whitney; Gerya, Taras is a scholarly article available to read on EtoBox.

What is Hydro-mechanical Earthquake Cycles in a Poro-visco-elasto-plastic Fluid-bearing Fault Structure about?

A major goal in earthquake physics is to derive a constitutive framework for fault slip that captures the dependence of shear strength on fault rheology, sliding velocity, and pore-fluid pressure. In this study, we present H-MEC (Hydro-Mechanical Earthquake Cycles), a newly-developed two-phase flow numerical code - which couples solid rock deformation and pervasive fluid flow - to simulate how crustal stress and fluid pressure evolve during the earthquake cycle on a fluid-bearing fault structure. This unified, continuum-based model, incorporates a staggered finite difference-marker-in-cell (SFD-MIC) method and accounts for full inertial (wave mediated) effects and fluid flow in poro-visco-elasto-plastic compressible medium. Global Picard-iterations and an adaptive time stepping allows the correct resolution of both long- and short-time scales, ranging from years during slow tectonic loading to milliseconds during the propagation of dynamic ruptures. We present a comprehensive in-plane strike-slip setup in which we test analytical poroelastic benchmarks of pore-fluid pressure diffusion from an injection point along a finite fault width. We then investigate how pore-fluid pressure ev

Author

Zilio, Luca Dal; Hegyi, Betti; Behr, Whitney; Gerya, Taras

Published

2022

Language

EN