Group B, Poster #180, Fault and Rupture Mechanics (FARM)
Impact of material properties on Bay Area rupture dynamics
Poster Image:

Poster Presentation
2025 SCEC Annual Meeting, Poster #180, SCEC Contribution #14825 VIEW PDF
m on the faults.
We use SeisSol, an open-source, high-performance finite-element tool implementing the Arbitrarily high-order DERivative Discontinuous Galerkin (ADER-DG) scheme, to simulate earthquake rupture and seismic wave propagation. Each simulation is initialized with a static stress field and rupture is nucleated at different locations across multiple runs to assess variability in onset. Material properties, including density, P-wave velocity, S-wave velocity, and P- and S-wave attenuation, are extracted from the USGS 3D seismic velocity model for the San Francisco Bay region and imported via NetCDF grids. Fault failure is governed by a linear slip weakening friction law.
We compare elastically heterogeneous and homogeneous material scenarios, quantifying how realistic velocity values impact rupture arrival on the branched fault system, peak slip rates, and rupture speed. We also investigate the influence of multiple nucleation locations on rupture scenarios. Spatial and temporal patterns of slip, peak slip rate, and rupture velocity along each fault trace are analyzed to isolate the influence of geometry and material heterogeneity on rupture evolution.
SHOW MORE
We use SeisSol, an open-source, high-performance finite-element tool implementing the Arbitrarily high-order DERivative Discontinuous Galerkin (ADER-DG) scheme, to simulate earthquake rupture and seismic wave propagation. Each simulation is initialized with a static stress field and rupture is nucleated at different locations across multiple runs to assess variability in onset. Material properties, including density, P-wave velocity, S-wave velocity, and P- and S-wave attenuation, are extracted from the USGS 3D seismic velocity model for the San Francisco Bay region and imported via NetCDF grids. Fault failure is governed by a linear slip weakening friction law.
We compare elastically heterogeneous and homogeneous material scenarios, quantifying how realistic velocity values impact rupture arrival on the branched fault system, peak slip rates, and rupture speed. We also investigate the influence of multiple nucleation locations on rupture scenarios. Spatial and temporal patterns of slip, peak slip rate, and rupture velocity along each fault trace are analyzed to isolate the influence of geometry and material heterogeneity on rupture evolution.
SHOW MORE