A 4-D Earthquake Cycle Model with Lateral Variations in Shear Modulus

David T. Sandwell, & Bridget R. Smith-Konter

Submitted August 11, 2017, SCEC Contribution #7507, 2017 SCEC Annual Meeting Poster #089

We have developed a semi-analytic approach (and computational code) for rapidly calculating 3D time-dependent deformation and stress caused by screw dislocations imbedded within an elastic layer overlying a Maxwell viscoelastic half space. The maxwell model is developed in the Fourier domain to exploit the computational advantages of the convolution theorem, hence substantially reducing the computational burden associated with an arbitrarily complex distribution of force couples necessary for fault modeling. The new aspect of this development is the ability to model lateral variations in shear modulus. Ten benchmark examples are provided for testing and verification of the algorithms and code. One final example simulates interseismic deformation along the San Andreas Fault System where lateral variations in shear modulus are included to simulate lateral variations in lithospheric structure.

Key Words
earthquake cycle, community rheology model

Citation
Sandwell, D. T., & Smith-Konter, B. R. (2017, 08). A 4-D Earthquake Cycle Model with Lateral Variations in Shear Modulus. Poster Presentation at 2017 SCEC Annual Meeting.


Related Projects & Working Groups
Tectonic Geodesy