High-frequency simulations: Verification and validation of the M5.1 La Habra, CA, earthquake

Ricardo Taborda, Kim B. Olsen, Robert W. Graves, Fabio Silva, Naeem Khoshnevis, William H. Savran, Daniel Roten, Zheqiang Shi, Christine A. Goulet, Jacobo Bielak, Philip J. Maechling, Yifeng Cui, & Thomas H. Jordan

Submitted June 25, 2018, SCEC Contribution #7990

The Southern California Earthquake Center (SCEC) High-F project seeks to advance physics-based, deterministic earthquake simulation with the long-term objective of improving ground motion prediction and seismic hazard models. An important aspect of this involves the verification and validation of models, simulation methods, and results. The present study describes the concerted efforts of three simulation groups to verify and validate simulations aimed to reproduce the ground motions from the 2014 M 5.1 La Habra, California, earthquake in the greater Los Angeles region. The simulations are done using three parallel, high-performance computing codes implementing the finite difference and finite element methods. The numerical models are tailored to satisfy a maximum frequency of 5 Hz and a minimum shear wave velocity of 500 m/s. The comparisons between the codes exhibit very good agreement. Ongoing efforts to achieve comparable agreement with data from over 300 strong motion station recordings are underway. Simulations have been carried out on NCSA Blue Waters and on OLCF Titan.

Citation
Taborda, R., Olsen, K. B., Graves, R. W., Silva, F., Khoshnevis, N., Savran, W. H., Roten, D., Shi, Z., Goulet, C. A., Bielak, J., Maechling, P. J., Cui, Y., & Jordan, T. H. (2018, 06). High-frequency simulations: Verification and validation of the M5.1 La Habra, CA, earthquake. Oral Presentation at 11th National Conference in Earthquake Engineering. https://11ncee.org/images/program/papers/11NCEE-001869.pdf

Related Projects & Working Groups
SEISM2, High-F