Modeling site response effects in sedimentary basins

Jonathan P. Stewart, Chukwuebuka Nweke, Scott J. Brandenberg, Christine A. Goulet, & Robert W. Graves

Submitted July 24, 2020, SCEC Contribution #10206, 2020 SCEC Annual Meeting Talk on TBD

We investigate the benefits of regionalizing basin response in ergodic ground motion models. Using southern California data, we consider: (1) how should basin and non-basin site conditions be classified?; (2) how does mean site response and its variability differ for basins compared to non-basin locations?; and (3) what are the variations in basin response between different basin structures, and how can this be parameterized for predicting ground motion intensity measures?

We present results of research targeted towards answering these questions using a combination of earthquake ground motion data analysis and targeted, physics-based simulations. The results show distinct levels of site response in sedimentary structures having different geometries and geologic origins.

Key Words
Site response, basin effects, ground motion modelling

Stewart, J. P., Nweke, C., Brandenberg, S. J., Goulet, C. A., & Graves, R. W. (2020, 07). Modeling site response effects in sedimentary basins. Oral Presentation at 2020 SCEC Annual Meeting.

Related Projects & Working Groups
Earthquake Engineering Implementation Interface (EEII)