Evaluating a unified 3D velocity model for the Los Angeles Basin using ambient noise dispersions and earthquakes

Zhe Jia, & Robert W. Clayton

Published August 14, 2021, SCEC Contribution #11429, 2021 SCEC Annual Meeting Poster #209

The 3D velocity structure of the Los Angeles (LA) Basin plays an important role in prediction of regional ground motion and seismic hazard for this populated area. In this study, we integrate three high resolution velocity models derived using dense seismic arrays, with the standard community velocity model (CVM) as the background, into a unified 3D velocity model for the LA Basin. We evaluate the performance of this unified model using Rayleigh wave dispersions from ambient noise correlations. We find that our model provides better prediction of group velocities than the standard CVM models. We further test the waveform predictions of different models using natural earthquakes in the LA Basin.

Citation
Jia, Z., & Clayton, R. W. (2021, 08). Evaluating a unified 3D velocity model for the Los Angeles Basin using ambient noise dispersions and earthquakes . Poster Presentation at 2021 SCEC Annual Meeting.

Related Projects & Working Groups
Seismology