Abstract
We investigate near-field ground-motion variability by computing the seismic wavefield for five kinematic unilateral-rupture models of the 1992 Mw 7.3 Landers earthquake, eight simplified unilateral-rupture models based on the Landers event, and a large Mw 7.8 ShakeOut scenario. We include the geometrical fault complexity and consider different 1D velocity–density profiles for the Landers simulations and a 3D heterogeneous Earth structure for the ShakeOut scenario. For the Landers earthquake, the computed waveforms are validated using strong-motion recordings. We analyze the simulated ground-motion data set in terms of distance and azimuth dependence of peak ground velocity (PGV).
Our simulations reveal that intraevent ground-motion variability Graphic is higher in close distances to the fault (
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1584-1599 |
| Number of pages | 16 |
| Journal | Bulletin of the Seismological Society of America |
| Volume | 106 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jun 21 2016 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: We thank Rob Graves for providing us with the source model of the ShakeOut scenario and Paul Spudich for sharing with us his MATLAB scripts to compute the directivity corrections. We thank Fabrice Cotton for his critical review that helped us to improve the manuscript. We also thank Kiran Kumar Thingbaijam for insightful discussions. The research presented in this article is supported by King Abdullah University of Science and Technology (KAUST) in Thuwal, Saudi Arabia. Earthquake rupture and ground-motion simulations have been carried out using the KAUST Supercomputing Laboratory (KSL), and we acknowledge the support of the KSL staff.