Estimation of ground motion variability in the CEUS using simulations
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Abstract
We estimate earthquake ground-motion variability in the central and eastern U.S. (CEUS) by varying the model parameters of a deterministic physics-based and a stochastic site-based simulation method. Utilizing a moderate-magnitude database of recordings, we simulate ground motions for larger-magnitude scenarios M6.0, 6.5, 7.0, 7.5, and 8.0. For the physics-based method, we vary the faulting mechanism, slip, stress drop, rupture velocity, source depth, and 1D velocity structure. For the stochastic method, we simulate realizations using a set of six model parameters, each of which has a pre-assigned probability distribution. The median spectral accelerations over all synthetic realizations are compared with the NGA-East models. The synthetic standard deviation for deterministic simulations ranges from approximately 0.4 to 0.85 for various magnitudes and distances, whereas that for stochastic simulations is between 0.48 and 1.04. Based on the simulation results and comparisons with NGA-East variability models, a range for ground motion variability in the CEUS is discussed.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Estimation of ground motion variability in the CEUS using simulations |
| DOI | 10.22725/ICASP13.075 |
| Year Published | 2019 |
| Language | English |
| Publisher | Seoul National University |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 75; 8 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | ICASP 13 Proceedings |
| Conference Title | 13th International Conference on Applications of Statistics and Probability in Civil Engineering (ICASP13) |
| Conference Location | Seoul, South Korea |
| Conference Date | May 26-30, 2019 |
| Google Analytic Metrics | Metrics page |