Multi-cycle simulation of reverse-slip earthquake rupture for use in ground motion simulations
| Autor: | Galvez, P., Petukhin, A., Somerville, P., Yoshida, K., Irikura, K. |
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| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-2528 |
| Popis: | Realistic dynamic rupture modelling validated by observed earthquakes is necessary for estimating parameters that are poorly resolved by seismic source inversion, such as stress drop, rupture velocity and slip rate function. In this study, to generate many physically self-consistent rupture models, we use earthquake cycle simulations under the rate-and-state friction law. In Galvez et al. (2021) for strike-slip fault, we demonstrated that this approach could generate ruptures well validated by observations. This study continues work of Galvez et al. (2021) for reverse fault: the quasi-dynamic solver QDYN is used to nucleate the seismic events and the spectral element dynamic solver SPECFEM3D to resolve their rupture process. To simulate realistic seismicity, 2D correlated heterogeneous von-Karman distributions of characteristic weakening distance (Dc) is applied. Other important parameters are the normal stress and the maximum value of Dc. We generate a set of spontaneous rupture models in magnitude range Mw 6.5-8.0, and validate them by source scaling, ground motion and fault displacement.Acknowledgements. This study is based on the 2022 research project ‘Examination on characterized source models for inland crustal earthquakes’ by the Secretariat of Nuclear Regulation Authority (NRA), Japan. The Super Computer Shaheen II at KAUST University has been used to run the models presented in this study.Galvez, P., A. Petukhin, P. Somerville, et. al. (2021). Bull. Seismol. Soc. Am. 111, 2463–2485, doi: 10.1785/0120210104 The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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