Simulation of the 2022 Mw 6.6 Luding, China, earthquake with the updated EXSIM
Abstract Stochastic finite-fault ground motion simulation is extensively utilized across a range of scientific and engineering fields. The current theoretical modeling of corner frequency in the source spectrum model is flawed, as it fails to take the rupture velocity into account. We have modified...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2025-08-01
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| Series: | Discover Geoscience |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s44288-025-00218-2 |
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| Summary: | Abstract Stochastic finite-fault ground motion simulation is extensively utilized across a range of scientific and engineering fields. The current theoretical modeling of corner frequency in the source spectrum model is flawed, as it fails to take the rupture velocity into account. We have modified the corner frequency model and established the source spectrum model considering the rupture velocity, which makes the source spectrum model more consistent in theory. We employed stochastic finite-fault simulation for the 2022 Mw 6.6 Luding earthquake in China, analyzing data from 10 strong-motion stations located within 100 km of the epicenter, utilizing a stochastic finite-fault model that incorporates an updated corner frequency model. The obtained strong ground motion records are compared with those calculated by the stochastic finite-fault model (EXSIM), in time domain and frequency domain. At the same time, the percentage difference between the simulated PGA and the measured PGA was calculated. The results show that the strong ground motion records obtained by the updated EXSIM are closer to the real ones in the time domain, and the strong ground motion records calculated by the updated EXSIM and the EXSIM are both close to the real ones in the frequency domain. |
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| ISSN: | 2948-1589 |