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- S33B-0251: Increasing the Spatial Resolution in Physics-Based Site Term Estimates: Results from Southern San Andreas Ruptures
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Board 0251‚ Hall EFG (Poster Hall)NOLA CC
Author(s):Generic 'disconnected' Message
John Rekoske, Scripps Institution of Oceanography (First Author, Presenting Author)
Dave May, Scripps Institution of Oceanography
Alice-Agnes Gabriel, Scripps Institution of Oceanography
Scott Callaghan, Statewide California Earthquake Center
Estimating earthquake hazard can involve simulations that predict how strong ground shaking could be at various locations. However, running detailed simulations for many locations and fault scenarios can be computationally demanding and expensive. To reduce costs, researchers sometimes calculate ground shaking at fewer locations and then estimate (or interpolate) values in between. But it remains unclear how accurate these interpolations are. We performed highly detailed simulations of earthquakes occurring along approximately 630 km of the Southern San Andreas Fault in California. By comparing our detailed, high-resolution results to interpolations based on fewer locations, we found significant differences, up to three times, in predicted shaking levels. These findings highlight areas where interpolation methods may underestimate or overestimate earthquake hazards. To address these challenges, we plan to develop faster computational methods and machine learning techniques. These advancements aim to improve the accuracy and efficiency of future earthquake hazard estimates, ultimately contributing to better preparedness in earthquake-prone regions.
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