This respository contains research code and input data for the 2023 revision of Australia's National Seismic Hazard Assessment (NSHA23). Geoscience Australia has tried to make the information in this repository as accurate as possible. However, it does not guarantee that the information is totally accurate or complete. Information and data within this repository is likely to change frequently and without notice whilst we are actively developing the NSHA23. Therefore, care should be taken if relying on this information to make commercial decisions. Further licencing information is provided here.