Reproducibility of characterizing models for sources of tsunamis arising from interplate earthquakes of magnitudes up to Mw 8.8

In this study, we built characterizing models for tsunami sources based on Sugino et al. (2014) for interplate earthquakes of magnitudes up to Mw 8.8 and earthquakes along the Nankai Trough. To evaluate the reproducibility of the models, we calculated the geometric mean K and the geometric standard deviation κ based on Aida's work (1977). The calculated values of κ were uniformly higher than those reported by Sugino et al. (2014), who calculated κ for earthquakes with magnitudes Mw 8.9 or more. We also attempted to improve the characterizing models for the tsunami source considered by Sugino et al. (2014) based on the results of developed models. Even in the case of the characterized source model for Mw 8.1, it was found that two-level slip distribution in a large slip area and a background area is more effective than the uniform slip based on the study by Sugino et al. (2014). (author)