In this study,we simulated the transport of a large coralline boulder on southern Ishigaki Island of the Sakishima Islands,Japan,to evaluate local paleotsunami size in comparison to a well-known historical event(the 1...In this study,we simulated the transport of a large coralline boulder on southern Ishigaki Island of the Sakishima Islands,Japan,to evaluate local paleotsunami size in comparison to a well-known historical event(the 1771 Meiwa tsunami).According to the geological evidence,the boulder was deposited at 10 m elevation by two paleo-tsunami events.We assumed two types of fault models and eight dislocations for each fault.Then we investigated whether there are any combinations of the fault models that can satisfy the movement of the boulder from its presumed initial position to the present position by two tsunamis.Results show that several combinations of tsunami source models can satisfy the geological constraints.展开更多
基金supported by Grants-in-Aid from the Japanese Ministry of Education,Culture,Sports,Science,and Technology to Goto(23684041)a Grant-in-Aids from the Japan Society for the Promotion of Science(22241042,26242033)from IRIDeS,Tohoku University to Imamura.
文摘In this study,we simulated the transport of a large coralline boulder on southern Ishigaki Island of the Sakishima Islands,Japan,to evaluate local paleotsunami size in comparison to a well-known historical event(the 1771 Meiwa tsunami).According to the geological evidence,the boulder was deposited at 10 m elevation by two paleo-tsunami events.We assumed two types of fault models and eight dislocations for each fault.Then we investigated whether there are any combinations of the fault models that can satisfy the movement of the boulder from its presumed initial position to the present position by two tsunamis.Results show that several combinations of tsunami source models can satisfy the geological constraints.
