A STUDY ON METHODS FOR APPLYING FAULT MODELS RAPIDLY ESTIMATED USING REAL-TIME GNSS TO TSUNAMI SIMULATION

Abstract

 Applicability of rapidly estimated fault models based on real-time GNSS to tsunami simulation was examined, in comparison to tsunami survey data in 2011 off the Pacific coast of Tohoku Earthquake. GNSS models could show acceptable reproducibility in terms of tsunami height along the Pacific coast except the ria coast in Sanriku where considerably high tsunami observed in 2011. Tsunami inundation for lowland was fairly modeled by GNSS models in the case of city areas facing the Ishinomaki Bay. We also proposed a new method for rapidly estimating initial tsunami height from a slip distribution model that consists of a number of triangular sub-faults through approximation to a set of rectangular sub-faults.