SEGJ Technical Conference

Modeling subsurface structure for ground-motion simulation in Sendai plain by receiver-function inversion

Abstract We performed multi-station joint inversion of receiver functions derived from earthquake records obtained at 10 sites in Sendai plain, and modified the model by Japan Seismic Hazard Information Station, National Research Institute for Earth Science and Disaster Prevention based on the inversion result. We then carried out earthquake ground-motion simulation of a deep event which occurred east off Miyagi Pref. by using the modified model, and confirmed that the synthetic waveforms by the modified model agreed with the observed ones better than those by the original model by J-SHIS except for the northwestern area with the thickest sedimentary layer. Therefore, we conclude that modifying the model by referring to the multi-station joint inversion of receiver functions is effective in improving reproducibility of observed earthquake records by ground-motion simulation at many stations.