5:15 PM - 6:30 PM
[SSS25-P20] Source Azimuthal Dependence of Long-Period Ground Motions in the Kanto Basin and the transition of time-history
Keywords:Long-period ground motion, Source azimuth, Site effect, Kanto Basin
We have investigated the source azimuthal dependence in the Kanto Basin, by data of the observations and the simulations for 10 earthquakes occurred around the Kanto Basin (Noyori et al., 2015). As a result, we could confirmed the same tendency between the observations and the simulations that long-period ground motions larger than 3 seconds were largely amplified for earthquake located in in north-west (Niigata pref.) direction and south-west (Shizuoka pref.) direction. In this study, we investigated the transition of source azimuthal dependence in the time history, which are related to the propagation of seismic motions in the Kanto basin.