Development of NGA-Sub Ground Motion Model of 5%-Damped Pseudo-Spectral Acceleration Based on Database for Subduction Earthquakes in Japan

Date: 4/24/2019

Time: 06:00 PM

Room: Grand Ballroom

We developed an empirical ground motion model (GMM) for subduction earthquakes in Japan. The model is based on the extensive and comprehensive subduction database in Japan by Pacific Engineering Research Center, and was developed for the RotD50 horizontal components of peak ground acceleration (PGA), peak ground velocity (PGV), and 5%-damped elastic pseudo-absolute acceleration response spectral ordinates (PSa) at the selected periods ranging from 0.01 to 10 sec. The model includes terms and predictor variables considering tectonic setting (i.e. interplate and intraslab), hypocenter depths, magnitude scaling, distance attenuation, and site responses. The magnitude scaling derived in this study is well constraint by the data observed during the large-magnitude interface events in Japan (i.e. 2003 Tokachi-Oki earthquake, 2011 Tohoku earthquake) for different periods. The developed GMPE covers subduction earthquakes occurred in Japan for magnitudes ranging from 5.5 to as large as 9.1 with distances less than 300 km from the source.

Presenting Author: Hongjun Si

Authors