5:15 PM - 6:30 PM
[SSS25-P07] Stochastic Green’s Function Method Incorporated Empirical Site Effects in Time Domain
Keywords:Site Effects, Time Domain, Stochastic Green’s Function Method, Strong Ground Motion Method
We simulate observed seismic records for large events (e.g. the 2011 Tohoku Earthquake) by incorporating the non-stationary site effects, which was proposed by Akazawa et al. (2009), with the stochastic Green’s function method. Bedrock ground motions from a small event are stochastically simulated with the omega-squared model and an envelope time function depending on source size and propagation path. Bedrock ground motions from a large event are evaluated taking fault model into account in the same procedure as the empirical Green’s function. Surface ground motion from the large event is calculated with a convolution of the bedrock motion with the non-stationary site effects. This method applied to some large events whose source models are known. The simulated results agree well with the obtained seismic records.