Abstract
Prediction relation of response spectra was derived by using earthquake ground accelerations observed in or on rock. The M^2_w term was used for the regression model, because the scaling law of M_w is nonlinear when the source spectra of of ω^<-2> model was assumed. The derived coefficient for the M^2_w term agrees with the value expected from ω^<-2> model. The predicted spectrum from the regression model agrees well with the observed spectrum in near-field during the 1983 Nihonkai chubu earthquake of M_j 7. 7.
