気象庁マグニチュードによる震源スペクトルのスケーリング則

概要

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In most of the former studies of the attenuation relation, the increasing amplitude of the earthquake ground motion with earthquake magnitude was expressed by the linear relation of the magnitude. However, when the ω^<-2> model is assumed, the corner period of the spectrum varies with the magnitude, and the scaling law of the source psectrum amplitude becomes a complicated function of magnitude. Based on the ω^<-2> model, a relation between M_o and M_J was derived from the data of 63 events whose M_J are ranging from 3. 9 to 8. 2. Further, the theoretical scaling law of the source spectrum obtained from the relation was approximated with the M^^2__J term of the attenuation relation. This approximation was confirmed from the strong-motion accelerograms from the large events occurred in the northern Japan.
社団法人日本建築学会の論文
1991-07-30