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In order to predict strong ground motions by the stochastic Green's function method, the envelope characteristic and the amplitude characteristic of seismic bedrock motions are needed. Because site ef...fects greatly influence observed earthquake motions, when the seismic bedrock motions are estimated based on the observed earthquake motion records, the site effects included in the records must be removed. In this paper, first, the site effects are removed from the observed records based on the 1-D multi-reflection theory using underground structures down to the seismic bedrock. And the stochastic envelope characteristics of the seismic bedrock motions in Chugoku-District are estimated by regression analysis with the hypocentral distance and the moment magnitude.show more
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