【摘要】 针对大地震发生时受灾严重而又缺少地震记录的地区,本文利用地表观测到的常时微动数据进行地震动的估算,并对此方法进行了论证。这个方法涉及两个关键步骤,即利用常时微动的H/V谱来推测观测点的地下速度结构模型,和通过震源模型合成基岩处的输入地震波。此方法基于震源模型并有效地考虑场地效应的影响,有望在缺少地震记录的受灾地区进行地震动的估算方面得到应用。更多还原

【Abstract】 This study aims to verify the estimation method of ground motions at the target sites,e. g.,heavily damaged sites near the strong-motion station during a great earthquake,by use of microtremor data observed on the ground surface. This method involves two key procedures,i. e.,identification of underground velocity structure model from microtremor H / V spectrum and synthesis of ground motions at the seismological bedrock using source model during the mainshock. It takes the source model into account,appropriately estimates the site effect as well. It is expected to be applied in the estimation of ground motions at target sites where the earthquake records are not observed.更多还原