Source characterization of short-period ground motion generation for construction of source model of wide-period-band strong motion prediction

本研究的目的是改进用于强地面运动预测的特征震源模型参数。1）震源运动学模型的编制利用强震资料编制了近年来的破坏性震源模型。同时还得到了2002年Denali地震和2004年Chuetsu地震的运动学震源模型。2）应力参数的估计利用运动学震源模型，得到了断层面上应力的时空变化，并表征了地壳内地震和板间地震断层上的应力参数。微凸体内外的应力参数分别约为20MPa和5MPa。3）板内和板间地震的强震发生区（SMGA）对板内和板间地震的强震发生区进行了估计，板内地震的强震发生区大小也与深度有关。这些应力参数在粗糙面上的变化趋势，对构造宽周期范围强震预报的震源模型是有用的。这些结果作为论文发表在以下参考文献中。

The aim of this study is to improve parameters of the characterized source model for strong ground motion prediction. For the sake, the following subjects were studied.1)Compiling kinematic source modelResent destructive earthquake source models by strong motion data are compiled. I also obtain the kinematic source models of the 2002 Denali earthquake and the 2004 Chuetsu earthquakes. I also collected the source model of the 2003 Tokachi earthquake.2)Estimation of stress parametersI obtained spatio-temporal stress change on the fault plane using the kinematic source models and characterized the stress parameters on the fault of the inland-crustal, and interplate earthquakes. Stress parameters on and off the asperity is approximately 20MPa and 5MPa, respectively. And there is slightly depth dependence of stress parameters on the asperity.3)Strong motion generation area (SMGA) of in-slab and interplate earthquakes.I estimated strong motion generation area for the in-slab and interplate earthquakes and there is also depth dependence on the size of SMGA for the in-slab earthquakesAlthough there is not so many number of events analyzed, these tendency of stress parameters on the asperity is useful for constructing the source model for wide-period-range strong motion prediction. These results are published as a paper in the following reference.