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震预测的特征震源模型的参数。为此，开展了以下工作：1)建立了运动学震源模型。利用强震资料编制了破坏性震源模型。我还得到了2002年德纳利地震和2004年楚楚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裂面的时空应力变化，刻画了内陆-地壳断裂和板间地震的应力参数。粗糙面上、外的应力参数分别约为20 Mpa和5 Mpa。3)板内和板间地震的强震产生区(SMGA)估计了板内和板间地震的强震产生区，板内地震的强震产生区的大小对SMGA的大小也有深度依赖性。虽然分析的事件数量不多，但这些应力参数在粗糙面上的趋势有助于建立大周期范围强震预报的震源模型。这些结果以论文形式发表在下面的参考文献中。

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.