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

短周期地震动震源表征构建宽周期带强震预报震源模型

• 批准号: 15510149
• 负责人: IWATA Tomotaka
• 金额: $ 1.15万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15510149/
• 关键词: Strong ground motion prediction; Source inversion; Characterized source model; Dynamic source parameter; Stress drop; Asperity; In-Slab earthquake; interplate earthquake; 強震動予測

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.

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。

项目成果

岩田知孝, 三宅弘恵: "強震動予測レシピに基づくシナリオ地震による強震動シミュレーション-琵琶湖西岸断層北部を起震断層として-"自然災害科学. (印刷中). (2004)

Tomotaka Iwata，Hiroe Miyake：“使用基于强震动预测方法的情景地震进行强震动模拟 - 使用琵琶湖西海岸断层的北部作为发震断层 -”自然灾害科学（2004 年出版）。

Iwata, T., H.Sekiguchi, H.Miyake, W.Zhang, K.Miyakoshi: "Dynamic source parameters and characterized source model for strong motion prediction"Proc.13^<th> World Conf.on Earthq.Eng. (In printing). (2004)

Iwata, T., H.Sekiguchi, H.Miyake, W.Zhang, K.Miyakoshi：“强运动预测的动态源参数和特征源模型”Proc.13^<th>World Conf.on Earthq.Eng。

Dynamic source parameters of characterized source model for strong ground motion prediction

强地震动预测特征源模型的动态源参数

• 发表时间: 2005
• 期刊: Proc. International Sympo. of earthquake engineering (in printing)
• 作者: Iwata;T. et al.
• 通讯作者: T. et al.

2003年5月26日宮城県沖地震の震源モデルと強震動シミュレーション

2003年5月26日宫城县大木地震的震源模型和强震模拟

• 发表时间: 2004
• 期刊: 地震第2輯 57
• 作者: 浅野公之;岩田知孝;入倉孝次郎
• 通讯作者: 入倉孝次郎

岩田知孝, 三宅弘恵: "シナリオ地震に基づく強震動予測の現状"自然災害科学. 22/3. 23-25 (2003)

Tomotaka Iwata，Hiroe Miyake：“基于情景地震的强地震动预测的现状”自然灾害科学22/3。