USE OF STRONG MOTION DURATION FOR RAPID EVALUATION OF FAULT PARAMETERS
USE OF STRONG MOTION DURATION FOR RAPID EVALUATION OF FAULT PARAMETERS
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利用强运动持续时间快速评估故障参数
DOI：
10.4294/jpe1952.35.171
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
Tomowo Hirasawa
中科院分区：
文献类型：
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作者：
Y. Izutani;Tomowo Hirasawa
提出了一种由强震持续时间的方位依赖关系快速确定浅源大地震断层参数的简便方法。该方法可以在发震后的较短时间内对断层长度和破裂传播方向进行评估。作为例子，确定了1968年5月16日东京-冲之地震的断层参数。它们与其他研究者从远场长周期地震记录、近场强震记录和余震分布中揭示的主破裂过程是一致的。因此，只要安装足够数量的具有良好方位覆盖的数字加速度计，本方法可能适用于近场海啸预警。
A simple method is developed for rapid determination of fault parameters of a large shallow earthquake from the azimuthal dependence in duration of strong ground motion. The fault length and the direction of rupture propagation can be evaluated by this method within a short time after the earthquake origin time. As an example, the fault parameters are determined for the Tokachi-Oki earthquake of May 16, 1968. They are consistent with the main rupture process revealed by other investigators from far-field long-period seismic records, near-field strong motion records and aftershock distribution. Thus, the present method may be applicable to near-field tsunami warning, provided that a sufficient number of digital accelerographs are installed with a good azimuthal coverage.