Scaling relationship between the duration and the amplitude of non‐volcanic deep low‐frequency tremors
Scaling relationship between the duration and the amplitude of non‐volcanic deep low‐frequency tremors
复制标题
非火山深部低频震颤持续时间与振幅之间的尺度关系
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
K. Obara
中科院分区：
文献类型：
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作者：
Tomoko Watanabe;Y. Hiramatsu;K. Obara
我们研究了日本西南部东海地区非火山深低频（DLF）地震的持续时间-振幅关系，以限制地震的震源过程。我们应用两种模型的分布，一个是指数模型的规模约束分布和其他的幂律模型的规模不变分布。指数模型显示出比幂律模型更好地拟合震颤的持续时间-振幅分布，这意味着DLF震颤是由尺度约束源过程引起的。因此，DLF地震的震源过程不同于地震。我们认为，非火山DLF震颤可能是由一个固定的源尺寸与可变的流体超压或可变的应力降。
We investigate a duration‐amplitude relation of non‐volcanic deep low‐frequency (DLF) tremors in the Tokai region, southwest Japan, to constrain the source process of the tremors. We apply two models to the distribution, one is an exponential model as a scale bound distribution and the other a power law model as a scale invariant distribution. The exponential model shows a better fit to the duration‐amplitude distribution of the tremors than a power law model, implying that the DLF tremors are caused by a scale‐bound source process. The source process of the DLF tremors, therefore, differs from those for earthquakes. We suggest that the non‐volcanic DLF tremor is possibly caused by a fixed source dimension with variable excess pressure of fluid or variable stress drop.