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首页> 外文期刊>Earth, planets and space: EPS >A Characteristic Change in Fractal Dimension Prior to the 2003 Tokachi-oki Earthquake (M_J = 8.0), Hokkaido, Northern Japan
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A Characteristic Change in Fractal Dimension Prior to the 2003 Tokachi-oki Earthquake (M_J = 8.0), Hokkaido, Northern Japan

机译：日本北海道2003年十胜冈地震（M_J = 8.0）之前的分形维数特征变化

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摘要

Changes in form of hypocenter distribution preceding the 2003 Tokachi-oki Earthquake (MJ = 8.0) were investigated by using the analysis of temporal variation in spatial fractal dimension D. In this study, it was found that the D value began to decrease in 1998, and had been very small for about one year before the main shock occurrence. Such a D decrease before the main shock occurrence is a characteristic of some recent large earthquakes. Therefore, the D decrease may be an earthquake precursor. The D value decrease is yielded by both of seismic activation and quiescence which have often been reported as an earthquake precursor, due to a property of the calculation method. Therefore, the D change can be detected, even if the seismic activation and quiescence occur simultaneously in which case the number of earthquakes does not change significantly. On account of this property, using the D value is advantageous to detect the precursory change of seismic activity before a large earthquake.
机译：通过对空间分形维数D的时间变化进行分析，研究了2003年十胜冈地震（MJ = 8.0）之前震源分布形式的变化。在这项研究中，发现D值在1998年开始下降，并且在发生主要电击之前已经很小了一年。在主震发生之前这种D减小是最近一些大地震的特征。因此，D减小可能是地震的先兆。由于计算方法的特性，D值的减小是由地震激活和静止引起的，地震激活和静止都经常被报告为地震前兆。因此，即使地震激活和静止同时发生，在这种情况下地震的次数也不会显着变化，因此可以检测到D变化。由于此特性，使用D值有利于检测大地震之前地震活动的先验变化。

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