地震前兆群体空间非均匀性指标C_v值及其应用问题探讨

Discussion on application of spatial inhomogeneity parameter C_v to identification of earthquake precursor group

Cv值是描述前兆分布非均匀性的一个有效指标。不同观测指标获取的震前Cv值异常证明了该方法预测地震的有效性。然而Cv值与观测指标的时间(或空间)分布形式(如周期分布、准周期分布、泊松分布、成丛分布等)并不是简单的对应关系。文中在回顾Cv值研究与应用进展的基础上,对Cv值与其分布特征的关系进行了深入分析,指出了应用中存在的问题,从而加深对Cv值物理意义的理解。并给出了Cv值识别前兆群体异常的判别法则。

The parameter C_v is available in describing the spatial inhomogeneity of earthquake precursory group. The validity of anomaly of C_v obtained from variety of observatory methods before earthquakes has been proved in a certain degree in earthquake forecast, however, the C_v value is not simply corresponding to the statistical distributions such as period, sub-period, Poisson, and clustering one et al. Based on review of research and application of C_v in the paper, further analysis is done on C_v value and its relation with the statistical distributions, especially to the problem existed in the application. The discussion is expected to be comprehensive in the physical implication of C_v . The discriminance to identify the anomaly of earthquake precursor group by using C_v is also provided in the paper.