强震前震源区附近地震学参数中期震兆标志研究

以1975年以来中国大陆6．0级以上地震震例作为研究对象，在一定的扫描时段和扫描半径等条件的约束下，选择了10种物理意义明确、独立性较强的测震学指标，对大陆西南、华北、西北3个研究区进行了强震前震源区附近地震学参数中期震兆标志研究，结果发现，西南研究区15个震例异常的平均对应率为0．8，华北研究区10个震例的异常的平均对应率为0．7，西北研究区18个震例异常的平均对应率为0．7。提取了中国大陆强震测震学指标分区预测标志，西南研究区为0．8，华北研究区为0．7，西北研究区为0．7。

STUDY ON SEISMOLOGY PARAPETER MEDIUM-RANG PRECURSOR SYMBOL BEFORE STRONG EARTHQUAKE AROUND HYPOCENTER AREA

This paper has studied the seismology parameter medium-range precursor symbol before strong earthquake around hypocenter area in southwest china north northwest area,its reseach object is above Ms6.0 since 1975 in chinese mainland.The condition of the scan period of time and radius is restricted,and choosed 10 terms independency seimology parameter that has definitude physics mean.The result shows that the average corresponding ratio of 15 earthquakes in southwest is 0.77,the average corresponding ratio of 10 earthquakes in china north is 0.70,the average corresponding ratio of 18 earthquakes in northwest is 0.69.On this condition,the precursor symbol of seismology parameter in chinese mainland is distilled.The research area in southwest is 0.77,the research in china north is 0.70,the research in northwest is 0.69.