周边大地震对中国大陆7级以上地震的指示作用及统计分析

Statistical and analysis the instruction of surrounding large earthquake to China mainland M_s≥7.0

据1900年以来的世界大震目录,在统计周边大震与中国大陆地震的对应的过程中,发现尤其是印度尼西亚苏门答腊和巴基斯坦及邻近区域的大地震发生后3年内,我国的7级大震有着明显的呼应性,对应率分别达到了90%和93%以上,并且有着明显的周期性,其优势周期分别为1.2和1.6年,分析认为周边这些区域的大地震对中国大陆地震有很好的指示作用.

Using the catalog of large quakes in the world since 1990, we study the relationship between the major quakes （M≥7） in China mainland and surrounding regions. We find that the events of M≥7 in China were well corresponding to those large shocks in the surrounding regions by correlation 90% and over 93%, particularly in the 3 years after the large earthquakes in sumetra, Indonesia and pakistan. And the erents in the surrounding regions exhibit conspicuous periodicity with dominant values 1.2 and 1.6 years. This analysis suggests that the large quakes in the surrounding regions can be regarded as indicators to the events in China mainland.