新疆地震序列分析研究

A Study on Xinjiang Earthquake Sequence

当地震发生后,判断地震类型对预测后面有没有地震,有多大地震非常重要。对新疆29次5级地震序列系统分析后得出,b值、h值、P值、ΔM、k值和能量比均不能准确无误的判断震型;当序列完整程度较好时,k值对判断地震类型有一定意义,能量比有确定性意义;利用能量比对主余型和孤立型地震进行快速判定准确程度较高,而对多震型地震存在错判可能。分析地震序列前期的时频度衰减曲线有可能区分出多震型地震,但快速区分间歇双震型和震群型地震较为困难。发生在盆地边缘及其附近地区是新疆震群型地震在空间分布方面的特点。

By analyzing 29 sequences with earthquake type precisely by the parameters of energy ratio.When one sequence is complete, the magnitude of 5, we couldn＇t judge the b value, h value, P value, AM, k value and k value is significant in a degree to judge earthquake sequence, and energy ratio is certainly the mainshock-aftershock type and isolated shock significant. The correct ratio of rapidly judging with energy ratio is high, but it is possible for multi-shock type of earthquake sequence to make a mistake. By analyzing the early phase of frequency decay, it is possible to identify multi-shock earthquake sequence, but it is difficult to rapidly judge intermittent double-shock and swarm. The remarkable character of spatial distribution of all kinds of Xinjiang earthquakes is that swarm-type earthquakes occur in basin and its surrounding.