三峡库区地震调制比分析

ANALYSIS OF SEISMIC MODULATING RATIO OF THREE GORGES AREA

为探寻未来震源区及高应力集中区,用地震调制比方法对三峡库区2000～2005年ML≥2.0地震进行时空扫描发现,地震调制比随时间和空间的变化均未出现异常,表明该区地壳介质分布较均匀,总体应力水平不高,处于较稳定状态,不存在高应力集中区。

The ML ≥2.0 earthquakes occured in the Three Gorges area during 2000 to 2005 are spatially and temporally scanned with the method of seismic modulating ratio to find out the potential focal region and high stress concentration zone. The results show that the anomaly of seismic modulating ratio does not occur with the change of time and space, it indicates that the distribution of crustal media in the Three Gorges area is comparatively uniform, the stress level is not high and in a steady state, and there is no high stress concentration zone in this area.