西南地区前兆震群以及显著地震与区域强震的时空特征

Precursor earthquake swarms in Southwest China,Space-temporal characteristics of prominence earthquakes and regional strong earthquakes

本文系统清理并分析了西南划分的五个预报区[1]中的强震发生前的前兆震群和显著性地震特征。在西南划分的五个预报区中,各区域的前兆震群和显著地震存在共性特征,但又具有明显的区域个性。从共性特征上看,西南划分的五个预报区的前兆震群和显著性地震发生后1-2年可能发生强震,强震一般发生在前兆震群或显著性地震附近地区或相关联构造带上;川滇往往是块体内部构造较复杂的区域,发生的强震会有前兆震群或显著性地震发生。从个性特征上看,西南划分的五个预报区的前兆震群和显著性地震发生与西南地区的地震地质构造具有一定关系,也就是说特殊的构造使得各区域的前兆震群和显著性地震具有明显的个性特征。

We divide Southwest China area into 5 research sub-areas and then analyze the space-temporal characteristics on the precursory earthquake swarms and the prominence earthquakes before a strong earthquake. In 5 areas in Southwest China the characteristics of precursory earthquake swarms and prominence earthquakes in every are alike but at the same times are different according to every areas. From the common character, 5 predicting areas in Southwest China after a precursory earthquake swarm and a prominence earthqauake occureed for 1 to 2 years, a strong earthquake may occur and the epicenter may be located at the location of the precursory earthquakes or the relative falut belts. Sichuan and Yunnan fault block teetonics are complex. Before a strong earthquake there is a precusory earthquake swarm or a prominence earthquake. In another words, in 5 predictive areas the precursory earthquake swarm and the prominence earthquake are relative to a strong earthquake and are relative to the seismological geological structures of Southwest China.