辽宁地区震群序列性质的研究

利用经验类比的方法, 对 1999年 11月岫岩偏岭震群序列及以往在辽宁地区发生一些典型的具有地震预报意义的前兆震群和前震序列进行了详细研究。 结果显示, 前兆震群与前震序列之间差别很大, 其性质和前兆特征迥然不同。 1999年 11月岫岩 5. 6级地震震前序列与 1975 年海城 7. 3级地震前震序列特征及性质相同, 属于前震序列。 同时, 研究结果中也包含了判别地震序列性质的方法和须要注意的问题。

Study on nature of earthquake swarm sequences in Liaoning region

To make use of methods of the statistical feature and the analogy prediction, some earthquake swarms and foreshock sequences with typical prediction sense occurred in Liaoning in the past are studied in detail. The results show that there are a lot of obvious differences between foreshock sequence and precursory earthquake swarms. Their nature and precursory characteristics are distinct. The nature and precursory characteristics of pre seismic sequence of M S 5.6 earthquake occurred in Xiuyan Haicheng in 1999 are similar to that of foreshock sequence of M S7.3 earthquake occurred at Haicheng in 1975, both of them belong to foreshock sequence. Meanwhile, the research results also include the methods for judging of earthquake sequences and the problems necessary to pay attention.