摘要
本文分析了1989年10月19日大同—阳高M_s6.1地震、1990年7月21日大海坨M_s4.5地震前狼山流动水准前兆异常特征,并讨论了与地震的关系。研究认为,同一测点前兆异常具有相似性特征;分析台点所处地质构造背景,查明闭锁段,是未来发震地点预测的关键;立足于长期大量的坚实工作,不失时机,才能提出较好的短临预测意见。
This paper analyzed the precursory anomaly features of Langshan mobile levelling values before Datong-Yanggao Ms 6.1 earthquake on Oct. 19, 1989 and Dahaituo M. 4.5 earthquake on July 21, 1990. There occurred tensional anomaly activity across the fault before both earthquakes and a sudden compressive activity across the fault was monitored one week before the earthquakes. Two earthquakes occurred on both extensional ends of the fault. Based on the analysis and study of precursory anomaly, and prediction for two earthquakes to varying degrees was made according to this precursor, especially the short-impending prediction opinion was proposed for Dahaituo earthquake, the time and site predicted is relatively successful. Studies reveal that the precursory anomaly at the same station is of similar features, and find out that the locked segment of the fault is a key for predicting the future causative site. So long as the long-term and a good number of solid works are well completed, we are able to present better short-term and impending prediction opinion.
出处
《地震》
CSCD
北大核心
1992年第2期1-7,共7页
Earthquake
