摘要
本文以观测事实和实验资料为基础,提出强震前存在着两类基本临震前兆,一类是临震前震源区出现前震或前震序列,一类是震前震源区及其附近发生大量值形变。文中讨论了它们的基本特征,并给出了一个弹簧滑块简化模式来说明这些基本临震前兆的机理。对该模式做数字模拟计算,其结果与实验得到的应力应变曲线相当一致。
In this paper,based on the observational data and experimental results,we proposed that there are two basic kinds of immediate precursors before strong earthquakes. One of them is foreshocks or fore-shock sequence occurring in the source region and the other is apparent deformations appearing in the source region and its surroundings. The fundamental features of the two immediate precursors have been discussed and a spring-slide block model has been given for explaining their mechanism. The quantitative results of the model are consistent with the stress-strain curves recorded in laboratory experiments.
出处
《中国地震》
CSCD
北大核心
1989年第3期73-79,共7页
Earthquake Research in China
