摘要
"源线模式"是根据震源有关的某些长距特征线的交会预测地震的模式.模式是用两个特征线交会点作为强震预测的发生区,第一个特征线是与区域主压应力夹45°的角所形成的最大剪切线,由于这个线是由多组平行线所组成,若沿某条线其前兆分布多或者前兆沿线展布的长,则定义为A型特征线.而另一个特征线是震兆共迁线,震兆共迁线定义为在历史上地震—地震迁移或前兆——地震迁移组成的线,即定义为B型特征线,A型线与B型线的交会地区,即为预测的强震震中区.以该模式分析了1975年海城地震、1976年唐山地震和2008年汶川地震的实例.
The Sourse-line model is model based on the intersection of some long characteristic lines associated with Seismic source to predict the earthquake. The first characteristic line is the largest shear line formed by the angle of 45 degrees of regional principal compressive stress. Because this line is composed of many parallel lines, if the precursor distribution along a line is more or the length along the precursor distribution, it is defined as type A characteristic line. Another characteristic line is the precursor co-migration line, which is defined as the line composed of earthquake-earthquake migration or precursor-earthquake migration in history, i.e. the B-type characteristic line. The intersection area between the A line and the B line is the predicted epicenter of strong earthquake.This model is used to analyze the 1975 Haicheng earthquake, the Tangshan earthquake of 1976 and the Wenchuan earthquake in 2008.
作者
郭增建
郭安宁
任栋
GUO Zeng-jian;GUO An-ning;REN Dong(The Lanzhou Institute of Seismology,CEA,Lanzhou 730000,China)
出处
《地球物理学进展》
CSCD
北大核心
2018年第6期2228-2233,共6页
Progress in Geophysics
关键词
区域主压应力方向
最大剪切线
震兆共迁线
两线交会点
大震震中区预测
direction of regional principal compressive stress
maximum shear line
earthquake-precursor comigration line
intersection of both two line
prediction of the epicenter position of big earthquake
