地震前后静应力变化分析  

Simulation analysis on stress changes and water level offsets before and after earthquakes

作　　者：郑江蓉[1] 江昊琳[1] 徐桂明[1] 杨从杰[1] 孟科[1] 

机构地区：[1]江苏省地震局,中国南京210014

出　　处：《地震地磁观测与研究》2012年第1期1-6,共6页Seismological and Geomagnetic Observation and Research

基　　金：国家自然科学基金(40901272);江苏省科技厅项目(BS2007084)

摘　　要：以1984年5月21日南黄海6.2级地震为例,计算距震中175 km的苏20井同震水位阶变的应力变化,结果表明,地震造成的应变变化与同震水位阶所反演的应变变化具有相同的数量级,地震引起的同震水位阶代表了地震造成的应力(应变)大小,具有动力学含义。This paper quantitatively discusses that static stress changes at the epicenter and nearby area after different types of the earthquakes occurred by establishing concept model. Taking the southern yellow sea earthquake on May 21th, 1984 as an example, the stress changes of coseismic water level offsets recorded by the water level of Jiangsu 20th well about 175 km away from the epicenter were calculated. The results show that： The stress changes caused by earthquake and the stress changes inversed by eoseismic water level offsets are having the same order of magnitude. The water level offsets caused by earthquake can reflect the magni- tude of the stress produced by earthquake and it has dynamical meanings.

关 键 词：概念模型 同震水位阶变 应力(应变) 

分 类 号：P315[天文地球—地震学]