滇西地区应力场和Q值的时空变化与地震前兆分析  

TIME-SPACE VARIATIONS OF REGIONAL STRESS FIELD AND Q-VALUE AND ANALYSIS ON SEISMIC PRECURSORS

作　　者：秦嘉政[1] 阚荣举[1] 王绍晋[1] 宋文[1] 黄毓珍[1] 

机构地区：[1]云南省地震局

出　　处：《地震》1992年第5期44-53,共10页Earthquake

摘　　要：本文用云南滇西地区及邻区从1970—1988年共19年期间内约1万个中小地震资料,采用联合求解区域应力场P轴方位和剪应力值τ_θ以及用地震尾波方法,把该区分为7个小区域,讨论了区域应力场方向、强度和尾波Q值随时间和空间的变化特征。在此基础上,给出了分析地震前兆性关系的某些定量指标,并在日常的地震预报工作中取得了较好的检验效果。By using the unitedly finding the solution of the P-axis orientation of the regional stress field and shear stress value τ0 as well as the seismic coda wave method, this paper divided the western Yannan Province and its vicinity into seven subregions, discussed the direction and strength of regional stress field and the variation features of the coda Q-value with time and space based on seis mic data of 10000 moderate-small earthquakes in the western Yunnan province and its vicinity in a period of 19 years from 1970 to 1985. Accordingly, some quantitutive indexes analyzing seismic precursory relation were given and obtained comparatively fine examination results in daily earthquake prediction.

关 键 词：地震 前兆 时空变化 Q值 应力场 

分 类 号：P315.7[天文地球—地震学]