【摘要】 推导了损伤介质中应力场变化与地面位移场和重力变化的关系 ,讨论了利用地面位移和重力场变化来计算地球内应力场变化的边界元方法。利用中国华北地区的 1992～ 1995年的 GPS观测资料对该地区地壳内 15km深处的应力场变化进行了计算 ,并讨论了应力场变化分布与 1996年发生的包头 MS=6 .6级地震的关系 ,结果表明震区的应力场变化明显大于其他地方更多还原

【Abstract】 The relationship between the earth stress field,earth surface displacement field and the gravity variation in the damaged medium is deduced,and the boundary element method for computing the earth stress variation based on the earth surface displacement and gravity rate is discussed.At last,the stress field variation in the depth of 15 kilometers in the earth crust,in North China,is computed and analyzed by using GPS data observed from 1992 to 1995.the relationship between the stress field variation distribution and earthquake of M S6.6 occurred in Baotou in 1996 is discussed.The results show that the stress variations in the earthquake area are larger than those in the other observed area.更多还原