利用GPS资料研究区域地壳应力场变化与地震活动关系h

推导了地球内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变化速率来计算地球内应力场变化的边界元方法；最后，利用中国新疆伽师地区的GPS观测资料，对该地区地壳内的应力场变化进行了计算，并分析和讨论了该地区地壳内的局部应力场变化与地震活动和断层构造活动的关系． 

RELATIONSHIP BETWEEN REGIONAL STRESS FIELD VARIATION AND EARTHQUAKE ACTIVITIES FROM GPS DATA

WT5BZ]The relationship between the earth stress field, earth surface displacement field and the gravity variation is deduced. Algorithms based the boundary element method to compute the earth stress variation using the earth surface displacement is discussed. The stress field variation in Jiashi region, Xinjiang, China is obtained from the GPS data observed in 1997 and 1998, respectively, and the relationship among the local stress field variation, seismic activities and fault tectonic activities is discussed.