江苏及邻区现代应力场空间分布特征分析

Preliminary Analysis for the Space Distribution of Present Stress Field in Jiangsu and its Adjacent Area

利用１９８０年１月至１９９１年２月间江苏及邻区天然地震的Ｐ波初动符号，按不同深度分层计算平均节面解，分析江苏及邻区现代应力场空间分布特征。结果表明，应力场主压应力方向为ＮＥＥ—ＳＷＷ方向，主张应力为ＮＮＷ—ＳＳＥ方向。在不同深度上表现出中、深部层应力方向较一致。

Based on the P-wave first motion record of earthquakes during the period from 1980 to 1991 in Jiangsu-Shandong-Anhui-Zhejiang region, we compute the composite nodal plane solutions of the different depth and study the feature of the present stress field in Jiangsu and its adjacent area. The direction of compressive principal stress is in NEE and the tensil stress is in NNW. The stress of the crustal median layer is roughly the same direction as the deep layer.