辽宁地区震源机制解及应力场特征的研究

收集整理了前人所做的辽宁地区震源机制解结果，又利用近震Ｐ波初动资料，求行了本区１３个较大地震的断层面解，并在此基础上，对区域应力场特征进行了研究。通过对本区２３个（３．５≤Ｍ≤７．５）地震震源机制解资料的统计，其结果表明，本区构造应力场主压应力轴（Ｐ）集中于ＮＥＥ向，主张应力轴（Ｔ）为ＮＮＷ向，断层面所受的力以水平分量占优势，Ｎ轴仰角大多较陡，其断层活动以走滑借动为主。

SIUDY OF FOCAL MECHANISM SOLUTIONS AND STRESS FIELD CHARACTERSTICS IN LIAONING REGION

Based on focal mechanism solutions done before in Liaoning region, and by using of the P wave onset data, the fault plane solutions of 13 stronger carthquakes in this region are obtained. After that the stress field characteristic are studied. The result of 23 earthquakes (3.5) statistics shows that the principal compressional stress axles P is concentrated in the NEE direction while the tensile axies T in the NNE direction; the null axies N are mostly rather steep; the fault activities appear to be of strike-slip.