中文摘要：

2013年11月吉林省前郭地区连续发生地震,本文利用11月1日到24日前郭地区6个流动地震台站记录的地震波形数据资料,使用剪切波分裂分析方法初步获得了每一个台站的剪切波快波偏振方向和慢波延迟时间,并初步探讨了研究区域地壳应力的分布.快波偏振方向主要为北西向和北东向,但是在整体上北西向的一致性较好,北东向的结果较为零散,反映了研究区域内复杂的应力特征.北西向的各向异性方向与发震断裂的走向垂直,与地震在空间上的展布方向一致.北西向的快剪切波偏振方向与地表运动速度场的方向也是一致的.快波偏振方向的分布与逆冲兼走滑的震源机制解结果基本吻合.慢波延迟时间的结果在0.85∽6.93 ms·km∽（-1）范围内.慨5.3、5.8级地震前后慢波延迟时间的特征性变化反映了地壳应力的积累,以及随着地震发生应力的释放.

英文摘要：

A series of earthquakes happened in November 2013 in Qianguo area, Jilin Province. Using the seismic data recorded by 6 temporary stations from November 1 to 24, with the method of shear-wave splitting, this paper preliminarily determines the polarization directions of fast shear-wave and the time-delays of slow shear-wave, and discusses the distribution of stress in the crust. The polarization direction of fast shear-wave is mainly NW and NE. On the whole, the consistency of NW direction is better, but the results in NE direction are somehow scattered, which suggests the complexity of the stress in the study area. The anisotropic direction of NW which is in agreement with the spatial expanding direction of earthquakes, is vertical to the strike of seismogenic fault. The NW direction of fast shear-wave is the same as the direction of surface velocity field. The polarization direction of fast shear-wave is consistent with the thrust and strike-slip focal mechanism solution. The time-delay of slow shear-wave is in the range of 0.85∽ 6.93 ms/kin. The characteristic changes before and after the MsS. 3, 5.8 earthquake reflect the accumulation of the crustal stress and decrease after the earthquake happening.