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使用双差定位法对2016年11月25日阿克陶M_S6.7地震及791个余震进行了重新定位,获得了481个地震的震源位置参数。结果表明:余震沿木吉盆地北缘断裂两侧分布,展布长度约70 km,余震分布的优势方向与木吉盆地北缘断裂的走向基本一致;余震震源深度主要集中分布在2~14km,此次地震的破裂方向可能由深部到浅部破裂。结合震源机制及主震和余震序列的空间分布特征可推断,木吉盆地北缘断裂是阿克陶地震的主要发震构造。
The double-difference method was used to relocate the Aketuo M_S6.7 earthquake and 791 aftershocks on November 25, 2016, and the focal position parameters of 481 earthquakes were obtained. The results show that the aftershocks distribute along both sides of the northern margin of the Muji basin, and the distribution length is about 70 km. The dominant direction of aftershocks is consistent with that of the northern margin of the Muji Basin. The focal depth of aftershocks is mainly concentrated in 2 ~ 14 km. The rupture direction of the earthquake may rupture from deep to shallow. Based on the focal mechanism and the spatial distribution of mainshock and aftershock sequences, it can be concluded that the northern margin of the Muji Basin is the main seismogenic structure of the Aketuo Earthquake.