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2016年11月25日新疆阿克陶发生M_S6.7地震,此次地震前震源附近区域中强地震活动较活跃。本文中选取2015年12月7日塔吉克斯坦和2016年6月26日吉尔吉斯斯坦相继发生的M_S7.4、M_S6.7两次地震,利用USGS得出的震源机制解及深度进行静态库仑应力的计算,分析研究这两次强震对区域地震活动的应力变化影响。同时依据阿克陶M_S6.7地震的震源机制解和深度分析其对周围区域和相应断层的应力触发作用。结果表明:(1)阿克陶M_S6.7地震发生在塔吉克斯坦M_S7.4和吉尔吉斯斯坦M_S6.7两次地震的库仑应力累积变化的增强区;(2)阿克陶M_S6.7地震对西昆仑地震带以及南天山西段柯坪断裂具有应力增加的影响,需加强对这两个区域的关注。
On November 25, 2016, the M_S6.7 earthquake occurred in Aktau, Xinjiang, where moderately strong earthquakes were active before the epicenter. In this paper, two M_S7.4 and M_S6.7 earthquakes that occurred successively in Tajikistan on December 7, 2015 and Kyrgyzstan on June 26, 2016 are selected, and the static Coulomb stress is calculated by using the focal mechanism solution and depth of the USGS , Analyzes the influence of these two strong earthquakes on the stress changes of regional seismicity. At the same time, based on the focal mechanism mechanism and depth analysis of the Aqutuo M_S6.7 earthquake, the stress triggering on the surrounding area and corresponding faults is analyzed. The results show that: (1) the Aqutuo M_S6.7 earthquake occurred in the enhanced area of cumulative Coulomb stress change in both Tajikistan M_S7.4 and Kyrgyzstan M_S6.7 earthquakes; (2) The Kunlun seismic zone and the Keping fault in the western part of the southern Tianshan Mountains have the effect of stress increase. Therefore, more attention should be paid to these two areas.