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2008年3月21日和2014年2月12日在新疆和田地区于田县先后发生两次Ms7.3地震,两次地震震中相距110 km.根据大震现场考察的结果,两次地震的宏观异常表现有较大差异.本文从发震构造、震源深度和震源机制的角度,结合发震时间和空间分布等,分析了两次于田地震宏观异常异同点的可能原因,初步总结了新疆地区地震宏观异常的空间分布特征、物理特征和时间特征,并结合哈萨克斯坦地震生物观测的研究现状,对我国现阶段的地震宏观观测给出一些建议性意见.
Two Ms7.3 earthquakes occurred in succession on March 21, 2008 and February 12, 2014 in Yutian County, Hotan region of Xinjiang. The epicenter distances between the two epochs were 110 km. According to the results of on-site investigation, the macroscopic phases of the two earthquakes This paper analyzes the possible reasons for the similarities and differences of macroscopic anomalies between the two earthquakes in Yutian from the perspectives of seismogenic structures, focal depth and focal mechanism, combined with the time and spatial distribution of earthquakes, According to the research status of earthquake observation in Kazakhstan, this paper gives some suggestions on the macro-observation of the current earthquake in China.