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加卸载响应比理论是描述震源区介质损伤程度的一种地震预测方法。基于加卸载响应比理论,对2016年11月25日阿克陶M_S6.7地震前加卸载响应比时空演化特征和异常区的孕震积分时程曲线进行分析。结果表明,本次地震前,研究区出现了多个加卸载响应比高值区域,异常区呈现为环状或片状,随着地震孕育过程,异常区往震源附近迁移,发震地点在异常区边缘和内部,地震发生在异常高值减弱过程中,异常峰值到发震时间为1个月,远小于理论发震时间,这表明了研究区构造活动剧烈,孕震周期短的特征。
The loading-unloading response ratio theory is an earthquake prediction method that describes the degree of media damage in the source region. Based on the theory of loading-unloading response ratio, the time-space evolution characteristics of loading-unloading response ratio and the seismogram integral time-history curve of anomalous zone before the A-Ketta M_S6.7 earthquake on November 25, 2016 are analyzed. The results show that before the earthquake, there appeared a number of regions with high loading and unloading response ratios in the study area, and the anomaly areas appeared as rings or sheets. With the gestation process, the anomalous areas migrated to the vicinity of the seismic source, In the process of earthquake occurrence, the anomalous high value is weakened, and the anomaly peak to the onset time is 1 month, far less than the theoretical occurrence time. This shows the tectonic activity is intense and the period of seismogenic shock is short in the study area.