定量与定性分析在2017年精河MS6.6地震中的应用

为准确提取震前异常信息,以2017年新疆精河M_S6.6地震为例,基于乌鲁木齐台站W-N(k)测段数据,利用离差统计分析方法与原始曲线分析方法分别从定量与定性两个角度研究了地震前后的数据异常特征。结果显示,震前测段数据的变差系数成倍增大,离差分布曲线偏离正态分布,原始曲线出现大幅转折,断层活动形式出现明显变化,震后异常特征消失。通过效果图可知,结合两种方法分析数据异常具有一定的可行性,能为震前异常识别提供参考。

Application of Quantitative and Qualitative Analysis on 2017 Jinghe MS6.6 Earthquake

In order to extract abnormal information before earthquake accurately,this paper took 2017 Jinghe M_S6.6 earthquake in Xinjiang area as a sample and used methods of deviations statistics analysis and original curve analysis to study anomalous characteristics of the data before and after this earthquake from the perspective of quantitative and qualitative analysis based on the cross-fault data of W-N(k)segment of Wulumuqi seismostation.The results show that the deviation coefficients get larger and shapes of deviation distribution curves of this segment deviate from normal distribution obviously,meanwhile,shape of original curve of the segment changes by a large margin and active pattern of the fault near the seismostation reverses apparently before the earthquake,which disappear after the earthquake.The result figures prove that analyzing data anomalies using the two methods is feasible to a certain extent,which also provides a reference for anomalies recognition before earthquake.