玛多M_(S)7.4地震十堰形变仪器同震响应分析

COSEMIC EFFECT ANALYSIS OF SHIYAN DEFORMATION INSTRUMENT IN MADUO M_(S)7.4 EARTHQUAKE

通过对十堰市地震台柳林沟测点观测数据整理和分析,发现各观测仪器分钟值曲线均记录到青海省果洛州玛多县M_(S)7.4地震清晰的同震响应和震后效应,结果表明:十堰柳林沟测点各形变观测仪器对中远场地震具备较好的记录能力,柳林沟形变观测点具备优良的监测环境;通过观测形变仪器同震变化指示方向和变化幅度,可以为判断发震断层属性、识别隐伏断层提供帮助,分析研究结果有助于了解中远场地震发生时地壳介质应力—应变场响应过程。

Through sorting and analyzing the observation data of Liulingou observation point of Shiyan seismic station,it is found that the minute value curve of each observation instrument records the clear coseismic response and post earthquake effect of Maduo M_(S)7.4 earthquake,Goluo Prefecture,Qinghai Province.The results showed that the deformation observation instruments at Liulingou observation point of Shiyan had good recording ability for medium and far field earthquakes,and Liulingou deformation observation point had excellent monitoring environment;Observing the direction and amplitude of coseismic change indicated by deformation instruments can help to judge the attributes of seismogenic faults and identify hidden faults.The analysis and research results are helpful to understand the stress-strain field response process of crustal media during medium and far-field earthquakes.