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对2016年1月21日门源M_S6.4地震后7处祁连山断裂带跨断层水准观测场地进行了异常核实和加密复测,综合场地环境背景、地震前后观测曲线以及利用最小二乘配置拟合指标,排除场地异常人为等干扰,分析了震后观测资料变化。结果显示:祁连山断裂带中东段、门源震区附近的九条岭、南营、乌鞘岭、河西堡、芨岭东、石灰窑口、扁都口7处场地异常基本可靠,与门源地震发生或构造活动存在一定关联,同震形变不明显。
The anomalous verification and encrypted retest of seven cross-fault leveling stations in the Qilian Mountains fault zone after the Moyuan MS_S6.4 earthquake on January 21, 2016 were conducted. The environmental background of the site, the observed curves before and after the earthquake and the fitting using the least squares Indicators, excluding site anomalous man-made interference, analysis of changes in observed data after the earthquake. The results show that the anomalies in Jiulian, Nanying, Wushaoling, Hexibao, Chongling East, lime kiln and Pingdukou near the middle and east Qilian Mountains fault zone are basically reliable. There is a certain correlation between the occurrence of earthquake and tectonic activity, and the coseismic deformation is not obvious.