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1980年12月16日,新疆青河县南发生了5.8级地震,富蕴台距震中120公里,倾斜仪记录资料反映了这次地震的中期趋势异常现象。文中分别给出了采用形态法、差分法、倾斜矢量模分析、回归分析、时序迭加法分析处理资料的结果。青河南5.8级地震前,地倾斜中期趋势异常开始出现的时间在震前1年,量级为10~(-5)。 地倾斜的变化是可以反映强震前的趋势异常的,文中方法判定此类异常直观明了,效果较好。
On December 16, 1980, a 5.8-magnitude earthquake occurred in the south of Qinghe County, Xinjiang, and Fuyun Terrace was 120 kilometers away from the epicenter. The recorded data of the inclinometer reflected the anomalous mid-term trend of the earthquake. The paper gives the results of morphological analysis, difference method, inclined vector mode analysis, regression analysis and time series superposition method respectively. Before the Qinghai-Hebei earthquake of magnitude 5.8, the mid-term trend of geostrophic anomalies began to occur 1 year before the earthquake with a magnitude of 10-5. The change of ground inclination can reflect the anomalous tendency before the strong earthquakes. The method of this article determines that such anomalies are intuitive and obvious and the effect is better.