【摘要】 给出了兰州台浮子水管倾斜仪和石英伸缩仪１９８７～１９９３年间Ｍ２波潮汐因子的年度调和分析结果，然后对各分量月均值进行了残差分析，并绘出去除长期项后的倾斜矢量图，据此探讨了景泰地震的中期前兆异常和震后效应特征。更多还原

【Abstract】 In this paper,the yearly harmonic analysis results of M2 wave of the data observed with water tube tiltmeter and quartz horizontal extensometer at Lanzhou deformation station during 1987～1993 is given.Then the residuals of the month mean value of all components are analysed and the tilt vector charts removing long-term item are given too.Accordingly,the characters of the medium-term deformation precursor and afterearthquake effect for Jingtai earthquake are studied.更多还原