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1976年唐山7.8级地震和宁河6.9级地震前,天津地区的塘沽、青光地震台的水平摆倾斜仪记录到一些临震脉动波异常,本文简要介绍这种异常的特征,并提出水平摆倾斜仪的改进意见。
Before the Tangshan earthquake of magnitude 7.8 in 1976 and Ninghe earthquake of magnitude 6.9 in 1976, the horizontal tilt inclinometers of Tanggu and Qingguang Seismic stations in Tianjin recorded some unusual pulsation waves of the epicenter. This paper briefly introduced the characteristics of such anomalies and proposed a horizontal pendulum Inclinometer improvements.