Since 1976, by using the non-damping horizontal pendulum tiltmeter at the range of 1.7"-5" period. we have recorded one wave anomaly signal before a series of strong earthquakes respectively. And by means of it we Predicted some strong earthquakes, such as Song pan earth quake (8.16.1976, Ms=7.2) and Yanyuan earthquake (11.7.1976, Ms=6.9). The practice of seismic prediction has proved that the wave anomaly is a possible earthquake precursor. This paper is a conclusion of our detection during 1976-1982, and a preliminary discussion on the genetic mechanism of the wave anomaly.
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程式,许崇熔.一种有苗头的临震前兆——对水平摆地倾仪波动异常的探索[J].地震工程学报,1984,6(2):28-34. Cheng Shi, Xu Chongrong. A POSSIBLE EARTHQUAKE PRECURSOR-the wave anomaly detected by horizontal pendulum tiltmeter[J]. China Earthquake Engineering Journal,1984,6(2):28-34.
