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80年代末,我国自行研制的TJ-1型钻孔式体应变仪,已取得一批实测资料,其中包括地球的固体潮。观测系统对固体潮的响应与测区岩体的力学性质有关。岩性不同,其响应程度亦不同;岩性改变,响应程度也会改变。当地震孕育到一定阶段后,孕震区的微裂隙出现扩展串通,介质性质发生变化,地球对潮汐力的响应也会发生变化,高精度测量系统记录的固体潮就会发生畸变。通常只在一定范围波动的潮汐振幅因子(即实测应变潮汐振幅与理论潮汐振幅之比),此时便会出现偏离基值的下降型异常变化。二、固体潮调和分析固体潮就是地球固体部分在太阳和月亮引潮力作用下产生的内部应力或应变。对应变固体潮资料作调和分析,是提取地震信息、预报地震的方法之一。
In the late 1980s, a series of measured data of TJ-1 drilling body strain gauge developed by our country, including the solid tide of the earth, have been obtained. The response of the observation system to solid tide is related to the mechanical properties of the rock mass in the area. Different lithology, the response is also different; lithology changes, the response will change. When the earthquake is conceived to a certain stage, the microcracks in the seismogenic zone expand collinearly, the properties of the medium change, and the earth’s response to tidal forces will also change. The solid tide recorded by the high-precision measurement system will be distorted. Usually only in a certain range of tidal amplitude fluctuation factor (that is, the measured strain tidal amplitude and theoretical tidal amplitude ratio), then there will be deviation from the base value of the descending anomalous changes. Second, the tide of solid tide Analysis of solid tide is the solid part of the earth in the sun and the moon tidal force generated by the internal stress or strain. Harmonic analysis of strain tide data is one of the methods to extract seismic information and predict earthquake.