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我国首先把数百米长的跨断层的短水准测量作为地震前兆的观测项目之一.由于用它来监视某些活动性断层的活动情况可以提取地震信息,尤其是它记录某些大震前兆信息效果较好,所以,短水准观测已经引起日本等许多发达国家的重视.为达预测预报地震之目的,从水准观测的角度出发,一是不断采用新技术,改进观测仪器和操作规程,如地形变测量希望把国家一等水准网的观测精度提高一个数量级,这样才能满足当前对强震前兆所产生的位移量的一般估计.二是利用地壳形变的不连续性,地壳形变大量集中在构造线附近,应把短水准线路选择在适宜的
In our country, firstly, a few hundred meters of short-span cross-fault short leveling is used as one of the observation items of earthquake precursors, and since it can be used to monitor the activity of some active faults, seismic information can be extracted. In particular, it records some major earthquake precursors Therefore, the short-range observation has attracted the attention of many developed countries such as Japan etc. In order to achieve the purpose of predicting and forecasting earthquakes, from the point of view of the standard observation, the first is to continuously adopt new technologies and improve the observation instruments and operating procedures, such as Geodetic surveying hopes to improve the observational accuracy of the national first-class leveling network by an order of magnitude in order to meet the current general estimate of the displacements produced by the precursors of the strong earthquakes. Second, by using the discontinuity of crustal deformation, crustal deformation is heavily concentrated in the tectonics Near the line, short lines should be selected in the appropriate