两条历史记载的启迪对震前予位移机理和预警时间的探讨

Discussion on the Pre-earthquake Displacement Mechanism and Earthquake Early Warning Time Based on Inspiration of the Two Historical Records

研究了两条历史地震的记载,因为这两条记载对地震预测,尤其是地震预警有着进一步探索的启发意义。一条是历史大地震的一个特有现象——震前产生的地面旋转,文中以这个记载为启迪,对它物理机制进行了分析以,对其是否可作为前兆指示作了探讨。另外一个历史地震记载是地震前的大动与小动之间时间的记载,该记载为我们在大地震发生时在近场进行预警提供了一个启迪,因为在近场中,从震源发出的P波与S波是没有被分开的,这时没有两个波到达的时间差,文中对这个问题进行了初步的探讨,以期作为极震区预警时间确定时提供参考。

In this paper, two historical earthquakes are studied, because these two records have implications for further exploration of earthquake prediction, especially earthquake warning. One is a unique phenomenon of the historical earthquake-the rotation of the ground produced before the earthquake, according to the record, the paper analyzed its physical mechanism, and discussed whether it can be used as a precursor to the instructions.Another historical earthquake record is the time record between the major movement and the small movement before the earthquake, the record of the earthquake in the near field provides an early warning, because in thenear field, from the source the P wave and S wave are not separated, then there is no time difference between the arrival of two waves, the paper does a preliminary discussion, and expects to provide reference for the determination of early warning time in earthquake zones