地震前地下水位的短期及临震变化异常
THE SHORT-TERM VARIATION OF THE GROUND WATER LEVEL BEFORE EARTHQUAKES
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摘要: 本文广泛收集了我国54次地震前地下水位变化的观测资料,对地下水位短期和临震的变化形态、时间空间特征进行了叙述和分析。着重说明事实和寻找可能有的规律,指出: 1)地下水位下降异常是一种最普遍的震前现象; 2)异常的空间展布是不均一的,形态是多样的,而不是如苏联学者所认为的那样是均匀的,形态单一的。异常特征与井孔本身所处的局部构造有关。Abstract: The present author has collected from various sources the observed data of variations of ground water level before 54 earthquakes occurred in China for making a relatively systematic description and analysis, on the forms of the short term ground water level variations and their time-space distribution. Emphasis is laid on the facts observed from which empirical relations may be possibly found.It is pointed out that:(1) The anomalous lowering of the ground water level before earthquakes is the most common anomalous phenomenon (2) The spatial distribution of the anomalous variations of the ground water level is not the same everywhere, their forms are various-They can be generally observed but depend on the local geological structures, while the Soviet scientists believe the opposite.