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本文搜集、整理了我国几十次大、中强地震震前、震时地倾斜异常图象,大体可归纳为四类: 1.震前记录曲线渐变—回复—发震(远震多见); 2.震前记录曲线突变(阶跃)—发震(近震多见); 3.震前潮汐记录曲线畸变—发震; 4.震前记录曲线脉动(加粗)—发震。 其基本特点为:①异常形态具多样性;②异常出现在震前几分钟到几十小时;③异常量级多数为10~(-8)～10~(-7),少数为10~(-6)。个别为10~(-5);④异常倾向多与地震方位有关;⑤如多台记到同一地震的异常,则有先远后近的现象。 本文还结台实验与地震模式对有关问题作了讨论。
This paper collects and organizes dozens of large and medium-strong earthquakes in our country before and during the epicenter anomalies, which can be generally classified into four categories: 1. Gradient-recovery-seismogram before earthquake (teleseismic common) ; 2. Pre-earthquake record curve mutation (step) - Seismogenic (more common near earthquakes); 3. Pre-earthquake tidal record curve distortion - Seismogram; 4. Pre-earthquake record curve pulsation (bold) - Seismogenic. The basic features are as follows: (1) The abnormal morphology is diversified; (2) The anomalies occur in a few minutes to tens of hours before the earthquake; (3) The abnormal orders are mostly 10 -8 to 10 -7, -6). (5); (4) The anomalous tendency is mostly related to the direction of the earthquake; (5) If more than one record the anomaly of the same earthquake, there is the phenomenon that the anomaly is followed first and then. This article also sets the stage experiment and the earthquake mode to discuss the related question.