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我国利用水化学组分变化预报地震已有十年实践历史,通过多次强震的检验,说明地下水化学方法是一种可用的中短期预报手段.本文以华北地区三次大地震为重点,试图通过总结我国近期几次七级以上强地震的水化学前兆反映特征,探讨地下水化学在地震预报过程中的作用及前兆变化的主要影响因素,进而对水化学预报地震的前兆机制进行初步讨论.
China has ten years of practical experience in predicting earthquakes by using changes in chemical composition of water, and the test of multiple strong earthquakes shows that the groundwater chemistry method is a useful medium- and short-term forecasting tool.Taking the three large earthquakes in North China as an example, This paper summarizes the characteristics of hydrochemistry precursors reflected by several strong earthquakes above the level of Seventh grade in China, discusses the role of groundwater chemistry in the process of earthquake prediction and the main influencing factors of precursor changes, and then discusses the precursory mechanism of hydrochemical forecasting earthquakes.