天津地区咸水井映震能力评估

系统处理了1992年以来天津地区4口咸水井的水位观测资料，使用R值对这4口井的映震效能进行了评估。认为：①这4口井的R值不高，主要原因是咸水层观测井水位异常时间较长，致使预报占用时间较长；②咸水层观测井水位异常幅度比较明显，异常性质的规律性较强，出现异常时易于识别；③咸水层观测井水位有异常有地震的比率达到了70％以上，这对有震的判定非常有意义。

APPRAISAL OF CORRESPONDING EARTHQUAKE ABILITY ABOUT SALTY WATER WELL IN TIANJIN AREA

I have processed the observation data of water level about 4 salty water wells since 1992. And I used the R value to make appraisal of corresponding earthquake efficiency for these 4 salty water wells. I thought that ： ① The R values of these 4 wells are not high. The main reason is that the abnormity time of observation wells in salty water layer is too long. It made the prediction to take long time ; ② The abnormity amplitude of water level in salty water layer is obvious. The regularity of the abnormity character is strong. When there appears abnormity, it is easy to distinguish; ③ The proportion of having abnormity and having earthquakes of water levels of observation wells in salty water layer is more than 70%. It is very meaning to judge earthquake occurrence.