图28  富民５．２级地震前兆异常时间进程示意图

      1.空区及条带；2.频度；3.b值；4.水氡；5.短水准、

      短基线；6.地应力；7.水位；8.地电；9.地磁

Fig.28  Sketch of temporal process of the precursory anomalies

        before the M_S5．2 Fumin earthquake