图14  溧阳6.0级地震前的b值变化

Fig.14  Variation of b-value before the M6.0 Liyang earthquake

       (a)   扬－铜带b值曲线(1953－1978，M_S≥3.0);

       (b) 扬－铜带递推累加b值及b值曲线外延(M_S≥3.0);

       (c) 苏南地区滑动b值曲线(M_S≥2)