图4    丰镇5.8级地震余震深度剖面图(1981.8.13―1981.8.27; M_L ≥1.0)

Fig.4  Profile for depth of aftershocks of the M_S 5.8 Fengzhen  

       earthquake

        (a) 沿纬向深度剖面图；(b) 沿经向深度剖面图