图12  龙南附近地区地震震中分布图^[7]

      (1973.7―1981.6; M_L ≥2.0)

Fig.12  Epicentral distribution of earthquakes around the Longnan area

        1. M_L =2.0―2.9；2. M_L =3.0―3.9；3. 4.0―4.9；

        4. M_L =5.0―5.9；5. 等震线；6. 断裂