图16  包头西窗口地震活动（40～41°N，109～110°E）（M_L≥1.8）与阴山地震带中强地震对应图

Fig.16  M-t & N-t for west Baotou seismic window and their correlation

        with M_S≥5.0 earthquakes in the Yinshan seismic zone