图2  宜宾5.4级地震震区附近地质构造及历史地震图

断裂名称：①华蓥山断裂；②孔滩盲冲断裂；③毛桥断裂

Fig.2  Seismogeological tectonic and distribution of historic earthquakes

       around the epicenter of the M_S5.4 Yibin earthquake