图2  北部湾构造及M_S≥5.5级历史地震分布图

断裂名称：①北部湾-临高断裂；②北部湾-珠江口外断裂；③防城-灵山断裂；

          ④合浦-北流断裂；⑤右江断裂；⑥四会-吴川断裂；⑦铺前-光村断裂

Fig.2  Map of fault structure around Beibu Gulf and distribution of historical  

       earthquakes with M_S≥5.5