1879年武都南8级地震新资料的发现与应用

公元1879年7月1日(清光绪五年五月十二日)凌晨,在陇南武都、文县之间发生了8级强震.因震区地质构造复杂、交通不便,缺少历史资料的系统收集和整理,至今仍存在对本次大震认识的模糊之处.笔者近年来利用地缘之便收集了20余条与该次地震相关的碑刻、题记史料.通过比较分析,认为该次地震的宏观震中大约在洋汤河流域的桥头、屯寨(今天池乡),极震区则要延展到四川九寨沟县郭元乡、武都两水镇及石门乡等地.

New Discovery and Application of Some Historical Data for the M8.0 Earthquake in Southern Wudu in 1879

An M8.0 great earthquake occurred between Wudu and Wenxian,Longnan district,on July 1,1879(May 12,Guangxu 5,Qing Dynasty).The complex geological structure,traffic inconvenience,and lack of systematic data and regional field trips have led to speculations and discussions about the true conditions of the earthquake for half a century.However,many questions remain.Comparative analysis of more than 20 studies concerning this earthquake has revealed that the macroscopic epicenter of the earthquake is located in Qiaotou and Tunzhai(now Tianchi township)along the Yangtang River.Moreover,the magistoseismic area extended to Guoyuan Township in Jiuzhaigou County,Sichuan province,and Liangshui and Shimen Township in Wudu,Gansu province.