【摘要】 20 0 1年 2月 2 3日四川省发生的 6 .0级地震 ,其宏观震中位于雅江县与康定县之间的高山峡谷地带 .极震区烈度可达 度 , 度区、 度区和 度区面积分别为 1 80 km2 ,1 472 km2 和3 998km2 ,等震线分布总体形态呈椭圆形 ,长轴近南北向 .震区建筑物普遍受损 ,极震区山地灾害较为严重 .初步分析认为 ,此次地震的发生与理塘断裂和玉农希断裂的长期活动有关 ,主干断裂活动造成的地壳应力调整和集中 ,最终在块体内部的次级断裂上释放而产生地震更多还原

【Abstract】 An earthquake of M 6.0 occurred on February 23, 2001 in the western Sichuan Province, China. The macroseismic epicenter situated in the high mountain-narrow valley region between Yajiang and Kangding counties. According to the investigation on the earthquake region, the areas with intensity Ⅷ, Ⅶ and Ⅵ region are 180 km 2, 1 472 km 2 and 3 998 km 2, respectively. The isoseismals are generally in elliptic shape with long axis trending near NS direction. The earthquake destroyed many buildings and produced some phenomena of ground failure in the area with intensity Ⅷ. This event may be resulted from long activities of the Litang fault and Yunongxi fault, two main faults in the western Sichuan. The movement between the main faults made the crust stress adjust and concentrate, and finally a quite large energy are released by the earthquake on the secondary fault in the block.更多还原