2003年2月24日伽师-巴楚6.8级地震前后地震活动与地震破裂特征  

The characteristics of seismic rupture and seismically activity before and after Jiashi-Bachu M_S 6.8 earthquake in 24 Feb. 2003

作　　者：杨成荣[1] 王小平[2] 

机构地区：[1]新疆维吾尔自治区地震局,中国乌鲁木齐830011 [2]天津市地震局,中国天津300201

出　　处：《地震地磁观测与研究》2005年第5期52-55,共4页Seismological and Geomagnetic Observation and Research

摘　　要：利用新疆地震目录研究伽师-巴楚6.8级地震前后,该震区附近地震活动情况,并结合其强震震源机制解,2003年1月4日5.4级、5月4日5.8级和2月24日6.8级地震宏观地震烈度,对该区域应力场和破裂方向特征进行探讨。结果表明,这次6.8级地震主压应力轴为NNW-SSE向,破裂方向为SSE向,与1997～1998年伽师强震群的区域应力场主压应力为NNE-SSW向、破裂方向为NNE向完全不同。We have discussed the stress field and rupture direction characteristics of the Jiashi-Bachu Ms 6.8 earthquake, by use of catalog to research the seismic activities, and combine the large earthquake focal mechanism solutions and seismic intensity of Ms 5.4 earthquake in 4 Jan., 2003, Ms 5.8 earthquake in 4 May, 2003 and Ms 6.8 earthquake in 24 Feb., 2003. The results indicate that the main compressive stress axis is NNW-SSE direction, the rupture direction is SSE direction. It is different from the result main compressive stress field is NNE-SSW of Jiashi large earthquake swarms in 1997-1998, its direction, seismic rupture is NNE direction.

关 键 词：伽师-巴楚地震 地震活动 地震烈度 地震破裂 

分 类 号：P315.5[天文地球—地震学]