阳江地区地震双差定位及其活动图像分析  

Analysis on High-Resolution Hypocenter Location and Activity Image of Yangjiang Earthquake Sequences

作　　者：康英[1] 杨选[1] 黄文辉[1] 陈杏[1] 陈贵美[1] 林伟[1] 吴华灯[1] 

机构地区：[1]广东省地震局,广州先烈中路81号510070

出　　处：《中国地震》2007年第3期295-302,共8页Earthquake Research in China

基　　金：广东省科技计划项目重点项目(2005B32601003)资助

摘　　要：使用双差地震定位法对广东阳江地区1970-2005年的483次地震进行了绝对定位和相对定位,最终得到400次地震的相对定位结果,由此得到的地震活动图像从离散网格状变得较为集中。阳江地震序列在阳江地区呈现出NW和NE走向的共轭分布,以NE向为主,倾角约30°,倾向NE,长约30km;以NW向为辅,倾角约30°,倾向SE,长约20km;震源埋深5-15km。而在附近的恩平地区地震序列则呈NW向分布。文中还讨论了阳江地震序列震源分布和地质构造的关系。The 400 earthquakes in Yangjiang, Guangdong Province, are determined by using the method of double-difference earthquake location. Earthquake chart became concentrated from discrete grids. The rupture characteristics showed that earthquake activity image appeared to be conjugated distribution of NW and NE. The main distribution is NE-trending, NE-dipping at an angle of 30°, and 30km in length. The secondary distribution is NW-trending, SE-dipping at an angle of 30°, and 20km in length. The depth is 5～15km. The Enping earthquake sequences which is not far from Yangjiang in NW-trending. The relationship between earthquake location image, geological structure are discussed.

关 键 词：双差地震定位法 定位图像 破裂特征 阳江地震序列 

分 类 号：P315[天文地球—地震学]