| 汶川8.0级地震序列重新定位及其发震构造初探 |
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| 引用本文： | 吕坚,苏金蓉,靳玉科,龙锋,杨雅琼,张致伟,汤兰荣,李超. 汶川8.0级地震序列重新定位及其发震构造初探[J]. 地震地质, 2008, 30(4): 917-925. DOI: CNKI:SUN:DZDZ.0.2008-04-010 |
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| 作者姓名： | 吕坚 苏金蓉 靳玉科 龙锋 杨雅琼 张致伟 汤兰荣 李超 |
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| 作者单位： | 江西省地震局,南昌,330039;四川省地震局,成都,610041;山西省地震局,太原,030021;河北省地震局,石家庄,050021 |
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| 基金项目： | “十一五”国家科技支撑计划项目(2006BAC01B020102);地震科学联合基金(A07124)共同资助 |
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| 摘 要： | 采用双差定位方法对汶川8.0级地震及其2,216次余震进行了重新定位,得到2,061次地震的震源位置,定位结果在水平向和垂直向的估算误差大致为1～2km和2～3km。8.0级主震的震中位置大致为北纬31.00°,东经103.38°,震源深度13km左右,发震构造为龙门山中央断裂。余震震中沿走向分布的总长度为330km左右,震源深度优势分布在3～20km,表现出明显的分段活动特征。南段以龙门山中央断裂活动为主,后山断裂和前山断裂也有地震发生,这3条断裂自西向东倾角似乎逐渐变缓,形成叠瓦状的破裂分布。北段龙门山中央断裂、平武-青川断裂等多条断裂参与了发震过程,地震破裂既有逆冲推覆,也有右旋走滑方式
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| 关 键 词： | 汶川地震 盖格定位方法 双差定位方法 发震构造 |
| 收稿时间： | 2008-12-18 |
DISCUSSION ON RELOCATION AND SEISMO-TECTONICS OF THE MS 8.0 WENCHUAN EARTHQUAKE SEQUENCES |
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| L Jian,SU Jin-rong,JIN Yu-ke,LONG Feng,YANG Ya-qiong,ZHANG Zhi-wei,TANG Lan-rong,LI Chao. DISCUSSION ON RELOCATION AND SEISMO-TECTONICS OF THE MS 8.0 WENCHUAN EARTHQUAKE SEQUENCES[J]. Seismology and Geology, 2008, 30(4): 917-925. DOI: CNKI:SUN:DZDZ.0.2008-04-010 |
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| Authors: | L Jian SU Jin-rong JIN Yu-ke LONG Feng YANG Ya-qiong ZHANG Zhi-wei TANG Lan-rong LI Chao |
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| Affiliation: | L(U) Jian,SU Jin-rong,JIN Yu-ke,LONG Feng,YANG Ya-qiong,ZHANG Zhi-wei,TANG Lan-rong,LI Chao |
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| Abstract: | The MS 8.0 Wenchuan earthquake and its 2216 aftershocks were relocated using the double difference algorithm.The horizontal and vertical errors of the 2061 relocated hypocenters are approximately 1～2km and 2～3km,respectively.The epicenter of main shock is approximately 31.00°N,103.38°E,the focal depth is about 13km and the seismogenic structure is the central fault of Longmenshan Fault zone.The total length of spatial distribution of aftershocks along the strike of the fault is about 330km and the predomina |
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| Keywords: | Wenchuan earthquake Geiger algorithm double difference algorithm seismo-tectonics |
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