| 2001年昆仑山口西8.1级地震同震形变场特征的初步分析a |
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| 引用本文： | 单新建,柳稼航,马超.2001年昆仑山口西8.1级地震同震形变场特征的初步分析a[J].地震学报,2004,26(5):474-480. |
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| 作者姓名： | 单新建 柳稼航 马超 |
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| 作者单位： | 1) 中国北京100029中国地震局地质研究所地震动力学国家重点实验室
2) 中国太原030024太原理工大学 |
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| 基金项目： | 科技部社会公益研究项目，地震科学联合基金 |
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| 摘 要： | 利用差分干涉雷达测量技术获取的宏观震中区的同震形变场，结合对地震活动性、震源机制、野外考察等资料分析，对昆仑山口西8.1级地震同震形变场特征进行了研究. 结果表明:宏观震中位于库赛湖东北侧，宏观震中区发震断层可分为两个形变中心区域，其中西段长约42 km，东段长约48 km，整个发震断层主破裂段长90 km；由干涉形变条纹分布格局可清楚地判断出发震断层的左旋走滑特征；断层两盘变形特征不同，南盘变形程度明显大于北盘；宏观震中附近最大斜距向位移量为288.4 cm，最小斜距向位移量为224.0 cm，宏观震中发震断层最大左旋水平位错为738.1 cm，最小地面左旋水平位错为551.8 cm.
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| 关 键 词： | 合成孔径雷达干涉技术& 昆仑山口西8.1级地震& 同震形变场 |
| 文章编号： | 0253-3782(2004)05-0474-07 |
| 修稿时间： | 2003年3月17日 |
PRELIMINARY ANALYSIS ON CHARACTERISTICS OF COSEISMIC DEFORMATION ASSOCIATED WITH MS=8.1 WESTERN KUNLUNSHAN PASS EARTHQUAKE IN 2001 |
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| Shan Xinjian Liu Jiahang Ma Chao State Key Laboratory of Earthquake Dynamics,China Earthquake Administration,Beijing ,China Taiyuan University of Technology,Taiyuan ,China.PRELIMINARY ANALYSIS ON CHARACTERISTICS OF COSEISMIC DEFORMATION ASSOCIATED WITH MS=8.1 WESTERN KUNLUNSHAN PASS EARTHQUAKE IN 2001[J].Acta Seismologica Sinica,2004,26(5):474-480. |
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| Authors: | Shan Xinjian Liu Jiahang Ma Chao State Key Laboratory of Earthquake Dynamics China Earthquake Administration Beijing China Taiyuan University of Technology Taiyuan China |
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| Affiliation: | Shan Xinjian 1) Liu Jiahang 1) Ma Chao 2) 1) State Key Laboratory of Earthquake Dynamics,China Earthquake Administration,Beijing 100029,China 2) Taiyuan University of Technology,Taiyuan 030024,China |
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| Abstract: | Based on the analysis of coseismic deformation in the macroscopic epicentral region extracted by Differential Interferometric Synthetic Aperture Radar (D-InSAR), and combined with the seismic activity, focal mechanism solutions of the earthquake and field investigation, the characteristic of coseismic deformation of M S=8.1 western Kunlunshan Pass earthquake in 2001 was researched. The study shows that its epicenter lies in the northeast side of Hoh Sai Hu; and the seismogenic fault in the macroscopic epicentral region can be divided into two central deformation fields: the west and east segments with the lengths of 42 km and 48 km, respectively. The whole fault extends about 90 km. From the distribution of interferometry fringes, the characteristic of sinistral strike slip of seismogenic fault can be identified clearly. The deformations on both sides of the fault are different with an obviously higher value on the south side. In the vicinity of macroscopic epicenter, the maximum displacement in look direction is about 288.4 cm and the minimum is 224.0 cm; the maximum sinistral horizontal dislocation of seismogenic fault near the macroscopic epicenter is 738.1 cm and the minimum is 551.8 cm. |
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| Keywords: | InSAR M S=8 1 western Kunlunshan Pass earthquake coseismic deformation |
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