| 利用InSAR技术研究2018年西藏谢通门MW5.6地震发震构造 |
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| 引用本文： | 王金烁,赵宁远.利用InSAR技术研究2018年西藏谢通门MW5.6地震发震构造[J].西北地震学报,2020,42(2):384-390. |
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| 作者姓名： | 王金烁 赵宁远 |
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| 作者单位： | 中国地震局第二监测中心, 陕西 西安 710054 |
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| 基金项目： | 国家自然科学基金重大项目（41590860） |
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| 摘 要： | 2018年12月24日在西藏日喀则市谢通门县发生MW5.6地震。利用Sentinel-1A卫星数据和D-InSAR技术,获得该地震LOS方向的同震形变场图像,并以此为约束反演地震断层的几何参数和同震滑动分布特征。反演结果表明,谢通门MW5.6地震发震断层近南北走向,断面倾向西,倾角约35°,破裂长度约12 km,同震滑动主要集中在4~11 km深度范围内,以正断倾滑为主,最大滑动量0.18 m,矩震级MW5.6。2018年谢通门地震发震构造是谢通门—申扎伸展断裂系中的一条新生盲断层。
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| 关 键 词： | 谢通门MW5.6地震 INSAR 同震形变 发震构造 正断层 |
| 收稿时间： | 2019/5/8 0:00:00 |
Seismogenic Structure of 2018 Xietongmen, Tibet MW5.6Earthquake Inferred from InSAR Data |
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| WANG Jinshuo,ZHAO Ningyuan.Seismogenic Structure of 2018 Xietongmen, Tibet MW5.6Earthquake Inferred from InSAR Data[J].Northwestern Seismological Journal,2020,42(2):384-390. |
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| Authors: | WANG Jinshuo ZHAO Ningyuan |
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| Institution: | The Second Monitoring and Application Center, China Earthquake Administration, Xi''an 710054, Shaanxi, China |
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| Abstract: | On December 24,2018,a MW5.6 earthquake occurred in Xietongmen County,Shigatse City,Tibet.This study utilizes Sentinel-1A satellite SAR data and D-InSAR technology to obtain an image of the co-seismic deformation field in the LOS direction and then inverses the geometric parameters and co-seismic slip distribution of the seismological fault of the event.The results show that the fault associated with the MW5.6 earthquake lies in a near NS-direction,has a dip angle of 35°,and a rupture length of 12 km.The co-seismic slip is mainly concentrated in a range of 4-11 km,the maximum slip is 0.18 m,and the moment magnitude is MW5.6.In addition,it is determined that the seismogenic fault of the Xietongmen earthquake in 2018 is a new blind fault belonging to the Xietongmen—Shenzha extensional fault system. |
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| Keywords: | Xietongmen MW5 6 earthquake InSAR co-seismic deformation seismogenic structure normal fault |
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