北京大学地球与空间科学学院,北京,100871
王悦翔,博士生,研究方向为雷达影像大地测量。wangyx418@pku.edu.cn
王腾,博士,助理教授。wang.teng@pku.edu.cn
收稿:2024-11-29,
纸质出版:2025-08-05
移动端阅览
王悦翔,王腾.InSAR观测的2024年阿里地区日土县Mw 5.6地震同震模型及其在地形塑造中的作用[J].武汉大学学报(信息科学版),2025,50(8):1631-1638.
WANG Yuexiang,WANG Teng.InSAR-Derived Coseismic Slip Model of the 2024 Ali Mw 5.6 Earthquake and Its Role on Landscape Evolution[J].Geomatics and Information Science of Wuhan University,2025,50(8):1631-1638.
王悦翔,王腾.InSAR观测的2024年阿里地区日土县Mw 5.6地震同震模型及其在地形塑造中的作用[J].武汉大学学报(信息科学版),2025,50(8):1631-1638. DOI:10.13203/j.whugis20240453
WANG Yuexiang,WANG Teng.InSAR-Derived Coseismic Slip Model of the 2024 Ali Mw 5.6 Earthquake and Its Role on Landscape Evolution[J].Geomatics and Information Science of Wuhan University,2025,50(8):1631-1638. DOI:10.13203/j.whugis20240453
2024-04-13阿里地区日土县Mw 5.6地震发生于青藏高原中西部的羌塘板块内部的鲁玛江冬错断裂附近,经测定其发震震中(81.884°E,33.585°N)位于当地一座海拔5 500 m左右的无名山峰附近。利用Sentinel-1合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)数据量测了地震造成的同震地表形变场,联合使用非线性以及线性反演的方式确定了震源位置、几何参数,以及有限断层滑移模型。反演结果显示,这一次地震的发震断层走向约为336°,向东倾约66°,滑移分布矩心位置海拔超过5 435 m,是青藏高原内部近20年以来InSAR研究过的正断层地震中海拔最高的。通过滑移分布模拟的地表形变与当地地形的对比,发现这一处地震同震形变中的沉降集中在当地峰顶位置,呈现平整地貌的特征(即减小地形梯度),在一定程度上限制了山脉以及青藏高原继续隆起的趋势。这一次地震对于帮助人们认识正断层地震在高原地貌演化中的作用具有一定意义。
Objectives
2
This study aims to investigate the landscape evolution effects of the 2024 Mw 5.6 earthquake that occurred in Ritu County
Ali region
on the Tibetan Plateau using interferometric synthetic aperture radar (InSAR) observations. The research seeks to explore the geodynamic processes and the role of normal faulting earthquakes in the topographic development of the Tibetan Plateau.
Methods
2
We utilized Sentinel-1 synthetic aperture radar data to capture the coseismic deformation field. Nonlinear and linear inversion methods were applied to determine the source location
geometric parameters
and finite fault slip distribution. The Okada model was used to calculate the three-dimensional coseismic deformation field
which was then compared with the local topography.
Results
2
The inversion results revealed that the Ritu earthquake had a strike of 336°
a dip of 66° to the east
and a predominantly normal slip component with a minor right-lateral component. The centroid of the slip distribution was located at an altitude of over 5 435 m
making it the highest-altitude normal faulting earthquake recorded by InSAR in the Tibetan Plateau interior over the past 20 years. The comparison between the coseismic deformation field and the local topography indicated that the subsidence was concentrated at the summit
flatten local topography by reducing the gradient
thereby limiting the continuous uplift of the Tibetan Plateau.
Conclusions
2
The study concludes that the 2024 Ali earthquake
with its high epicentral elevation
played a significant role in restraining the further uplift of the Tibetan Plateau. The findings
to some extent
support the gravitational collapse theory of normal faulting earthquakes within the plateau and provide insights into the intrinsic mechanisms that prevent the Tibetan Plateau from continually uplifting. This research highlights the importance of high-altitude normal faulting earthquakes in shaping the landscape of the Tibetan Plateau.
MOLNAR P , TAPPONNIER P . Cenozoic Tectonics of Asia: Effects of a Continental Collision: Features of Recent Continental Tectonics in Asia Can Be Interpreted as Results of the India-Eurasia Collision [J]. Science , 1975 , 189 ( 4201 ): 419 - 426 .
TAPPONNIER P , XU Z Q , ROGER F , et al . Oblique Stepwise Rise and Growth of the Tibet Plateau [J]. Science , 2001 , 294 ( 5547 ): 1671 - 1677 .
ZHANG P Z , SHEN Z K , WANG M , et al . Continuous Deformation of the Tibetan Plateau from Global Positioning System Data [J]. Geology , 2004 , 32 ( 9 ): 809 .
LI K , TAPPONNIER P , XU X W , et al . Holocene Slip Rate Along the Beng Co Fault and Dextral Strike-Slip Extrusion of Central Eastern Tibet [J]. Tectonics , 2022 , 41 ( 8 ): e2022TC007230 .
ARMIJO R , TAPPONNIER P , HAN T L . Late Cenozoic Right-Lateral Strike-Slip Faulting in Southern Tibet [J]. Journal of Geophysical Research: Solid Earth , 1989 , 94 ( B3 ): 2787 - 2838 .
TAYLOR M , YIN A , RYERSON F J , et al . Conjugate Strike-Slip Faulting Along the Bangong-Nujiang Suture Zone Accommodates Coeval East-West Extension and North-South Shortening in the Interior of the Tibetan Plateau [J]. Tectonics , 2003 , 22 ( 4 ): 1044 .
MOLNAR P , TAPPONNIER P . Active Tectonics of Tibet [J]. Journal of Geophysical Research: Solid Earth , 1978 , 83 ( B11 ): 5361 - 5375 .
GE W P , MOLNAR P , SHEN Z K , et al . Present-Day Crustal Thinning in the Southern and Northern Tibetan Plateau Revealed by GPS Measurements [J]. Geophysical Research Letters , 2015 , 42 ( 13 ): 5227 - 5235 .
HE P , WEN Y M , DING K H , et al . Normal Faulting in the 2020 Mw 6.2 Yutian Event: Implications for Ongoing E–W Thinning in Northern Tibet [J]. Remote Sensing , 2020 , 12 ( 18 ): 3012 .
YANG J Y , XU C J , WEN Y M , et al . The July 2020 Mw 6.3 Nima Earthquake, Central Tibet: A Shallow Normal-Faulting Event Rupturing in a Stepover Zone [J]. Seismological Research Letters , 2022 , 93 ( 1 ): 45 - 55 .
冯万鹏 , 何骁慧 , 张逸鹏 , 等 . 2022年青海门源Mw 6.6地震的发震断层及孕震构造模式 [J]. 科学通报 , 2023 , 68 ( 2-3 ): 254 - 270 .
FENG Wanpeng , HE Xiaohui , ZHANG Yipeng , et al . Seismic Faults of the 2022 Mw 6.6 Menyuan, Qinghai Earthquake and Their Implication for the Regional Seismogenic Structures [J]. Chinese Science Bulletin , 2023 , 68 ( 2-3 ): 254 - 270 .
路珍 , 王丽凤 , 黄伟亮 , 等 . 2022年门源Ms 6.9地震的同震滑动分布: 联合InSAR、GPS和地表位错的贝叶斯建模 [J]. 地球物理学报 , 2024 , 67 ( 5 ): 1781 - 1796 .
LU Zhen , WANG Lifeng , HUANG Weiliang , et al . Coseismic Slip Distribution of the 2022 Menyuan Ms 6.9: Bayesian Modeling Based on Joint InSAR, GPS and Surface Dislocation Observations [J]. Chinese Journal of Geophysics , 2024 , 67 ( 5 ): 1781 - 1796 .
LI K , LI Y S , TAPPONNIER P , et al . Joint InSAR and Field Constraints on Faulting During the Mw 6.4, July 23, 2020 , Nima/Rongma Earthquake in Central Tibet[J]. Journal of Geophysical Research: Solid Earth , 2021 , 126 ( 9 ): e2021JB022212 .
ELLIOTT J R , WALTERS R J , ENGLAND P C , et al . Extension on the Tibetan Plateau: Recent Normal Faulting Measured by InSAR and Body Wave Seismology [J]. Geophysical Journal International , 2010 , 183 ( 2 ): 503 - 535 .
DECRIEM J , ÁRNADÓTTIR T , HOOPER A , et al . The 2008 May 29 Earthquake Doublet in SW Iceland [J]. Geophysical Journal International , 2010 , 181 ( 2 ): 1128 - 1146 .
BAGNARDI M , HOOPER A . Inversion of Surface Deformation Data for Rapid Estimates of Source Parameters and Uncertainties: A Bayesian Approach [J]. Geochemistry, Geophysics, Geosystems , 2018 , 19 ( 7 ): 2194 - 2211 .
OKADA Y . Surface Deformation Due to Shear and Tensile Faults in a Half-Space [J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts , 1986 , 23 ( 4 ): 128 .
WELLS D L , COPPERSMITH K J . New Empirical Relationships Among Magnitude, Rupture Length, Rupture Width, Rupture Area, and Surface Displacement [J]. The Bulletin of the Seismological Society of America , 1994 , 84 ( 4 ): 974 - 1002 .
WANG L , WANG R , ROTH F , et al . Afterslip and Viscoelastic Relaxation Following the 1999 M 7.4 İzmit Earthquake from GPS Measurements [J]. Geophysical Journal International , 2009 , 178 ( 3 ): 1220 - 1237 .
WANG R , SCHURR B , MILKEREIT C , et al . An Improved Automatic Scheme for Empirical Baseline Correction of Digital Strong-Motion Records [J]. The Bulletin of the Seismological Society of America , 2011 , 101 ( 5 ): 2029 - 2044 .
WANG R , PAROLAI S , GE M , et al . The 2011 Mw 9.0 Tohoku Earthquake: Comparison of GPS and Strong-Motion Data [J]. The Bulletin of the Seismological Society of America , 2013 , 103 ( 2B ): 1336 - 1347 .
LUO H , WANG T , WEI S J . Systematic Comparison of InSAR and Seismic Source Models for Moderate-Size Earthquakes in Western China: Implication to the Seismogenic Capacity of the Shallow Crust [J]. Journal of Geophysical Research: Solid Earth , 2022 , 127 ( 10 ): e2022JB024794 .
TOZER B , SANDWELL D T , SMITH W H F , et al . Global Bathymetry and Topography at 15 Arc Sec: SRTM15+ [J]. Earth and Space Science , 2019 , 6 ( 10 ): 1847 - 1864 .
温扬茂 , 许才军 , 刘洋 , 等 . 升降轨InSAR数据约束下的2007年阿里地震反演分析 [J]. 测绘学报 , 2015 , 44 ( 6 ): 649 - 654 .
WEN Yangmao , XU Caijun , LIU Yang , et al . The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations [J]. Acta Geodaetica et Cartographica Sinica , 2015 , 44 ( 6 ): 649 - 654 .
杨九元 , 温扬茂 , 许才军 . InSAR观测揭示的 2024 年西藏尼玛 Mw 6.0地震同震破裂行为 [J]. 武汉大学学报(信息科学版) , 2024 , DOI: 10.13203/j.whugis20240243 http://dx.doi.org/10.13203/j.whugis20240243 .
YANG Jiuyuan , WEN Yangmao , XU Caijun . Coseismic Rupture Behavior of the 2024 Nima(Tibet)Mw 6.0 Earthquake Revealed by InSAR Observations [J]. Geomatics and Information Science of Wuhan University , 2024 , DOI: 10.13203/j.whugis20240243 http://dx.doi.org/10.13203/j.whugis20240243 .
毛鸿飞 , 谢磊 , 江坤 , 等 . 青藏高原中强地震 InSAR 震源参数反演及其与地震目录的比较 [J]. 武汉大学学报(信息科学版) , 2024 , DOI: 10.13203/j.whugis20240124 http://dx.doi.org/10.13203/j.whugis20240124 .
MAO Hongfei , XIE Lei , JIANG Kun , et al . Source Parameter Inversion of Moderate to Strong Earthquakes and Its Comparison with Earthquake Catalogs in Tibetan Plateau Based on InSAR Observations [J]. Geomatics and Information Science of Wuhan University , 2024 , DOI: 10.13203/j.whugis20240124 http://dx.doi.org/10.13203/j.whugis20240124 .
0
浏览量
0
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621