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2025年1月7日西藏定日MS6.8地震触发滑坡与砂土液化特征初步研究
PDF(17770 KB)
PDF(17770 KB)
The rapid mapping of secondary effects triggered by strong earthquakes is crucial for understanding the disaster-causing mechanisms of mainshock events. The Tibetan Plateau, characterized by its higher altitude, sparse population, and challenging field conditions, presents significant difficulties for on-site investigations. Consequently, it is significant to analyze the distribution of earthquake-induced landslides and soil liquefaction utilizing post-earthquake emergency satellite imagery. We aim to systematically identify the spatial distribution characteristics of secondary hazards triggered by the M S6.8 Dingri earthquake on January 7, 2025. We utilized emergency imaging data from high-resolution Chinese satellite images. We employed manual visual interpretation through a comparative analysis of pre- and post-earthquake imagery supplemented by field investigations. The following results are obtained: (1) The mainshock triggered 2 869 coseismic landslides, with two major concentration zones in the north and south. Approximately 60% of these landslides occurred in high-altitude regions between 5 000-6 000 m, predominantly manifesting as slope debris flows and collapses with limited effect for far away the residents. (2) The mainshock also induced about 400,000 soil liquefaction pits, primarily concentrated in the floodplains and low terraces of the Pengqu River at elevations of 4 100-4 300 m. These liquefaction sites are distributed across the Democuo Basin, Guojia Basin, and Dingjie Basin, with some occurrences in Quaternary tills at elevations reaching 5 200 m. The distribution pattern of coseismic landslides, primarily as slope debris flows in higher-altitude (about 5 000 m) areas, suggests a possible correlation with the topographic amplification effect. Meanwhile, the spatial extent of soil liquefaction, spanning three basins in the southern section of the Dingjie-Shenzha Rift system, indicates that single secondary-fault rupture event within a single basin can significantly impact other adjacent secondary-faulted basins, leading to severe secondary disasters, even the controlled faults without coseismal faulting.
Tibetan Plateau / Dingri M S6.8 earthquake / soil liquefaction / earthquakes / landslides / Dingjie-Shenzha Rift / southern Tibetan rift systems
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Armijo, R., Tapponnier, P., Mercier, J. L., et al., 1986. Quaternary Extension in Southern Tibet: Field Observations and Tectonic Implications. Journal of Geophysical Research: Solid Earth, 91(B14): 13803-13872. https://doi.org/10.1029/jb091ib14p13803
|
|
Chen, W. K., Rao, G., Kang, D. J., et al., 2023. Early Report of the Source Characteristics, Ground Motions, and Casualty Estimates of the 2023 Mw 7.8 and 7.5 Turkey Earthquakes. Journal of Earth Science, 34(2): 297-303. https://doi.org/10.1007/s12583-023-1316-6
|
|
Deng, Q. D., Cheng, S. P., Ma, J., et al., 2014. Seismic Activities and Earthquake Potential in the Tibetan Plateau. Chinese Journal of Geophysics, 57(7): 2025-2042 (in Chinese with English abstract).
|
|
Elliott, J. R., Walters, R. J., England, P. C., et al., 2010. Extension on the Tibetan Plateau: Recent Normal Faulting Measured by InSAR and Body Wave Seismology. Geophysical Journal International, 183(2): 503-535. https://doi.org/10.1111/j.1365-246x.2010.04754.x
|
|
He, X. L., Xu, C., Qi, W. W., et al., 2021. Landslides Triggered by the 2020 Qiaojia Mw5.1 Earthquake, Yunnan, China: Distribution, Influence Factors and Tectonic Significance. Journal of Earth Science, 32(5): 1056-1068. https://doi.org/10.1007/s12583-021-1492-1
|
|
Hu, G. M., Xu, Y. R., Liu, H., et al., 2025. Discussion on Seismic-Generating Potential and Seismic Risk of Normal Fault Zone in South Tibet Rift System. Earth Science, 50(5):1794-1812 (in Chinese).
|
|
Li, Z. C., Sun, J. Z., Ji, Z. W., et al., 2025. Rapid Simulation of Acceleration Time History at the Qomolangma Seismic Station during the Ms6.8 Dingri Earthquake in Tibet on January 7, 2025. Earth Science, 50(2):798-804 (in Chinese with English abstract).
|
|
Liang, P., Xu, Y. R., Zhou, X. C., et al., 2025. Coseismic Surface Ruptures of M W7.8 and M W7.5 Earthquakes Occurred on February 6, 2023, and Seismic Hazard Assessment of the East Anatolian Fault Zone, Southeastern Türkiye. Science China Earth Sciences, 68(2): 611-625. https://doi.org/10.1007/s11430-024-1457-7
|
|
Liu, J., Ji, C., Zhang, J. Y., et al., 2015. Seismogenic Tectonic Background and Characteristics of the Mw7.8 Earthquake in Nepal on April 25, 2015. Chinese Science Bulletin, 60(27): 2640-2655 (in Chinese with English abstract).
|
|
Liu, J., Xu, J., Ou, Q., et al., 2023. Discussion on the Overestimated Magnitude of the 1920 Haiyuan Earthquake. Acta Seismologica Sinica, 45(4): 579-596 (in Chinese with English abstract).
|
|
Liu-Zeng, J., Zhang, Z., Rollins, C., et al., 2020. Postseismic Deformation Following the 2015 M W7.8 Gorkha (Nepal) Earthquake: New GPS Data, Kinematic and Dynamic Models, and the Roles of Afterslip and Viscoelastic Relaxation. Journal of Geophysical Research: Solid Earth, 125(9). https://doi.org/10.1029/2020jb019852
|
|
Lu, L. Y., Xu, Y. R., Tang, J. C., et al., 2024. Using High-Spatial-Resolution Images to Extract the Distribution of Coseismic Landslides and Soil Liquefaction Triggered by the 2024 Hualien M W7.4 Earthquake in Eastern Taiwan. Earthquake Research Advances. https://doi.org/10.1016/j.eqrea.2024.100356
|
|
Molnar, P., Tapponnier, P., 1975. 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. Science, 189(4201): 419-426. https://doi.org/10.1126/science.189.4201.419
|
|
Sheng, S. Z., Wan, Y. G., Jiang, C. S., et al., 2015. Preliminary Study on the Static Stress Triggering Effects on China Mainland with the 2015 Nepal M S8.1 Earthquake. Chinese Journal of Geophysics, 58(5): 1834-1842 (in Chinese with English abstract).
|
|
Shi, F., Liang, M. J., Luo, Q. X., et al., 2025. Seismogenic Structure and Coseismic Surface Rupture Characteristics of the M6.8 Dingri Earthquake in Tibet on January 7, 2025. Seismological Geology, 47(1): 1-15 (in Chinese).
|
|
Wan, Y. G., Sheng, S. Z., Li, X., et al., 2015. Stress Influence of the 2015 Nepal Earthquake Sequence on Chinese Mainland. Chinese Journal of Geophysics, 58(11): 4277-4286 (in Chinese with English abstract).
|
|
Wu, J. J., Chen, W. K., Jia, Y. J., et al., 2025. Rapid Seismic Intensity and Disaster Assessment Based on Dense Seismic Array: An Case of the 2025 Rikaze M S6.8 Earthquake in Xizang. Earth Science, 50(5): 1770-1781 (in Chinese with English abstract). https://doi.org/10.3799/dqkx.2025.035
|
|
Wu, Z. H., Zhao, G. M., Liu, J., 2016. Tectonic Genesis of the 2015 M S8.1 Earthquake in Nepal and Its Impact on Future Strong Earthquake Trends in the Tibetan Plateau and Adjacent Areas. Acta Geologica Sinica, 90(6): 1062-1082 (in Chinese with English abstract).
|
|
Xu, X. W., Wang, S. G., Cheng, J., et al., 2025. Shaking the Tibetan Plateau: Insights from the M W7.1 Dingri Earthquake and Its Implications for Active Fault Mapping and Disaster Mitigation. NPJ Natural Hazards, 2: 16. https://doi.org/10.1038/s44304-025-00074-7
|
|
Xu, Y. R., He, H. L., Deng, Q. D., et al., 2018. The CE 1303 Hongdong Earthquake and the Huoshan Piedmont Fault, Shanxi Graben: Implications for Magnitude Limits of Normal Fault Earthquakes. Journal of Geophysical Research: Solid Earth, 123(4): 3098-3121. https://doi.org/10.1002/2017jb014928
|
|
Xu, Y. R., Liu‐Zeng, J., Allen, M. B., et al., 2022. Understanding Historical Earthquakes by Mapping Coseismic Landslides in the Loess Plateau, Northwest China. Earth Surface Processes and Landforms, 47(9): 2266-2282. https://doi.org/10.1002/esp.5375
|
|
Yang, T., Wang, S. G., Fang, L. H., et al., 2025. Analysis of Earthquake Sequence and Seismogenic Structure of the 2025 M S6.8 Dingri Earthquake in Tibetan Plateau. Earth Science,50(5): 1721-1732 (in Chinese with English abstract). https://doi.org/10.3799/dqkx.2025.033
|
|
Zhang, P. Z., Wang, W. T., Gan, W. J., et al., 2022. Present Tectonic Deformation and Geodynamic Processes of the Tibetan Plateau. Acta Geologica Sinica, 96(10): 3297-3313 (in Chinese with English abstract).
|
|
Zhao, B., Su, L. J., Xu, Q., et al., 2023. A Review of Recent Earthquake-Induced Landslides on the Tibetan Plateau. Earth-Science Reviews, 244. https://doi.org/10.1016/j.earscirev.2023.104534
|
|
Zhou, J., Li, L., 2025. An Open Access 90 m Resolution V S30 Data and Map for Areas Affected by the January 2025 M6.8 Dingri Xizang, China Earthquake. Earthquake Science, 38. https://doi.org/10.29382/eqs-D-25-00004
|
|
Zou, J. J., Shao, Z. G., He, H. L., et al., 2025. Surface Rupture Interpretation and Building Damage Statistics of the M S Earthquake in Dingri, Xizang Province, January 7, 2025. Seismological Geology, 47(1): 16-35 (in Chinese).
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