Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field Investigation
Multi-source datasets, including the UAV-Lidar/Photogrammetry, InSAR, and field investigation data, have been used for revealing the complex surface displacement pattern and focal mechanism of the 2021 Maduo Mw 7.3 earthquake. First, a co-seismic surface deformation field was extracted from the Synt...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/22/5859 |
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| author | Ying-Hui Yang Qiang Xu Jyr-Ching Hu Yun-Sheng Wang Xiu-Jun Dong Qiang Chen Yi-Jun Zhang Hao-Liang Li |
| author_facet | Ying-Hui Yang Qiang Xu Jyr-Ching Hu Yun-Sheng Wang Xiu-Jun Dong Qiang Chen Yi-Jun Zhang Hao-Liang Li |
| author_sort | Ying-Hui Yang |
| collection | DOAJ |
| description | Multi-source datasets, including the UAV-Lidar/Photogrammetry, InSAR, and field investigation data, have been used for revealing the complex surface displacement pattern and focal mechanism of the 2021 Maduo Mw 7.3 earthquake. First, a co-seismic surface deformation field was extracted from the Synthetic Aperture Radar (SAR) images captured by ALOS-2 and Sentinel-1 satellites. Second, the SAR pixel offset tracking results were adopted to detect the initial location of the seismogenic fault. Then, the Lidar digital elevation model with high spatial resolution and field investigation were employed to refine and verify the location of the seismogenic fault. It was found that bifurcated strike-slip rupture should account for the 2021 Maduo earthquake. As indicated by the estimated faulting model based on the InSAR data, the maximal fault slip was ~6.2 m, occurring in the southeast of the main seismogenic fault, and five remarkable slip concentrations controlled the surface displacement of the 2021 Maduo earthquake. Furthermore, the co- and post-seismic InSAR deformation, dilatation, shear strain, Coulomb failure stress, and aftershock sequence suggest that the co-seismic rupture of the two main seismogenic faults have triggered the aseismic slip along the Changmahe fault. Lastly, according to the Coulomb failure stress change due to the historical earthquakes and the 2021 Maduo earthquake, the 1937 M 7.8 earthquake predominantly controlled the Coulomb failure stress change along the Kunlun fault, and the Xidatan-Alake Lake and Maqin segments had a higher risk of future earthquake than the other segments. |
| first_indexed | 2024-03-09T18:02:04Z |
| format | Article |
| id | doaj.art-75306da75c9349e7821b427a991ab3a2 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T18:02:04Z |
| publishDate | 2022-11-01 |
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| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-75306da75c9349e7821b427a991ab3a22023-11-24T09:51:36ZengMDPI AGRemote Sensing2072-42922022-11-011422585910.3390/rs14225859Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field InvestigationYing-Hui Yang0Qiang Xu1Jyr-Ching Hu2Yun-Sheng Wang3Xiu-Jun Dong4Qiang Chen5Yi-Jun Zhang6Hao-Liang Li7State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaDepartment of Geosciences, National Taiwan University, Taipei 10617, TaiwanState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaDepartment of Remote Sensing and Geoinformation Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaDepartment of Remote Sensing and Geoinformation Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaMulti-source datasets, including the UAV-Lidar/Photogrammetry, InSAR, and field investigation data, have been used for revealing the complex surface displacement pattern and focal mechanism of the 2021 Maduo Mw 7.3 earthquake. First, a co-seismic surface deformation field was extracted from the Synthetic Aperture Radar (SAR) images captured by ALOS-2 and Sentinel-1 satellites. Second, the SAR pixel offset tracking results were adopted to detect the initial location of the seismogenic fault. Then, the Lidar digital elevation model with high spatial resolution and field investigation were employed to refine and verify the location of the seismogenic fault. It was found that bifurcated strike-slip rupture should account for the 2021 Maduo earthquake. As indicated by the estimated faulting model based on the InSAR data, the maximal fault slip was ~6.2 m, occurring in the southeast of the main seismogenic fault, and five remarkable slip concentrations controlled the surface displacement of the 2021 Maduo earthquake. Furthermore, the co- and post-seismic InSAR deformation, dilatation, shear strain, Coulomb failure stress, and aftershock sequence suggest that the co-seismic rupture of the two main seismogenic faults have triggered the aseismic slip along the Changmahe fault. Lastly, according to the Coulomb failure stress change due to the historical earthquakes and the 2021 Maduo earthquake, the 1937 M 7.8 earthquake predominantly controlled the Coulomb failure stress change along the Kunlun fault, and the Xidatan-Alake Lake and Maqin segments had a higher risk of future earthquake than the other segments.https://www.mdpi.com/2072-4292/14/22/5859Maduo earthquakeInSARUAV-Lidar DEMco- and post-seismic deformationaseismic slipCoulomb failure stress |
| spellingShingle | Ying-Hui Yang Qiang Xu Jyr-Ching Hu Yun-Sheng Wang Xiu-Jun Dong Qiang Chen Yi-Jun Zhang Hao-Liang Li Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field Investigation Remote Sensing Maduo earthquake InSAR UAV-Lidar DEM co- and post-seismic deformation aseismic slip Coulomb failure stress |
| title | Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field Investigation |
| title_full | Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field Investigation |
| title_fullStr | Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field Investigation |
| title_full_unstemmed | Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field Investigation |
| title_short | Source Model and Triggered Aseismic Faulting of the 2021 Mw 7.3 Maduo Earthquake Revealed by the UAV-Lidar/Photogrammetry, InSAR, and Field Investigation |
| title_sort | source model and triggered aseismic faulting of the 2021 mw 7 3 maduo earthquake revealed by the uav lidar photogrammetry insar and field investigation |
| topic | Maduo earthquake InSAR UAV-Lidar DEM co- and post-seismic deformation aseismic slip Coulomb failure stress |
| url | https://www.mdpi.com/2072-4292/14/22/5859 |
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