Article
Multidisciplinary Sciences
Yang Gao, HuRong Duan, YongZhi Zhang, JiaYing Chen, HeTing Jian, Rui Wu, WenHao Yin
Summary: The 2019 Ridgecrest, California seismic sequence, which included an Mw6.4 foreshock and Mw7.1 mainshock, represented the largest regional seismic events in the past 20 years. By analyzing precise positioning data and Interferometric Synthetic Aperture Radar (InSAR) data, researchers were able to accurately determine the slip distribution and depths of eight faults, revealing that most faults were sinistral strike-slips.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Qiang Li, Wei Wang, Jianfei Wang, Jingfa Zhang, Dan Geng
Summary: This study introduces a method for evaluating building damage based on seismic deformation, revealing linear or quadratic relationships between seismic damage and deformation indices for different types of structures. The effectiveness of the modeling method is validated through data from the Yushu earthquake in 2010, providing an accurate reference for post-earthquake rescue operations and decision-making processes.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Environmental Sciences
Panfeng Ji, Xiaolei Lv, Rui Wang
Summary: This study proposes a new processing method based on the strain model and the Kalman filter for obtaining high-precision three-dimensional surface deformation time series. The experimental results demonstrate that this method can generate high-precision and high-resolution deformation time series in the temporal and spatial domains.
Article
Environmental Sciences
Xiaopeng Tong, Xiaohua Xu, Shi Chen
Summary: In this study, the coseismic deformation of the 2021 Maduo earthquake was investigated using satellite radar observations. The constructed coseismic slip model revealed the characteristics and parameters of the fault associated with the earthquake. This study has important implications for earthquake hazard assessment of the Bayan Har block.
Article
Geochemistry & Geophysics
Keke Xu, Weiwei Sun, Jicang Wu
Summary: This study proposes a new method for retrieving 3-D deformation maps by combining InSAR-LOS data and the physical properties of crustal deformation. By inverting fault slip and geometry parameters based on a simplified elastic dislocation model, and estimating continuous 3-D surface deformation direction vectors, the method shows good spatial consistency and higher application potentials than forward modeling.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Engineering, Aerospace
Bingquan Han, Chengsheng Yang, Zhenhong Li, Chen Yu, Chaoying Zhao, Qin Zhang
Summary: The coseismic and postseismic deformation caused by the Petermann earthquake in the Northern Territory of Australia have been determined using satellite images. The earthquake ruptured in the NNW direction with a magnitude of Mw 6.06, and the postseismic deformation showed a gradually decaying trend with a maximum displacement of 5.4 cm within 858 days.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Environmental Sciences
Chuanjin Liu, Lingyun Ji, Liangyu Zhu, Caijun Xu, Wenting Zhang, Jiangtao Qiu, Guohua Xiong
Summary: The Ordos Block in China experiences tectonic activity and frequent earthquakes. Based on geodetic observations, a high-precision 3D deformation field was created using InSAR, GPS, and leveling. Non-tectonic deformation patterns caused by groundwater, oil, gas extraction, and mining were revealed, as well as tectonic deformation fields showing subsidence in the southern margin and uplift in the interior and northeastern margins. The upwelling of deep materials beneath the northeastern margin leads to surface uplift, matching the thickening of the lower crust in the area south of 38 degrees N.
Article
Geosciences, Multidisciplinary
Zeyu Jin, Yuri Fialko
Summary: The 2021 Maduo earthquake in northeast Tibet ruptured a 150 km-long left-lateral fault. Using Synthetic Aperture Radar data, a finite fault model was derived to investigate slip distribution with depth. Postseismic observations showed surface slip up to 0.1 m, partially eliminating the coseismic slip deficit in the uppermost crust.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Sen Zhu, Yangmao Wen, Xiaodong Gong, Jingbin Liu
Summary: The largest earthquake (Mw 6.4) in northwestern Croatia occurred near the city of Petrinja on December 29, 2020. The study used satellite images to investigate the geometric and kinematic properties of the earthquake and identified the coseismic and early postseismic surface displacements. The postseismic deformation was attributed to a combination of afterslips and aftershocks in the area, and the correlation between Coulomb stress change and the distribution of aftershocks helped identify active faults and estimate seismic hazards in the region.
Article
Environmental Sciences
Wei Peng, Qijie Wang, Yunmeng Cao, Xuemin Xing, Wenjie Hu
Summary: A long-strip differential interferometric synthetic aperture radar (DInSAR) measurement based on multi-frame image mosaicking is an effective method to measure large-scale ground deformation. However, in regions with complex coastlines, there are significant tidal displacement residuals. By integrating GPS reference station network and global/regional ocean tidal models, a three-dimensional ground ocean tidal loading (OTL) displacements grid is generated to accurately evaluate the impact of ground tidal effect on mosaic DInSAR interferograms.
Article
Environmental Sciences
Kunchao Lei, Fengshan Ma, Beibei Chen, Yong Luo, Wenjun Cui, Yi Zhou, He Liu, Te Sha
Summary: Excessive groundwater exploitation has led to 3D surface deformation in the Beijing Plain, mainly manifested as land subsidence. The surface deformation is controlled by the basement structure, with varying horizontal movement rates and directions in different directions. The groundwater funnel corresponds to land subsidence, with deformation directed towards areas with lower groundwater levels.
Article
Environmental Sciences
Bo Yang, Huaping Xu, Liming Jiang, Ronggang Huang, Zhiwei Zhou, Hansheng Wang, Wei Liu
Summary: In this study, a general multi-component temporal coherence model is proposed for 3-D phase unwrapping of seasonal deformation areas. The effectiveness of the proposed method is confirmed through experimental results. The method achieves high phase consistency, accurate corrected digital elevation model (DEM), and deformation information monitoring with high-density and high-coverage PS pixels.
Article
Geosciences, Multidisciplinary
Ling Zhang, Shiming Liang, Xiaoping Yang, Weijun Gan, Chenglong Dai
Summary: The KJFZ is considered the southernmost major fault in the Tibetan plateau's strike-slip fault system, but the strike-slip rates are still debated. New GPS measurements show different dextral strike-slip rates for different parts of the Jiali fault.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Environmental Sciences
Wenshu Peng, Xuri Huang, Zegen Wang
Summary: The 2017 Jiuzhaigou earthquake with a magnitude of 7.0 occurred in the transition zone between the Tazang fault, Huya fault, and Minjiang fault, which are part of the East Kunlun fault system. This study used SAR data from the Sentinel-1 satellite and the D-InSAR method to observe surface displacement. A steerable pyramid filtering method was proposed to enhance geological features and coseismic deformation. The results indicate left-lateral slip dominated the earthquake, with horizontal deformation being the main surface movement.
Article
Engineering, Aerospace
Xiaoyi Wang, Keke Xu, Xinqi Liu, Mosi Zhang, Shuaipeng Wang
Summary: The MS6.4 Yangbi earthquake occurred on 21 May 2021 along the Weixi-Qiaohou-Weishan fault at the southeastern margin of the Tibetan Plateau. By integrating GNSS and InSAR observations, the coseismic deformation fields were accurately obtained. The aftershock precision location data was used to constrain the fault parameters and improve the fault model. The change of coseismic Coulomb stress was calculated based on the fault model, and its triggering relationship with the aftershock distribution was discussed.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Environmental Sciences
Xiaogang Song, Yu Jiang, Xinjian Shan, Wenyu Gong, Chunyan Qu
Article
Geochemistry & Geophysics
Yu Jiang, Pablo J. Gonzalez
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geochemistry & Geophysics
Yu Jiang, Pablo J. Gonzalez, Roland Burgmann
Summary: In 2020, a doublet of earthquakes occurred in the Alaska-Aleutian subduction zone. The first earthquake ruptured a seismic gap that had not experienced large earthquakes since 1917, and the second earthquake broke a trench-perpendicular fault. Geodetic inversions were used to analyze the fault slip distributions of the earthquakes and revealed the segmented structure of the seismic gap.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Yu Jiang, Sergey V. Samsonov, Pablo J. Gonzalez
Summary: Improved imaging of fault slip is crucial for understanding earthquakes and faulting. By introducing a new regularization method, we successfully recovered complex slip propagation patterns and estimated the spatio-temporal evolution of fault slip. Applying the method to a seismic swarm, we found that aseismic slip played a significant role and the slip rates were consistent with slow earthquake processes.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)