Abstract The 2021 Mw7.3 Maduo (Qinghai, China) earthquake ruptured ∼160 km along a poorly known secondary fault inside the Bayanhar block on northern Tibetan plateau, which is generally parallel to Kunlun fault. Here we integrate interseismic (2015–2020) and coseismic geodetic observations quantify strain rate, geometry slip distribution. Our results reveal that seismogenic featured by low (<20 nanostrain/yr) nearly undetectable rate. Three‐dimensional displacement fields maps demonstrate...

Abstract The 5 September 2022 Mw 6.7 Luding earthquake occurred on the Moxi segment of highly active Xianshuihe fault in eastern Tibet. Here, we constrain coseismic slip by jointly inverting displacements measured Global Positioning System, seismometer and Interferometric Synthetic Aperture Radar. Along fault, concentrated left‐lateral strike extends ∼30 km along above 10 depth, producing 0.7–1.0 m shallow slip. Clustered aftershocks inversions suggest that secondary conjugate Mozigou may...

Abstract We model the time‐dependent postseismic displacements following 2001 Mw7.8 Kokoxili earthquake, including both GPS (2001–2002 for near‐field and 2001–2010 far‐field) descending‐track InSAR line‐of‐sight time series (2003–2010) to study three deformation processes. The predicted patterns magnitude from poroelastic rebound are inconsistent with geodetic observations. Far‐field (>200 km rupture) is primarily induced by upper mantle viscoelastic relaxation beneath Tibet Qaidam Basin...

<title>Abstract</title> Damage zones exist along faults, and a comprehensive understanding of fault-zone structures is essential for seismic hazard assessment. Despite extensive geological geophysical observations, the fundamental process controlling formation remains unclear. Here, we integrate observations with analytical numerical models, providing new evidence that earthquake rupture dynamics govern structures. By analyzing scaling distance from fault via strain, fracture, aftershock...

Abstract Large‐scale geodetic measurements of crustal deformation in the north‐central Tibetan Plateau are crucial for improved understanding earthquake‐cycle processes and long‐term seismic hazard assessment. We use GPS velocities Interferometric Synthetic Aperture Radar (InSAR) observations (2015–2020) on eight descending ascending Sentinel‐1 tracks to map surface motions their gradients an area over ∼2,000 km × 350 around Kunlun‐Manyi fault system. The derived line‐of‐sight (LOS) 3D...

Abstract In this study, we utilize C‐band Sentinel‐1 radar images from 2015 to 2022, combined with interseismic horizontal GNSS velocities, construct large‐scale, high‐resolution, 3‐D velocity and strain rate maps over a vast region of southern Tibet. We show the distribution prevailing dilatational accumulation along seven major rift zones. Using 2‐D elastic dislocations invoking two‐fault model in Bayesian framework, quantified decadal extension rates across zones, suggest total 18.4 ± 1.7...

We obtained the rupture process and slip distribution of 2022 Mw6.6 Menyuan earthquake by jointly inverting accelerogram data InSAR measurements. The near-field measurements provide good constraints on shallow distributions (&lt;6 km). enable us to better resolve deeper coseismic (&gt;6 combination two types provided improved constrains earthquake. results from joint inversion reveal a 26-km-long length, which roughly agrees with mapped length optically identified surface trace deformation...

Focusing on stratified tropospheric delay correction in the small-amplitude coseismic displacement field of small-to-moderate earthquakes (&lt;Mw 6.5), we develop a Simple-Stratification-Correction (SSC) approach based empirical phase-elevation relationship and spatial properties troposphere, via an equal-size window segmentation. We validate our SSC method using 23 real that occurred from January 2016 to May 2021 with moment magnitude (Mw) ranging 4.5 6.5. conclude performs well according...

The Mw 6.3 Jinghe earthquake struck Xingjiang Province, China, on 8 August 2017 (05:15:04 UTC); the epicenter was near Kusongmuxieke Piedmont Fault (KPF) of northern Tian Shan Mountains. We used multi-source and multi-track satellite Synthetic Aperture Radar (SAR) imagery Interferometric SAR (InSAR) techniques to reconstruct coseismic displacement field from different line-of-sight geometries. To reduce phase artifacts, we employed multi-temporal scenes acquired by Sentinel-1, reconstructed...

The 2001 Mw7.8 Kokoxili earthquake, which occurred in the north Tibetan Plateau, ruptured ~400 km of westernmost portion Kunlun fault and produced significant time-dependent postseismic deformation over a large area around rupture zone nearby regions. To analyze features along different sections coseismic surface rupture, we describe total cumulative near center produce velocity maps for whole observation period six sub-periods, using InSAR observations (ENVISAT/ASAR, 2003–2010) on five...

The Haiyuan fault zone is an important tectonic boundary and strong seismic activity belt in northeastern Tibet, but no major earthquake has occurred the past ∼100 years, since M8.5 event 1920. current state of strain accumulation potential along have attracted significant attention. In this study, we obtained interseismic deformation field using Envisat/ASAR data period 2003–2010, inverted kinematic parameters including long-term slip rate, locking degree deficit distribution based on InSAR...

Abstract Long-term fault growth involves the evolution of zone architecture, structural maturity, and physical properties. Accurate characterization these features is essential for improving understanding mechanics earthquake hazards. Here, we integrate relocated aftershocks (Wang, Fang, et al., 2021), optical satellite imagery (Li 2023), field measurements (Yuan 2022) to study aftershock thickness decay, coseismic surface strain, off-fault deformation, buried shallow slip 2021 Mw 7.4 Maduo...

ABSTRACT The Mw 7.8 Gorkha earthquake that occurred in 2015 is the largest thrust event middle of main Himalayan fault zone (MHT) past 81 yr. Its impact on regional tectonic stress state and future seismic risks a significant scientific issue worthy in-depth analyses. In this study, we inverted planar fault-slip model (the model), flat-ramp model) double to analyze effect geometry, based steepest descent method (SDM) layered earth model. Compared with model, exhibits wider slip distribution...

Abstract Large block‐bounding faults on the Tibetan plateau are significant geological structures that accommodate tectonic movements and accumulate stress, leading to large earthquakes. Quantifying interseismic slip deficit rate helps better assess earthquake potential. We combine available InSAR (2015–2020) GPS data determine fault coupling along 14 major faults. Spatially dense measurements remarkably improve resolution of model. Combined with a GPS‐constrained block model, we examine...

<p indent="0mm">The 2022 Luding (Sichuan) <italic>M</italic>6.8 earthquake occurred on the Moxi segment of Xianshuihe fault, one most seismically active faults in mainland China. Since 1900, six moderate to strong earthquakes (&gt; <italic>M</italic>6.5) have ruptured different sections fault. This has a complex tectonic setting as it forms an intersection zone Anninghe, Daliangshan, Xiaojin, and Longmenshan faults. In this study, we investigated distribution coseismic deformation order...

Research Article| August 28, 2018 Source Model of the 2016 Kumamoto, Japan, Earthquake Constrained by InSAR, GPS, and Strong‐Motion Data: Fault Slip under Extensional Stress Yingfeng Zhang; Zhang aState Key Laboratory Dynamics, Institute Geology, China Administration, Yard No. 1, Hua Yan Li, Chaoyang District, Beijing 100029, China, jingqing129@163.comxjshan@163.comzhanggh@ies.ac.cngwenyu@alaska.edu571217872@qq.comdqyquchy@163.com Search for other works this author on: GSW Google Scholar...

The 2015 Mw 7.8 Gorkha, Nepal, earthquake occurred in the central Himalayan collisional orogenic belt, which demonstrated complex fault kinematics and significant surface deformation. coseismic deformation has been well documented by previous studies using Global Positioning System (GPS) Interferometric Synthetic Aperture Radar (InSAR) data. However, due to some limitations of spatially sparse GPS stations InSAR only-one-dimensional observation line-of-sight (LOS) direction, complete...

The 2021 Mw 7.3 Maduo earthquake revealed the significant seismic hazard of faults developed within Bayan Har Block eastern Tibet, China (e.g., Kunlun Pass–Jiangcuo Fault). Relocated aftershock data are in good agreement with Interferometric Synthetic Aperture Radar (InSAR) coseismic displacement field and investigations. In this study, we used point cloud fitting to model relocated aftershocks earthquake, obtained detailed geometry characteristics seismogenic fault. Based on InSAR...

Abstract Investigating the spatiotemporal characteristics of aseismic shallow creep provides insights into interseismic steady-state and/or postseismic transient behavior faults. In this study, we focus on Kangding segment Xianshuihe fault in eastern Tibet, where 2014 Mw 5.9 earthquake occurred. Previous geodetic observations 1999–2021 identified apparent along segment; however, whether slip is secular creep, afterslip earthquake, or combined effect remains unresolved. We process descending...

As one of the large-scale block-bounding faults in northeastern Tibetan Plateau, Qilian-Haiyuan fault system accommodates a large portion north-eastward motion Plateau. In 2016 and 2022, two strong earthquakes Mw6.0 Mw6.6 occurred Menyuan area near Lenglongling (LLLF) at western segment fault. These adjoining events, only 40 km apart, exhibited notable differences focal mechanisms rupture kinematics, indicating complex geometries tectonic structures region, which are still poorly known....