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 ascending and descending interferometric synthetic aperture radar data are used to investigate the fault rupture slip model of 2018 Mw 7.5 Sulawesi, Indonesia, earthquake. best fitting indicates that this earthquake ruptured not only a segment extending Palu north but also northwestern offshore. on onshore is predominant left‐lateral strike slip. offshore dominated by normal faulting with maximum ~6.3 m. newly discovered likely be cause tsunami after shock. Combined previous...

The 21 May 2021 Maduo earthquake was the largest event to occur on a secondary fault in interior of active Bayanhar block north-central Tibetan plateau last twenty years. A detailed kinematic study helps us better understand seismogenic environments faults within block, and its relationship with block-bounding faults. In this study, firstly, SAR images are used obtain coseismic deformation fields. Secondly, we use strain model-based method steepest descent (SDM) resolve three-dimensional...

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...

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...

We investigate the slip distribution of 2008 May 12 Wenchuan Ms 7.9 earthquake using GPS data and InSAR measurements under a linear inversion scheme, with emphasis on effect three factors, including constraint rake, different discretizations, layered elastic model. Within our parameterization context, we find most influential factor would be rake. Without model seems physically wrong depth 15 km, due to limited resolution geodetic used, especially one orbit measurements. Thus it is necessary...

Abstract Knowledge of the slip behavior Altyn Tagh fault (ATF) has significant implications for our understanding tectonic deformation Tibetan Plateau. In this study, we process Global Positioning System (GPS) data spanning 2009–2017 across western ATF, merge solution with recently published GPS velocities, and obtain a dense velocity field northern Tibet. We introduce an elastic block model estimate rate, interseismic coupling (ISC), seismic moment accumulation rate along ATF. The estimated...

Interferometric synthetic aperture radar (InSAR) data from 6 Envisat ASAR descending tracks; spanning the 2003–2010 period; was used to measure interseismic strain accumulation across Northeastern Tibetan Plateau. Mean line-of-sight (LOS) ratemaps are computed by stacking atmospheric-corrected and orbital-corrected interferograms. The one track with different results or two parallel; partially overlapping show a consistent pattern of left-lateral motion fault; which demonstrates MERIS ECMWF...

Investigating relationships between temporally- and spatially-related continental earthquakes is important for a better understanding of the crustal deformation, mechanism earthquake nucleation occurrence, triggering effect earthquakes. Here we utilize Global Positioning System (GPS) velocities before after 2008 Mw 7.9 Wenchuan to invert fault coupling Longmenshan Fault (LMSF) investigate impact on 2013 6.6 Lushan earthquake. The results indicate that, earthquake, segments were strongly...

Taking the 2017 Mw6.5 Jiuzhaigou earthquake as a case study, ionospheric disturbances (i.e., total electron content and TEC) thermal infrared (TIR) anomalies were simultaneously investigated. The characteristics of temperature brightness blackbody (TBB), medium-wave (MIB), outgoing longwave radiation (OLR) extracted compared with TEC. We observed different relationships among three types TIR according to seismic or aseismic conditions. A wide range positive TEC occurred southern epicenter....

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...

This study focuses on the crustal deformation and interseismic fault coupling along strike-slip Kunlun fault, northern Tibet, whose western segment ruptured in 2001 Mw 7.8 Kokoxili earthquake. We first integrated published Global Positioning System (GPS) velocity solutions calculated strain rate fields covering fault. Our results show abnormally high post-earthquake values across ruptures; furthermore, these exceed those pre-earthquake data. Together with two tracks of interferometric...

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 (<6 km). enable us to better resolve deeper coseismic (>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...

Research Article| May 16, 2018 Source Fault and Slip Distribution of the 2017 Mw 6.5 Jiuzhaigou, China, Earthquake Its Tectonic Implications Yingfeng Zhang; Zhang aState Key Laboratory Dynamics, Institute Geology, China Administration, Yard No. 1, Hua Yan Li, Chaoyang District, Beijing 100029, jingqing129@163.com, zhanggh@ies.ac.cn, xjshan@163.com, huiping@ies.ac.cn, 571217872@qq.com, gwenyu@alaska.edu, dqyquchy@163.com Search for other works by this author on: GSW Google Scholar Guohong...

The Haiyuan-Liupanshan fault, an active tectonic feature at the Tibetan Plateau's northeastern boundary, was ruptured by two M8 earthquakes (1920 and 1927) bracketing unbroken section (the Tianzhu seismic gap). A high hazard is expected along gap. To monitor deformation characteristics do a risk assessment, we made measurements newly built campaign-mode Global Positioning System (GPS) stations 13 pre-existing in 2013 2014. Adding existing data from 1999 to 2014, derived new velocity field....

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...