Article
Geochemistry & Geophysics
Nikos Svigkas, Simone Atzori, Andrey Kozhurin, Cristiano Tolomei, Andrea Antonioli, Giuseppe Pezzo
Summary: On January 9, 2020, a M6.4 strike-slip earthquake occurred in the Bering Sea, north of the Asian margin. The earthquake revealed a previously unknown active fault with left-lateral kinematics, crossing the Khatyrka-Vyvenka fault zone. This fault structure, along with another similar structure to the east, has created a segmented, step-like boundary of the plate/stream.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Xiaohang Wang, Caijun Xu, Zhuohui Xiao, Ying Peng
Summary: This study investigates the earthquake sequence in Lombok, Indonesia using satellite radar images and finds that the surface deformation is mainly uplift without surface rupture. It suggests that the Lombok sequence may have ruptured the Flores thrust and the magmatic plumbing systems of Rinjani volcano played a critical role in the fault rupture. Additionally, it identifies a seismic gap in the northern part of the Sumbawa region.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Ping He, Yangmao Wen, Shuiping Li, Kaihua Ding, Zhicai Li, Caijun Xu
Summary: The Tien Shan is the largest and most active intracontinental orogenic belt on Earth, providing a natural laboratory for understanding Cenozoic orogenic processes driven by the India-Asia collision. A Mw 6.1 earthquake that struck the Kalpin region on January 19, 2020 has highlighted the ongoing orogenic processes and potential seismic hazard in the area. Analysis of geodetic observations has revealed a nearly subhorizontal decollement plane in the region, indicating a risk of frequent moderate earthquakes in the future.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Edwin Nissen, Musavver Didem Cambaz, Elyse Gaudreau, Andrew Howell, Ezgi Karasozen, Elena Savidge
Summary: This study investigates the active tectonics in southwestern Turkey and reveals the dominant normal faulting orientation in the region. It also highlights the discrepancy between fault orientations in topography and actual faulting activity. The research provides valuable insights into the earthquake hazards in the area.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
J. Maurer, R. Dutta, A. Vernon, S. Vajedian
Summary: The 7.2 magnitude earthquake that occurred in Nippes, Haiti on August 14, 2021 ruptured multiple segments of the Enriquillo-Plantain Garden Fault Zone. The fault slip occurred on both sides of a restraining bend, resulting in reverse-slip and left-lateral slip. Afterslip also occurred at shallow depths in the vicinity of the coseismic rupture areas.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Eutizio Vittori, Anna Maria Blumetti, Valerio Comerci, Pio Di Manna, Luigi Piccardi, Dashamir Gega, Ismail Hoxha
Summary: The earthquake that occurred on November 26, 2019 was the strongest in Albania in recent decades, causing damage with a intensity of VIII to IX EMS around Durres. The main environmental effects included uplift and liquefaction, with the rupture parameters indicating a reverse slip on a NW-SE trending plane. Historical earthquakes and the regional tectonic setting suggest that the last earthquake may not represent the actual maximum seismic and surface faulting hazards in northwestern Albania, calling for further detailed studies in the area.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Lejun Lu, Yu Zhou
Summary: This study presents new geodetic observations of the 1976 Chaldiran earthquake in eastern Turkey, using historical KH imagery and modern Pleiades stereo imagery. The analysis reveals that the coseismic slip at the Hidirmentes segment is around 4.0 m, larger than the surface displacement of 3 m. This suggests that the earthquake deformation is a combination of slip on the primary fault and off-fault deformation. The study also finds a constant ratio of horizontal to vertical offsets, indicating characteristic slip behavior of the Chaldiran fault in the late Quaternary.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geosciences, Multidisciplinary
F. Liu, J. R. Elliott, T. J. Craig, A. Hooper, T. J. Wright
Summary: InSAR time series analysis can better resolve coseismic displacement signals of earthquakes, improve the resolving power of InSAR for earthquake studies, and yield more robust earthquake modeling results.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
S. Baize, S. Amoroso, N. Belic, L. Benedetti, P. Boncio, M. Budic, F. R. Cinti, M. Henriquet, P. Jamsek Rupnik, B. Kordic, S. Markusic, L. Minarelli, D. Pantosti, S. Pucci, M. Spelic, A. Testa, S. Valkaniotis, M. Vukovski, J. Atanackov, J. Barbaca, M. Bavec, R. Brajkovic, V Brcic, M. Caciagli, B. Celarc, R. Civico, P. M. De Martini, R. Filjak, F. Iezzi, A. Moulin, T. Kurecic, M. Metois, R. Nappi, A. Novak, M. Novak, B. Pace, D. Palenik, T. Ricci
Summary: On 29 December 2020, a shallow earthquake of magnitude M-w 6.4 struck northern Croatia, causing significant coseismic environmental effects such as surface deformation, liquefaction, and slope failures. The surface rupture, named the Petrinja-Pokupsko Fault, is discontinuous and shows evidence of slip on a right lateral fault. Liquefaction extends over an area of nearly 600 km(2) around the epicentre. The environmental effects of the earthquake are consistent with the usual scaling relationships.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Sandra Slead, Meng (Matt) Wei
Summary: Interferometric Synthetic Aperture Radar (InSAR) is used to measure ground deformation caused by underground nuclear testing, and a finite-element model (FEM) is presented to analyze the nuclear test site in North Korea using InSAR data. The model incorporates topography, mechanical heterogeneity and simulates elastic deformation caused by underground explosions. Results show that mechanical layering has a significant impact on deformation modeling. A parameter search is performed to estimate the yield and depth of burial for the 4th nuclear test in North Korea. The study provides an independent and complementary method for estimating yield in data-limited regions.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Mahin Jafari, Mahtab Aflaki, Zahra Mousavi, Andrea Walpersdorf, Khalil Motaghi
Summary: The Ganaveh earthquake occurred on April 18, 2021 in the southwest of the Dezful embayment, Iran. It was a mainly compressive event with a magnitude of M-w 5.8. The InSAR coseismic displacement maps showed a maximum surface displacement of 17 cm in the satellite line of sight. The earthquake occurred within the competent layers of the Zagros sedimentary cover, beneath the Gachsaran formation.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Aisling O'Kane, Alex Copley
Summary: Rapid urban growth has increased population density in foreland basins, leading to higher earthquake risk. Seismic wave propagation in these areas is mainly controlled by source depth and basin structure. Matching basin depth with dominant wavelength results in maximum ground motion.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Meng Zhu, Qiming Zeng, Jian Jiao
Summary: This study emphasizes the importance of assessing the impact of InSAR ionospheric and tropospheric corrections on underground nuclear explosion modeling. A case study on the 4th North Korea (NKT-4) underground nuclear test was conducted using ALOS-2 liters-band SAR images, revealing the significance of atmospheric corrections on InSAR analysis. The research findings highlight the need for thorough investigation and quantitative assessment of atmospheric effects in InSAR focal mechanism solutions.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Asli Dogru, Fatih Bulut, Cenk Yaltirak, Bahadir Aktug
Summary: The study analyzed coseismic surface displacements of the 2020 Elazig earthquake using GPS measurements, revealing the fault slip distribution and static stress change, with results indicating a nearly pure sinistral mechanism for the main shock's movement.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Yijun Zhang, Han Bao, Yosuke Aoki, Akinori Hashima
Summary: We constructed an integrated rupture model of the 2021 M-w 7.1 Fukushima earthquake and analyzed its kinematic rupture, slip distribution, and stress changes. The study found that the rupture propagated along both the strike and dip directions, with a large-slip area located southwest to the hypocentre. The temporal change of stress suggested that the occurrence of the Fukushima earthquake may have been promoted by the post-seismic deformation due to the 2011 Tohoku-Oki earthquake.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Guanya Wang, Bing Xu, Zhiwei Li, Haiqiang Fu, Han Gao, Jie Wan, Changcheng Wang
Summary: A novel DS-InSAR method is proposed, applying the SKP decomposition method to DS candidates. Unlike existing methods, the proposed method considers both polarimetric and interferometric coherence information simultaneously, leading to the separation of polarimetric scattering process for each target and ensuring the physical reliability of the phase optimization solution. The evaluation using C-band Radarsat-2 SAR images over Kilauea Volcano demonstrates that the proposed method achieves a higher density of measurement scatterer points and a higher quality of DS interferometric phase with a temporally stable phase center compared to other methods.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Geochemistry & Geophysics
Zefa Yang, Jianjun Zhu, Jian Xie, Zhiwei Li, Lixin Wu, Zelin Ma
Summary: The proposed method aims to improve the accuracy of estimated 3-D mining displacements by dynamically estimating model parameters from multi-track InSAR observations and utilizing the conjugate gradient method for displacement resolution. The new method demonstrates better performance compared to the traditional Sin-LPM method, showing potential for enhancing InSAR-based retrieval of 3-D displacements induced by various activities.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Zefa Yang, Bing Xu, Zhiwei Li, Lixin Wu, Jianjun Zhu
Summary: This article proposes a new method for predicting mining-induced displacements by incorporating InSAR with a temporal model. Compared to previous methods, this approach requires fewer prior parameters and shows high accuracy in experiments.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Environmental Sciences
Jihong Liu, Jun Hu, Zhiwei Li, Zhangfeng Ma, Jianwen Shi, Wenbin Xu, Qian Sun
Summary: This study used SAR data to investigate the surface displacement and strain characteristics of the 2022 Menyuan earthquake, revealing that it was dominated by left-lateral slip and had larger fault-parallel displacement on the southern side. It also identified a severely deformed near-fault area and clearly expanding and compressed zones.
Article
Environmental Sciences
Yuedong Wang, Guangcai Feng, Zhiwei Li, Shuran Luo, Haiyan Wang, Zhiqiang Xiong, Jianjun Zhu, Jun Hu
Summary: In recent years, the availability of SAR satellite data and the development of InSAR technology have made wide-scale ground-deformation monitoring possible. This study proposes a strategy called WAVS-InSAR, which combines stacking technology and advanced TS-InSAR technology to achieve fast calculation of ground-deformation rate and obtain fine deformation time series. The strategy uses an adaptive recognition algorithm to identify the spatial distribution and area of deformation regions in the wide study area and generates variable-scale deformation products.
Article
Geochemistry & Geophysics
Wenbin Xu, Xiaoge Liu, Roland Buergmann, Lei Xie, Guangcai Feng, Zhiwei Li, Lixin Wu
Summary: This study investigates the surface deformation after the 2018 Papua New Guinea earthquake and deduces fault slip models using remote sensing data. The results reveal that the earthquake reactivated fault structures and most of the slip occurred between 5 and 25 km. Additionally, three separated postseismic slip zones were identified.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Engineering, Civil
Yuedong Wang, Guangcai Feng, Zhiwei Li, Wenbin Xu, Haiyan Wang, Jun Hu, Shangwei Liu, Lijia He
Summary: This study uses satellite data to recover the ground displacement time-series of a large oasis agricultural area in western China and identifies multiple subsidence areas related to overexploitation of groundwater. In areas with concentrated groundwater exploitation, small separate subsidence areas grow larger and become connected, forming giant subsidence clusters. The results of this study will contribute to the detection of aquifer health, assessment of ecological environment stability, and sustainable development of the agricultural economy in the region.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Guanya Wang, Kailiang Deng, Qi Chen, Zhiwei Li, Han Gao, Jun Hu, Deliang Xiang
Summary: A novel DS preprocessing algorithm based on PIHP identification is proposed, which combines polarimetric intensity, interferometric coherence, and phase information. Tested with quad-polarization data, the method shows significant improvement in phase quality and point density, with three times higher point density in vegetation areas compared to the traditional method.
Article
Environmental Sciences
Yan Zhu, Bing Xu, Zhiwei Li, Jie Li, Jingxin Hou, Wenxiang Mao
Summary: Atmospheric delay is a major error in ground-based synthetic aperture radar (GBSAR). Existing compensation methods for this error include external meteorological data correction, polynomial fitting, and persistent scatterers SAR interferometry (PSInSAR) calibration. The most popular method for GBSAR atmospheric delay compensation combines polynomial fitting and persistent scatterers targets. However, this method ignores the displacement component of coherent targets, which is impractical. This paper proposes a joint estimation method for ground displacement and atmospheric model parameters.
Article
Environmental Sciences
Meiyu Liu, Bing Xu, Zhiwei Li, Wenxiang Mao, Yan Zhu, Jingxin Hou, Weizheng Liu
Summary: Yunnan Province in China, with its complex topography and frequent landslide disasters, was evaluated using a random forest model based on the average annual deformation rate and other factors. The model achieved an accuracy of 0.80 and an AUC value of 0.87, indicating its reliability and suitability for landslide susceptibility assessment in Yunnan Province.
Article
Geochemistry & Geophysics
Wanji Zheng, Jun Hu, Zhong Lu, Xie Hu, Qian Sun, Jihong Liu, Jianjun Zhu, Zhiwei Li
Summary: Complete and accurate estimation of three-dimensional (3-D) deformations for landslides is challenging, especially for slopes facing north or south. In this study, a topography-constrained strain model is proposed to derive complete 3-D movements by exploiting the spatial relationship of 3-D deformations between neighboring points and assuming surface parallel flow of landslides. The method is tested on both synthetic and real datasets, and the performance of various datasets and the potential of NISAR in deriving time series and 3-D movements are assessed.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Wu LiXin, Lu JingChen, Mao WenFei, Hu Jun, Zhou ZiLong, Li ZhiWei, Qi Yuan, Yao RuBing
Summary: Based on the study of the 2021 Madoi earthquake, it was found that the tectonic stresses on the seismogenic fault and the ground stresses were correlated with the spatial distribution of the earthquake and the locations of surface ruptures. The Madoi earthquake may have only released part of the accumulated stress at the east section of the seismogenic fault. The southeastern part of the Bayan Har block may be a potential seismic hazard zone in the future.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2022)
Article
Geochemistry & Geophysics
Jun Hu, Wenqing Wu, Rong Gui, Zhiwei Li, Jianjun Zhu
Summary: This article proposes a method for the selection of homogeneous pixels using a stacked autoencoder (SAE) network. Based on deep learning image classification, this method shows good performance in the application of multitemporal synthetic aperture radar interferometry (InSAR).
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geosciences, Multidisciplinary
Jihong LIU, Jun HU, Zhiwei LI, Zhangfeng MA, Lixin WU, Weiping JIANG, Guangcai FENG, Jianjun ZHU
Summary: In this study, the three-dimensional coseismic displacements of the earthquake that occurred in Maduo county, Qinghai Province, China were derived using satellite remote sensing data. The results showed that the earthquake was dominated by left-lateral fault slip with a maximum horizontal displacement of up to 2.4 m. The accuracy of the displacement observations was significantly improved using specific methods. In addition, the strain model calculation revealed that the eastern and western parts of the faults experienced more significant strains.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Jiang WeiPing, Xu CaiJun, Li ZhiWei, Wu YanQiang, Tan Kai, Geng JiangHui, Qu ChunYan, Zheng Gang, Wen YangMao, He KeFeng, Zhou XiaoHui, Liu JiHong, Chen ChangYun, Feng GuangCai, Xing TianChen
Summary: In this study, by integrating multiple data sources, the characteristics of pre-seismic deformation and co-seismic rupture of the 2021 Qinghai Madoi earthquake were revealed. The pre-seismic deformation showed accumulated sinistral shear strain in the region before the earthquake, and the co-seismic deformation mainly occurred within 100 km from the fault. The vertical deformation exhibited alternating positive and negative variations. The findings are of great significance for understanding seismic dynamic deformation.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2022)