-
Constraining the slip history of the Katschberg normal fault (Eastern Tauern Window) by thermo-kinematic modeling: Implications for the tectonic evolution of the Eastern European Alps in the late Cenozoic Tectonophysics (IF 2.7) Pub Date : 2024-09-26 Reinhard Wolff, Andreas Wölfler, Andrea Hampel, István Dunkl
The Katschberg normal fault borders the Tauern Window to the east and played a crucial role during Miocene lateral tectonic extrusion in the Eastern European Alps. In this study, we present new cooling ages from low-temperature thermochronology as well as thermo-kinematic models, which constrain the exhumation history of the Penninic units in the footwall of the Katschberg normal fault and its slip
-
Stress heterogeneity in the eastern Tibetan Plateau and implications for the present-day plateau expansion Tectonophysics (IF 2.7) Pub Date : 2024-09-24 Haoqing Liu, Yujiang Li, Cheng Yang, Lianwang Chen
The eastward expansion of the Tibetan Plateau has resulted in different earthquake types in the eastern Tibetan Plateau, but the mechanism remains unclear. Here, we construct a three-dimensional visco-elastoplastic finite element model considering the topography to investigate the influence of fault geometry and rheological heterogeneity on stress fields. In our best-fitting model, the minimum principal
-
The Crust-Mantle Interaction of the Qiangtang Terrane: New evidence from the Effective Elastic Thickness of the Lithosphere Tectonophysics (IF 2.7) Pub Date : 2024-09-20 Qiang Li, Wenna Zhou, Bohu Xu, Yongkang Chan, Hai Tang, Yunmeng Wu
The crust-mantle interaction in the Qiangtang terrane is significant to study continental rheology and evolution. Its mechanism remains a subject of considerable debate for the reason of lack of sufficient geophysical evidence. The effective elastic thickness (Te) of the lithosphere can provide important constraints on this issue because it is sensitive to the state of mechanical coupling between the
-
Spatially-varied crustal deformation indicating seismicity at faults intersection in the SE margin of the Tibetan Plateau: Evidence of S-wave splitting from microseismic identification Tectonophysics (IF 2.7) Pub Date : 2024-09-18 Xinyi Li, Yuan Gao
The Sanjiang Lateral Collision Zone (SLCZ) in the SE margin of the Tibetan Plateau is a special area where several strike-slip faults intersect, resulting in strong deformation and frequent earthquakes. We employ seismic waveforms recorded by a dense temporary broadband array (SJ array) and regional permanent stations to construct more complete microseismic catalogs by the microseismic identification
-
Upper mantle structure beneath the Mongolian region from multimode surface waves: Implications for the western margin of Amurian plate Tectonophysics (IF 2.7) Pub Date : 2024-09-14 Baigalimaa Ganbat, Kazunori Yoshizawa, Demberel Sodnomsambuu, Ulziibat Munkhuu
Multimode phase speeds of surface waves are used to build a new radially anisotropic S wave model in the eastern Eurasian and Mongolian regions. Our dataset includes seismic waveforms of over 1655 teleseismic events (Mw≥5.8) from 2009 to 2021, recorded at permanent and temporary stations in and around Mongolia. The multimode dispersion curves of Love and Rayleigh waves were extracted using the nonlinear
-
Deformation and melt–rock interaction in the upper mantle: Insights from the layered structure of the Horoman peridotite, Japan Tectonophysics (IF 2.7) Pub Date : 2024-09-14 Miki Tasaka, Aya Hihara, Keisuke Kurihara, Hajime Taniuchi, Tatsuhiko Kawamoto
To obtain a better understanding of melt–rock interactions in the upper mantle, microstructural and petrological analyses were conducted on deformed mantle peridotites from the Horoman peridotite complex, Hokkaido, Japan. The Horoman peridotite complex is lithologically heterogeneous and contains various kinds of ultramafic and mafic rocks. We studied an outcrop of 3 × 70 m in size that contains layered
-
Are the Carpathians tectonically active?: Geomechanical study in deep boreholes in the outer Carpathians (Poland) Tectonophysics (IF 2.7) Pub Date : 2024-09-13 Marek Jarosiński, Kinga Bobek, Michał Wojtowicz, Michał Wyglądała, Michał Kępiński
Present-day tectonic stress state was investigated in three deep boreholes located in the eastern segment of the Polish Outer Carpathians (POC). Significant rotations of the maximum horizontal stress (S) were observed in these boreholes, located at the hinge of the anticlines in the upper part of the nappes. For the deepest borehole, D-1 (5.5 km depth), 1D geomechanical modelling was performed to determine
-
Investigation of the 2011 Yingjiang, Yunnan, China Ms. 5.8 Earthquake Sequence: Seismic Migration, Seismogenic Mechanism, and Hazard Implication Tectonophysics (IF 2.7) Pub Date : 2024-09-12 Ke Du, Hongyi Li, Yanzhen Li, Zeyu Ma, Jianshe Lei, Jinzhong Jiang, Zigang Sun
On March 10, 2011, an Ms. 5.8 earthquake struck Yingjiang City, western Yunnan, China, causing destructive damage. Due to the very sparse distribution of seismic stations on the southwestern border of China, its seismogenic structure and mechanism remain controversial. In this study, with the aid of machine-learning-based detection and location workflow and template matching technique, we detect 10
-
Crustal structure of the Bushveld complex, South Africa from 1D shear wave velocity models: Evidence for complex-wide crustal modification Tectonophysics (IF 2.7) Pub Date : 2024-09-03 Kaelie Contreras, Andrew Nyblade, Raymond Durrheim, Susan Webb, Musa Manzi, Islam Fadel
Thirty-nine 1D shear wave velocity profiles, obtained by jointly inverting receiver functions and Rayleigh wave group velocities, are used to investigate the crustal structure of the Bushveld Complex in northern South Africa. Data from teleseismic earthquakes recorded on broadband seismic stations between 1997 and 1999 and 2015–2020 were used to compute P-wave receiver functions. Rayleigh wave group
-
Rate-and-state friction of epidote gouge under hydrothermal conditions and implications for the stability of subducting faults under greenschist metamorphic conditions Tectonophysics (IF 2.7) Pub Date : 2024-09-03 Mengke An, Zhen-Yu Yin, Fengshou Zhang, Rui Huang, Derek Elsworth
Epidote is a common hydrous mineral present in subduction zones subject to greenschist metamorphic conditions – and potentially an important control on the fault stability-instability transition observed under greenschist facies. We explore controls on this transition through shear experiments on simulated epidote gouge at temperatures of 100–500 , effective normal stresses of 100–300 and pore fluid
-
Cascade processes of induced and triggered earthquakes-Case study in the Weiyuan shale gas development area in Sichuan Basin, China Tectonophysics (IF 2.7) Pub Date : 2024-09-03 Guanshen Liu, Renqi Lu, Dengfa He, Wei Tao, Xing Huang, Peng Su, Fang Xu, Weikang Zhang
Identifying accurate seismogenic faults is critical for studying the mechanisms of induced earthquakes. On February 24th and 25th, 2019, three moderate earthquakes with magnitudes of 4.7, 4.3, and 4.9 occurred successively in the shale gas development area of Weiyuan, China. We utilized high-resolution three-dimensional (3D) seismic data to identify two pre-existing faults (F1 and F2) that were responsible
-
High-resolution 3-D lithospheric structure beneath the Qinling-Dabie orogenic belt from joint inversion of receiver functions and ambient noise Tectonophysics (IF 2.7) Pub Date : 2024-09-02 Wei Liu, Yongshun John Chen, Shunping Pei, Zhen Guo, Hanlin Liu, Xiaotian Xue, Jiawei Li, Qian Hua, Lei Li
Resulting from the convergence of the Yangtze and North China Cratons, the Qinling-Dabie orogenic zone (QD) represents an important element in the central China orogenic system. To fully comprehend the craton evolution and lower crustal flow from the Tibetan Plateau, it is important to understand the crust and mantle structure of the QD. We reconstructed the three-dimensional lithospheric structure
-
Complex fault system associated with the Molucca Sea Divergent double subduction zone revealed by the 2019 Mw 6.9 and Mw 7.1 Earthquakes Tectonophysics (IF 2.7) Pub Date : 2024-08-30 Endra Gunawan, Adriano Gualandi, Nicholas Rawlinson, Sri Widiyantoro, Munawar Kholil, Pepen Supendi, Gatot Haryo Pramono, Sidik Tri Wibowo
GNSS (Global Navigation Satellite System) data in northern Sulawesi and western Halmahera reveals a pattern of coseismic displacement that was caused by the 7 July 2019 ( 6.9) and 14 November 2019 ( 7.1) Molucca Sea earthquakes. The coseismic slip of these earthquakes are obtained via inversion on rectangular fault planes of surface GNSS coseismic deformation offsets. The 7 July 2019 earthquake ruptured
-
Present-day stress stratification in the lower Palaeozoic shale sequence of the Baltic Basin, northern Poland, inferred from borehole data Tectonophysics (IF 2.7) Pub Date : 2024-08-29 Marek Jarosiński, Kinga Bobek, Michał Wojtowicz, Radomir Pachytel, Maciej Trzeciak, Alicja Piłacik
We performed an analysis of present-day stress profiles for four wells penetrating the Lower Palaeozoic shale sequence of the Baltic Basin (northern Poland). Breakouts, hydraulic fracturing and leak-off tests were used to calibrate stress models based on anisotropic elastic shale properties. Initial stress models, balancing the lengths of the modelled and observed breakouts, indicated a degradation
-
Crustal-scale architecture and origin of the Haiyuan Arcuate Tectonic Belt, NE Tibet Tectonophysics (IF 2.7) Pub Date : 2024-08-28 Zizhao Yuan, Yanqi Lin, Xiao Xu, Huilin Li, Xiaoyu Guo, Chunsen Li, Xiaofei Tong
The Haiyuan Arcuate Tectonic Belt (HATB) in the northeastern Tibetan Plateau features the interactions of three intersecting blocks: the eastern Qilian Shan, the Alxa Block, and the Ordos Block. While the HATB has displayed active responses to the ongoing collision between the Indian and Eurasian plates, the exact process behind the formation of this arcuate belt remains unclear. In pursuit of further
-
Inference of the Gutenberg-Richter b-value: New insights and results Tectonophysics (IF 2.7) Pub Date : 2024-08-27 Eulogio Pardo-Igúzquiza, Peter A. Dowd
The size-frequency distribution of many geological and geophysical variables, in relation to fractures, faulting and seismicity, is well described by a statistical distribution of the power law type which is characterized by its exponent. For earthquake magnitudes, the exponent is the well-known -parameter of the Gutenberg-Richter scaling law. In this paper we:
-
Fault rock properties and conditions produce variance in slip during earthquake rupture propagation at the Nankai Trough Tectonophysics (IF 2.7) Pub Date : 2024-08-22 Kenichi Tsuda, Tetsuro Hirono
Although drilled samples of fault rocks have yielded information on frictional features of shallow subduction zones, the relationship of rupture propagation to the levels of friction and pore-fluid pressure remains uncertain. To investigate this topic, we performed dynamic rupture simulations along the megasplay fault that slipped during the 1944 M 8.0 Tonankai earthquake in the Nankai Trough. We used
-
Co-seismic and post-seismic slip associated with the 2021 Mw5.9 Arkalochori, Central Crete (Greece) earthquake constrained by geodetic data and aftershocks Tectonophysics (IF 2.7) Pub Date : 2024-08-22 Pavlos Bonatis, Vasileios Karakostas, Jan Kaplon, Eleftheria Papadimitriou, George Kaviris, Maya Ilieva, Michael Foumelis, Christos Pikridas
The co-seismic and post-seismic deformation field associated with the M5.9 Arkalochori main shock that occurred in central Crete (Greece) on 27 September 2021 is analyzed using Copernicus Sentinel-1A & 1B images, GNSS measurements and seismological data. The fault geometry is constrained through the joint inversion of multiple datasets and the slip distribution for the co-seismic and post-seismic period
-
Analysis of stress field in the head area of the Three Gorges Reservoir based on coupled fluid-solid theory Tectonophysics (IF 2.7) Pub Date : 2024-08-22 Yiming Dai, Lili Zhang, Yaowen Zhang, Yunsheng Yao, Renlong Wang
The Three Gorges Reservoir, one of the largest water conservation system in the world, has been of keen interest to scientists globally since its impoundment. After construction of the dam, there has been a significant increase in seismic activity in the head area of the reservoir. It is generally accepted that earthquakes in this region are predominantly caused by the Jiuwanxi and Xiannvshan faults
-
The influence of the strength of pre-existing weak zones on rift geometry and strain localization Tectonophysics (IF 2.7) Pub Date : 2024-08-20 Liang Xue, Robert Moucha, Folarin Kolawole, James D. Muirhead, Christopher A. Scholz
Continental rifts normally initiate within previously deformed lithosphere and thus their evolution and architecture can be largely controlled by inherited weak zones in the pre-rift crust. Here, we quantify the role of the strength and obliquity of pre-existing crustal-scale weak zones in the evolution of continental rift systems. We use a 3D numerical geodynamic model to assess strain localization
-
Unraveling the link between magma and deformation during slow seafloor spreading Tectonophysics (IF 2.7) Pub Date : 2024-08-20 Yanghui Zhao, Weiwei Ding, Gianreto Manatschal, Xiaodong Wei, Hanghang Ding, Zhengyi Tong, Jingyan Zhao
Detachment faulting related to oceanic core complexes (OCCs) has been suggested to be a manifestation of slow seafloor spreading. Although numerical models suggest OCCs form under low magma supply, the specific interaction between magmatism and tectonic faulting remains elusive. This paper examines seismic observations detailing the spatiotemporal interactions between magmatism, high-angle faulting
-
Shaping the crustal structure of the SW-Alpine Foreland: Insights from 3D Geological modeling Tectonophysics (IF 2.7) Pub Date : 2024-08-20 Dorian Bienveignant, Ahmed Nouibat, Christian Sue, Yann Rolland, Stéphane Schwartz, Matthias Bernet, Thierry Dumont, Jérôme Nomade, Séverine Caritg, Andrea Walpersdorf
Reactivation processes play a significative role in the localization of deformation but still remain hard to establish at the lithospheric scale. In this work, we built a 3D structural model, which enables to bridge the gap between the main tectonic structures observed at the surface and the geometry of the major interfaces (the Mohorovičić-discontinuity (hereafter Moho) and top of the basement) inferred
-
Evolution of the transtensional Barreirinhas pull-apart system in the Brazilian Equatorial margin and its correlation with the African conjugate counterpart Tectonophysics (IF 2.7) Pub Date : 2024-08-15 David L. de Castro, Diógenes C. Oliveira, Francisco H.R. Bezerra
The Barreirinhas pull-apart system encompasses marginal basins in divergent and transform margin segments in the central sector of the Brazilian Equatorial Margin and its African conjugate counterpart. This ancient pull-apart system evolved through transtensional strike-slip motion within a highly heterogeneous crystalline basement affected by multiple rift phases. The geometry and development of pull-apart
-
-
Transformational faulting in Mn2GeO4 from olivine to wadsleyite structure: Implications for physical mechanism of deep-focus earthquakes Tectonophysics (IF 2.7) Pub Date : 2024-08-13 Feng Shi, Yanbin Wang, Timothy Officer, Dongdong Yao, Tony Yu, Lupei Zhu, Jianguo Wen, Junfeng Zhang, Zhigang Peng
High-pressure and temperature deformation experiments interfaced with acoustic emission (AE) monitoring have been conducted to study transformational faulting in MnGeO olivine, which transforms to the β phase, isostructural to wadsleyite. Metastable MnGeO olivine exhibits a marked embrittlement behavior at temperatures between 800 and 1100 K, emitting numerous AEs. At each temperature, brittle deformation
-
Teleseismic measurements of Upper Mantle Shear-Wave Anisotropy in Southern Mexico Tectonophysics (IF 2.7) Pub Date : 2024-08-13 Samuel Celis, Luis Vázquez, Raúl W. Valenzuela, Laura Petrescu, Xyoli Pérez-Campos, Gerardo León Soto
The Mexican subduction system is an ideal region to study 3-D mantle deformation patterns in response to changes in slab geometry and the presence of tears. Shear-wave splitting measurements were made using and waves in southern Mexico, where the Cocos slab subducts beneath the North American and western Caribbean plates. For most of southern Mexico, the results are consistent with predominantly trench-normal
-
Machine-learning based location of the 2021 MW 7.4 Maduo, Qinghai, China earthquake sequence: Insight into intraplate seismogenesis Tectonophysics (IF 2.7) Pub Date : 2024-08-13 Penghu Guan, Jianshe Lei, Dapeng Zhao
On 22 May 2021, an 7.4 earthquake occurred in Maduo County, Qinghai Province, China, which is located on the Kunlun Mountain Pass-Jiangcuo fault inside the Bayan Har block, providing a good opportunity to investigate seismogenesis of large intraplate earthquakes. We analyze two years of continuous seismic data from June 2021 to June 2023, which were recorded at 34 portable seismic stations of the MaduoArray
-
Paleolatitude of Mafic Dykes in the Xiugugabu ophiolite: Implications for the intraoceanic Trans-Tethyan subduction zone and multistage India-Eurasia collision Tectonophysics (IF 2.7) Pub Date : 2024-08-12 Xingduo Ma, Xiaodong Tan, Yalin Li, Shuai Li, Zijian Li, Yongyong Jia, Siqi Xiao, Jianbo Cheng
An intraoceanic Trans-Tethyan subduction zone has been identified in both the Kohistan-Ladakh arc and the West Burma Terrane. This has significant implications for the India-Eurasia collision. Concurrently, the dismembered ophiolites within the Yarlung-Tsangpo Suture Zone likely originated from the intraoceanic Trans-Tethyan subduction zone or the Andean-type southern Eurasian continental margin. A
-
Modelling the contrasting tectonic and magmatic evolution of rifted and transform margins and subsequent oceanic spreading Tectonophysics (IF 2.7) Pub Date : 2024-08-08 Attila Balázs, Taras Gerya
The links between tectonics, surface processes and magmatism govern the evolution of rifted and transform margins. Quantifying the control of surface and deep Earth processes, lithosphere rheology and plate kinematics is challenging because of their non-linear interactions. We designed and conducted systematic 3D magmatic-thermo-mechanical numerical experiments coupled with surface processes modelling
-
Magmatic flare-ups in arcs controlled by fluctuations in subduction water flux Tectonophysics (IF 2.7) Pub Date : 2024-08-08 Timothy Chapman, Luke A. Milan, Sabin Zahirovic, Andrew S. Merdith, Geoffrey L. Clarke, Mingdao Sun, Nathan R. Daczko
The tempo of subduction-related magmatic activity over geological time is episodic. Despite intense study and its importance to crustal growth, the fundamental drivers of this episodicity remains unclear. We demonstrate quantitatively a first order relationship between arc flare-up events and high subduction flux. The volume of oceanic lithosphere entering the mantle is the key parameter that regulates
-
Insights into the mechanisms forging seismic anisotropy in the upper mantle beneath India Tectonophysics (IF 2.7) Pub Date : 2024-08-08 Sunil K. Roy, M. Ravi Kumar, Jyotima Kanaujia, Sandeep Gupta, Bhoopendra Singh, Prantik Mandal, D. Srinagesh
We identify possible sources of seismic anisotropy beneath India by synthesizing 2064 well-constrained shear-wave splitting parameters determined from a consistent analysis of waveforms recorded at 357 broadband seismic stations. Our effort includes compilation of previous results, reanalysis of old data, analysis of new data from previous networks and new stations. Our results reveal that the average
-
Restraining bend deformation at the northern termination of the Wadi Araba Fault: Insights from reflection seismic data and focal mechanism solutions Tectonophysics (IF 2.7) Pub Date : 2024-08-08 Mu'ayyad Al Hseinat, Malek AlZidaneen
This study examines subsurface deformation at the northern end of the Wadi Araba Fault (WAF), focusing on the Amman-Hallabat Fault (AHF) and the Wadi Shueib Fault (WSF). While surface evidence shows their tectonic impact from the Late Cretaceous to the present, research on their subsurface structures, contributing to the WAF, is limited. Using seismic data and well report, five seismo-stratigraphic
-
Upper-mantle seismic anisotropy in the southwestern North Island, New Zealand: Implications for regional upper-mantle and slab deformation Tectonophysics (IF 2.7) Pub Date : 2024-08-04 Lingmin Cao, Xiaobo He, Huaiyu Yuan, Minghui Zhao, Xuelin Qiu, Martha K. Savage
We employed shear-wave splitting analysis on both teleseismic and waves, and waves from deep (150–250 km) local earthquakes collected from a dense array with 43 temporary broadband seismic stations and nine long-term seismic stations centered at Mount Taranaki to characterize the upper-mantle dynamics in the southwestern North Island of New Zealand, in areas previously unexamined for shear-wave splitting
-
Fault characteristics in exhumed basement rocks; implications for understanding subsurface basement faults Tectonophysics (IF 2.7) Pub Date : 2024-08-03 Anita Torabi, Behzad Alaei, Adrian Smith
We studied fault core geometry and mechanical properties of exhumed basement rocks at two localities (Storskora and Lislaskora) in Sotra Island, western Norway. We combine outcrop studies with in-situ measurements of the rock stiffness (Young's modulus) to characterize the faults. Faults were investigated both along and across strike using multiple 1D scanlines on the outcrop. Our results show that
-
Microstructures, hydrogen concentrations, and seismic properties of a tectonically exhumed sliver of oceanic mantle lithosphere, Moa Island, Timor-Tanimbar outer-arc, eastern Indonesia Tectonophysics (IF 2.7) Pub Date : 2024-08-03 Sylvie Demouchy, Fabrice Barou, Akira Ishikawa, Emmanuel Gardés, Andréa Tommasi
We characterize and quantify the microstructure, hydrogen concentrations, and seismic properties of a tectonically exhumed sliver of oceanic lithospheric mantle outcropping in the Moa Island (Leti archipelago, Timor-Tanimbar outer-arc). The 18 spinel peridotites (lherzolites and harzburgites) have coarse-porphyroclastic microstructures and olivine crystal-preferred orientations (CPO) with axial-[010]
-
A scaling relationship for the width of secondary deformation around strike-slip faults Tectonophysics (IF 2.7) Pub Date : 2024-08-02 Robert Perrin, Nathaniel Miller, Rachel Lauer, Daniel Brothers
Simple mechanical arguments suggest that slip along interlocked, rough faults, damages surrounding rocks. The same arguments require that the scale of secondary damage is proportional to the size of geometric irregularities along the main fault. This relationship could apply at all scales, but has, so far, been difficult to observe at the 10s to 100 s of km scales of large, natural faults, often because
-
Structural control on the landscape evolution and avulsive behavior of rivers at mountain exits: The example of the Kosi River in eastern Nepal Himalaya Tectonophysics (IF 2.7) Pub Date : 2024-08-02 Manas Mukul, Vinee Srivastava, Malay Mukul
The Kosi River flows from the eastern Nepal Himalaya into the state of Bihar (India) and has experienced frequent avulsions, causing extensive flood-related damage. Because of this avulsive behavior, the Kosi is called the “Sorrow of Bihar.” The avulsion of 2008 was the most catastrophic avulsion event recorded for the Kosi and has been attributed primarily to hydrological and sedimentological processes
-
Estimation of antigorite wave velocities in subduction conditions based on first-principles thermoelasticity Tectonophysics (IF 2.7) Pub Date : 2024-08-02 Mutian Qin, Huilin Xing, Kunpeng Dou, Yuyang Tan, Weichao Yan, Jianchao Wang, Zongwei Jin, Zhongwen Hu
The most abundant serpentine mineral in subduction settings, antigorite has one of the highest water storage capacities and is involved in seismicity. Seismic wave velocities of antigorite are important for detecting and quantifying serpentinization within the mantle wedge and the subducting oceanic plate. At present, the elastic properties of antigorite at high pressures and temperatures are unclear
-
Corrigendum to “The Berkovići (BIH) ML = 6.0 earthquake sequence of 22 April 2022 – seismological and seismotectonic analyses” [Tectonophysics 875 (2024) 230253] Tectonophysics (IF 2.7) Pub Date : 2024-08-01 Iva Dasović, Marijan Herak, Davorka Herak, Helena Latečki, Marin Sečanj, Bruno Tomljenović, Snježana Cvijić-Amulić, Josip Stipčević
-
A physical explanation for an unusually long-duration slow slip event in the Nankai Trough Tectonophysics (IF 2.7) Pub Date : 2024-07-31 Keisuke Ariyoshi, Akira Nagano, Takuya Hasegawa, Takeshi Iinuma, Masaru Nakano, Demian Michael Saffer, Hiroyuki Matsumoto, Shuichiro Yada, Eiichiro Araki, Narumi Takahashi, Takane Hori, Shuichi Kodaira
The Dense Oceanfloor Network System for Earthquakes and Tsunamis (DONET) and the Long Term Borehole Monitoring System (LTBMS), installed above the source region of the 1944 Tonankai earthquake, revealed that crustal deformation is driven by slow slip events (SSEs) in the shallower extension of megathrust earthquakes. However, there are unresolved questions about (A) the duration of the SSE in February
-
Interseismic deformation in the northwestern Sichuan-Yunnan block constrained by Sentinel-1 InSAR and GNSS Tectonophysics (IF 2.7) Pub Date : 2024-07-29 Xiaoxue Xu, Lingyun Ji, Rumeng Guo, Jiangcun Zhou, Liangyu Zhu, Wenting Zhang, Chuanjin Liu
The northwestern Sichuan-Yunnan block (NW SYB), located in the southeastern Tibetan Plateau, is characterized by complex fault systems. Its detailed crustal deformation is crucial to comprehending the kinematics of the Tibetan expansion. In this study, we integrate the Interferometric Synthetic Aperture Radar (InSAR) and Global Navigation Satellite System (GNSS) data to obtain the high-resolution present-day
-
Assessment and optimization of maximum magnitude forecasting models for induced seismicity in enhanced geothermal systems: The Gonghe EGS project in Qinghai, China Tectonophysics (IF 2.7) Pub Date : 2024-07-28 Xinxin Yin, Changsheng Jiang, Fengling Yin, Hongyu Zhai, Yu Zheng, Haidong Wu, Xue Niu, Yan Zhang, Cong Jiang, Jingwei Li
Seismic activity induced during the development of Enhanced Geothermal Systems (EGS) is frequent and poses significant hazards. This study aims to accurately forecast the maximum magnitude (Mmax) of induced earthquakes to effectively manage seismic risks. Focusing on the EGS project in Gonghe County, Qinghai Province, we evaluated and optimized various widely-applied Mmax forecasting models, while
-
A local magnitude scale (ML) for Northern Algeria Tectonophysics (IF 2.7) Pub Date : 2024-07-28 Khaled Roubeche, Fethi Semmane, Issam Abacha, Oualid Boulahia, Sofiane Taki-Eddine Rahmani, El-Mahdi Tikhamarine
This study presents a local magnitude scale (ML) based on the original Richter definition and designed for use within the Algerian Digital Seismic Network (ADSN). The magnitude scale is derived from the analysis of 17,377 zero-peak maximum amplitude traces extracted from the vertical component, simulated as Wood-Anderson seismograms. These traces are taken from a dataset of 1901 earthquakes recorded
-
Crustal and Uppermost Mantle Azimuthal Anisotropy beneath West and SE Brazil using Ambient Seismic Noise Tectonophysics (IF 2.7) Pub Date : 2024-07-25 Taghi Shirzad, Marcelo Assumpção, Eric Debayle, Marcelo Bianchi, Bruno Collaço, Jackson Calhau, Gabriel N. Dragone, Carlos Alberto Moreno Chaves
Seismic azimuthal anisotropy within the crust and upper mantle offers important information of past and present tectonic deformation. We used ambient seismic noise to map azimuthal anisotropy in the lithosphere beneath W and SE Brazil, providing new insights into the amalgamation history of the various cratonic blocks in SW Gondwana, which are now partly buried by Phanerozoic basins. We used 72 stations
-
Monchique alkaline magmatic intrusion (SW Iberia): Geophysical modeling and relationship with active seismicity and hydrothermalism Tectonophysics (IF 2.7) Pub Date : 2024-07-24 Marta Neres, Gabriela Camargo, Analdyne Soares, Susana Custódio, Machiel Bos, Dina Vales, Pedro Terrinha
Monchique is a prominent 902 m topographic high in SW Iberia, which stands out in the general flat landscape of southern Portugal. It lies to the north of the Africa-Eurasia plate boundary, which locally accommodates a slow oblique convergence (∼5 mm/yr). Monchique comprises alkaline magmatic rocks of Late Cretaceous age, intruded in a post-rift context. It hosts the most active seismic cluster in
-
Quantitative estimation of the effective elastic thickness around the Burma Plate and correlation analysis of its influencing factors Tectonophysics (IF 2.7) Pub Date : 2024-07-22 Yawen She, Qian Zhao, Guangyu Fu, Guojie Meng, Layue Li, Myo Thant
The Burma Plate is a microplate that extends along the boundary between the Indian and Eurasian plates. It is characterized by an extraordinarily complex lithospheric tectonic setting, resulting from the continental collision in the north, the oceanic crustal subduction in the south, and the large amount of sediment from the Tibetan Plateau. The lithospheric strength is a key to understanding the tectonic
-
Relocation of the 2018–2022 seismic sequences at the Central Gulf of Corinth: New evidence for north-dipping, low angle faulting Tectonophysics (IF 2.7) Pub Date : 2024-07-22 Vasilis Kapetanidis, Ioannis Spingos, Athanassios Ganas, Antonia Papageorgiou, George Kaviris
The Gulf of Corinth, Central Greece, is a highly active half-graben, characterized by seismicity which is more intense in its western part, while destructive earthquakes have also occurred towards its eastern end. We herein present an analysis of the seismicity in the Central Gulf of Corinth, for the period from June 2018 to December 2022. We applied the EQTransformer machine-learning model to enhance
-
Electrical resistivity structure of the Southeastern part of Bayan Har Block: Insights into the seismogenic environment of 2022 Maerkang earthquake swarm Tectonophysics (IF 2.7) Pub Date : 2024-07-18 Yan Zhan, Xiangyu Sun, Xuehua Liu, Lingqiang Zhao, Dahu Li, Sha Li, Zeyi Dong, Xiaoyu Lou, Chongtao Hao, Yuxin Bao
The Bayan Har block (BHB) is one of the areas with the strongest seismicity in China. Since 1997, six earthquakes with magnitudes of 7 or greater have occurred in this block. The activity of earthquakes has shown a trend of increasing from the edge of the BHB to its interior. In this article, three-dimensional inversion was used to generate the electrical resistivity structure in the Maerkang earthquake
-
Slip-weakening distance and energy partitioning estimated from near-fault recordings during the 2023 Mw 7.8 Türkiye-Syria earthquake Tectonophysics (IF 2.7) Pub Date : 2024-07-17 Zhongqiu He, Zhenguo Zhang, Zijia Wang, Wenqiang Wang
Fault-weakening process governs the earthquake rupture dynamics and energy partitioning and is of great importance for understanding earthquake physics and seismic hazards. The 2023 Mw 7.8 Türkiye-Syria earthquake was well recorded by dense strong motion stations near ruptured faults, providing a rare opportunity to explore parameters controlling the fault-weakening behavior. This work investigates
-
Reappraising the seismogenic potential of a low-strain rate region: Active faulting in the eastern Siena Basin (southern Tuscany, Italy) Tectonophysics (IF 2.7) Pub Date : 2024-07-15 Andrea Brogi, Paola Vannoli, Martina Zucchi, Pierfrancesco Burrato, Umberto Fracassi, Gianluca Valensise, Hsun-Ming Hu, Chuan-Chou Shen
We investigated the active tectonics and earthquake potential of the eastern Siena Basin, a slowly deforming portion of southern Tuscany in the inner Northern Apennines. This region hosts several historical settlements and valuable cultural heritage, but also frequent background seismicity and rare damaging earthquakes in the Mw range 5.0–6.2. We describe in detail an active, capable, and seismogenic
-
Segmented geoelectrical characterization of the Kachchh Mainland Fault (Western India) and significance for seismic Hazard Tectonophysics (IF 2.7) Pub Date : 2024-07-14 Kapil Mohan, Peush Chaudhary, Pruthul Patel, Sumer Chopra
Characterizing seismic sources is crucial for assessing seismic hazards, particularly for active faults like the Kachchh Mainland Fault (KMF), a 150 km long fault in the Kachchh region. The KMF is laterally displaced by transverse faults with different orientations (NW-SE to NE-SW). To better understand the KMF, a joint interpretation of the five North-South trending Magnetotelluric (MT) profiles (two
-
The method and application of numerical simulation of high-precision stress field and quantitative prediction of multiperiod fracture in carbonate reservoir Tectonophysics (IF 2.7) Pub Date : 2024-07-14 Pengyuan Han, Wenlong Ding, Hailong Ma, Debin Yang, Jing Lv, Yuntao Li, Tianshun Liu
Structural fractures in carbonate reservoirs contribute prominently to hydrocarbon migration and accumulation. In this paper, the accuracy of structural fracture prediction is improved by two aspects of numerical simulation of traditional tectonic stress field and fracture distribution prediction methods in carbonate reservoirs. (1) The grid generation of finite element models for geological models
-
Deep crustal structure and deformation features of the northeastern margin of the Tibetan Plateau, as revealed by controlled-source seismic profiling along the Aba-Guyuan-Wuqi transect Tectonophysics (IF 2.7) Pub Date : 2024-07-14 Song Xianghui, Pan Suzhen, Wang Fuyun, Tian Xiaofeng, Liu Baofeng, Song Jiajia
The mechanisms that underlie crustal thickening and deformation along the northeastern margin of the Tibetan Plateau, as well as the interplay among different tectonic blocks and deep extension of the boundary faults, have been the subject of considerable debate. To investigate these issues, NE-oriented controlled-source seismic wide-angle reflection/refraction profiling was performed approximately
-
Regional stress field in the SE margin of the Tibetan Plateau revealed by the focal mechanisms of small and moderate earthquakes Tectonophysics (IF 2.7) Pub Date : 2024-07-11 Peizhen Su, Yan Luo, Li Zhao
In this study, we investigate the stress field in the southeastern margin of the Tibetan Plateau. We first determine the focal mechanism solutions of 1537 small and moderate (3.2 ≤ M ≤ 6.7) regional earthquakes from January 2009 to June 2021, and then use the focal mechanisms to invert for the spatial variation of crustal stress field by a damped linear inversion method. Our result suggests that in
-
Effects of fault roughness on estimating critical slip-weakening distance from fault slip history: A laboratory study Tectonophysics (IF 2.7) Pub Date : 2024-07-10 Peng Dong, Zhengyan Wang, Ying Xu, Kaiwen Xia
Earthquakes are the dynamic rupture of faults governed by fault weakening processes. Critical slip-weakening distance () is a crucial source parameter of earthquakes, and the determination of is of great concern to semiologists. However, determining for natural earthquakes is challenging due to the trade-off in inversed source models. To solve this problem, Fukuyama and his coworkers proposed a simple
-
Vp/Vs structure and Pn anisotropy across the Louisville Ridge, seaward of the Tonga-Kermadec Trench Tectonophysics (IF 2.7) Pub Date : 2024-07-10 Eduardo Contreras-Reyes, Ingo Grevemeyer, Christine Peirce, Sebastián Obando-Orrego
The Pacific Plate within the collision zone between the Louisville Ridge and the Tonga-Kermadec Trench was formed at the Osbourn Trough, a paleo spreading center that became inactive during the Cretaceous. In this region, the trench shallows from a depth of 8–11 km to ∼6 km below sea surface, while the outer rise topography is obscured by Louisville seamounts that rise 4–5 km above the adjacent seafloor
-
Deep crustal fluids and their relation to cutoff depths of crustal earthquakes in the North Ibaraki area of northeastern Japan inferred from reflected S-waves Tectonophysics (IF 2.7) Pub Date : 2024-07-06 Takahiro Shiina, Yuta Amezawa, Haruo Horikawa, Kazutoshi Imanishi, Takahiko Uchide
Crustal fluids play an essential role in the activity of crustal earthquakes. The north Ibaraki area in northeastern Japan has shown intense crustal seismicity after the 2011 Tohoku-oki earthquake. In this area, it is discussed that crustal fluids are supplied from the deep part of the Earth's crust and contribute to the genesis of these crustal earthquakes. To investigate the distribution of crustal
-
Triggered and recurrent slow slip in North Sulawesi, Indonesia Tectonophysics (IF 2.7) Pub Date : 2024-07-06 N. Nijholt, W. Simons, R. Riva, J. Efendi, D. Sarsito, T. Broerse
Nearby faults interact with each other through the exchange of stress. However, the extent of fault interaction is poorly understood. In particular, interactions may lead to slow-slip activity, resulting in episodes of transient surface motion. Our study concentrates on Northwest Sulawesi (Indonesia), which hosts two fault zones with potential for major earthquakes and tsunamis: the strike-slip Palu-Koro
-
Reprocessing and interpretation of legacy seismic data using machine learning from the Granada Basin, Spain Tectonophysics (IF 2.7) Pub Date : 2024-07-06 Carlos José Araque-Pérez, Teresa Teixidó, Flor de Lis Mancilla, José Morales
The Granada Basin (Spain) is a Neogene sedimentary depression with irregular geomorphology and deep depocenters. It is located in the most seismically hazardous part of the Iberian Peninsula with an historically experienced extremely destructive earthquakes, followed by periods of low to moderate seismicity. In 1980s the Chevron Oil Company collected a set of 30 deep seismic reflection sections in
-
The thermal structure of the Colombian lithosphere: A regional and basin-scale analysis Tectonophysics (IF 2.7) Pub Date : 2024-07-06 Harold Buitrago, Florian Neumann, Juan Contreras, Carlos A. Vargas
It is well-established that the thermal state of the lithosphere strongly influences various regional and local geological processes, including crustal deformation, hydrocarbon maturation, hydrogen generation, and geothermal phenomena. Moreover, the thermal structure exhibits high sensitivity to tectonic features, a property of particular significance in Colombia, where three main tectonic plates converge