Academic literature on the topic 'Stepover faults'

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Journal articles on the topic "Stepover faults"

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Wang, Hui, Mian Liu, Benchun Duan, and Jianling Cao. "Rupture Propagation along Stepovers of Strike-Slip Faults: Effects of Initial Stress and Fault Geometry." Bulletin of the Seismological Society of America 110, no. 3 (2020): 1011–24. http://dx.doi.org/10.1785/0120190233.

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ABSTRACT Large earthquakes on strike-slip faults often rupture multiple fault segments by jumping over stepovers. Previous studies, based on field observations or numerical modeling with a homogeneous initial stress field, have suggested that stepovers more than ∼5 km wide would stop the propagation of rupture, but many exceptions have been observed in recent years. Here, we integrate a dynamic rupture model with a long-term fault stress model to explore the effects of background stress perturbation on rupture propagation across stepovers along strike-slip faults. Our long-term fault models si
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Konon, Andrzej, Szymon Ostrowski, Barbara Rybak-Ostrowska, et al. "Mnin restraining stepover – evidence of significant Cretaceous–Cenozoic dextral strike-slip faulting along the Teisseyre-Tornquist Zone?" Acta Geologica Polonica 66, no. 3 (2016): 435–55. http://dx.doi.org/10.1515/agp-2016-0019.

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Abstract A newly recognized Mnin restraining stepover is identified in the Permo-Mesozoic cover of the western part of the Late Palaeozoic Holy Cross Mountains Fold Belt (Poland), within a fault pattern consisting of dextral strike-slip faults. The formation of a large contractional structure at the Late Cretaceous – Cenozoic transition displays the significant role of strike-slip faulting along the western border of the Teisseyre-Tornquist Zone, in the foreland of the Polish part of the Carpathian Orogen. Theoretical relationships between the maximum fault offsets/ mean step length, as well a
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DeLano, Kevin, Jeffrey Lee, Rachelle Roper, and Andrew Calvert. "Dextral, normal, and sinistral faulting across the eastern California shear zone–Mina deflection transition, California-Nevada, USA." Geosphere 15, no. 4 (2019): 1206–39. http://dx.doi.org/10.1130/ges01636.1.

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Abstract Strike-slip faults commonly include extensional and contractional bends and stepovers, whereas rotational stepovers are less common. The Volcanic Tableland, Black Mountain, and River Spring areas (California and Nevada, USA) (hereafter referred to as the VBR region) straddle the transition from the dominantly NW-striking dextral faults that define the northwestern part of the eastern California shear zone into a rotational stepover characterized by dominantly NE-striking sinistral faults that define the southwestern Mina deflection. New detailed geologic mapping, structural studies, a
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Yang, Jiuyuan, Caijun Xu, Yangmao Wen, and Guangyu Xu. "The July 2020 Mw 6.3 Nima Earthquake, Central Tibet: A Shallow Normal-Faulting Event Rupturing in a Stepover Zone." Seismological Research Letters 93, no. 1 (2021): 45–55. http://dx.doi.org/10.1785/0220210057.

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Abstract On 22 July 2020, an Mw 6.3 earthquake with a predominantly normal-faulting mechanism struck the Yibug Caka fault zone, central Tibet, where the overall tectonic environment is characterized by left-lateral strike-slip motion. This event offers a chance to gain insight into the tectonic deformation and the cause of shallow normal-faulting earthquakes in this little studied region. Here, we use Sentinel-1A/B Interferometric Synthetic Aperture Radar data to investigate the coseismic and postseismic deformation related to this earthquake. The earthquake ruptured a previously mapped West Y
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Zhu, Liangyu, Lingyun Ji, Chuanjin Liu, et al. "The 8 January 2022, Menyuan Earthquake in Qinghai, China: A Representative Event in the Qilian–Haiyuan Fault Zone Observed Using Sentinel-1 SAR Images." Remote Sensing 14, no. 23 (2022): 6078. http://dx.doi.org/10.3390/rs14236078.

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On 8 January 2022, a Ms 6.9 earthquake occurred in Menyuan, Qinghai, China. This event provided important geodetic data before and after the earthquake, facilitating the investigation of the slip balance along the seismogenic faults to understand seismogenic behavior and assess seismic risk. In this study, we obtained the interseismic (2016–2021) and coseismic deformation fields of the 2022 earthquake using Sentinel-1 synthetic aperture radar (SAR) images and estimated the slip rate, fault locking, and coseismic slip of the seismogenic faults. The results indicated that the seismogenic fault o
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TUTKUN, Z., and S. PAVLIDES. "Small scale contractional-extensional structures and morphotectonics along the fault traces of Izmit-Cocaeli (Turkey) 1999 earthquake." Bulletin of the Geological Society of Greece 34, no. 1 (2001): 345. http://dx.doi.org/10.12681/bgsg.17033.

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The Mw=7.4 Izmit (Kocaeli) earthquake of August 17, 1999 (Turkey) ruptured 100 km at least surface faults on land along the northwestern branch of the North Anatolian Fault Zone (NAFZ). Although the preexisting structures of NAFZ has been divided into segments, showing stepover and pull apart geometry, the earthquake ruptures are generally linear, E-W striking (N80°-100°), right-lateral. In small scale and on the recent sediments they show very typical strike-slip displacements (2 to 5m), pop-ups and pressure ridges (N 40- 70°), Ρ (N80°), R (N100-1100) and R' (~N350°) Riedel shears, extensiona
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Wen, Guisen, Xingxing Li, Yingwen Zhao, Yong Zhang, Caijun Xu, and Yuxin Zheng. "Kinematic Rupture Process and Its Implication of a Thrust and Strike-Slip Multi-Fault during the 2021 Haiti Earthquake." Remote Sensing 15, no. 7 (2023): 1730. http://dx.doi.org/10.3390/rs15071730.

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A devasting Mw7.2 earthquake struck southern Haiti on 14 August 2021, leading to over 2000 casualties and severe structural failures. This earthquake, which ruptured ~70 km west of the 2010 Mw7.0 event, offers a rare opportunity to probe the mechanical properties of southern Haiti. This study investigates the kinematic multi-fault coseismic rupture process by jointly analyzing teleseismic and interferometric synthetic aperture radar (InSAR) datasets. We determined the optimal dip of different segment faults through finite-fault inversion, and the results show that the dips of the first, second
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Kuşçu, İsmail, Makoto Okamura, Hiromi Matsuoka, Kunio Yamamori, Yasuo Awata, and Selim Özalp. "Recognition of active faults and stepover geometry in Gemlik Bay, Sea of Marmara, NW Turkey." Marine Geology 260, no. 1-4 (2009): 90–101. http://dx.doi.org/10.1016/j.margeo.2009.02.003.

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Wen, Yameng, Daoyang Yuan, Hong Xie, et al. "Typical Fine Structure and Seismogenic Mechanism Analysis of the Surface Rupture of the 2022 Menyuan Mw 6.7 Earthquake." Remote Sensing 15, no. 18 (2023): 4375. http://dx.doi.org/10.3390/rs15184375.

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On 8 January 2022, a seismic event of significant magnitude (Mw 6.7, Ms 6.9) occurred in the northeastern region of the Tibetan Plateau. This earthquake was characterized by left-lateral strike-slip motion, accompanied by a minor reverse movement. The Menyuan earthquake resulted in the formation of two main ruptures and one secondary rupture. These ruptures were marked by a left-lateral step zone that extended over a distance of 1 km between the main ruptures. The length of the rupture zones was approximately 37 km. The surface rupture zone exhibited various features, including left-lateral of
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Weidman, Luke, Jillian M. Maloney, and Thomas K. Rockwell. "Geotechnical data synthesis for GIS-based analysis of fault zone geometry and hazard in an urban environment." Geosphere 15, no. 6 (2019): 1999–2017. http://dx.doi.org/10.1130/ges02098.1.

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Abstract Many fault zones trend through developed urban areas where their geomorphic expression is unclear, making it difficult to study fault zone details and assess seismic hazard. One example is the Holocene-active Rose Canyon fault zone, a strike-slip fault with potential to produce a M6.9 earthquake, which traverses the city of San Diego, California (USA). Several strands trend through densely populated areas, including downtown. Much of the developed environment in San Diego predates aerial imagery, making assessment of the natural landscape difficult. To comply with regulations on devel
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Dissertations / Theses on the topic "Stepover faults"

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Flores, Cuba Joseph M. "Earthquake rupture around stepovers in a brittle damage medium." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS301.pdf.

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Les systèmes de failles décrochantes sont constitués d’une variété de complexités géométriques telles que des branchements de failles, des plis et des zones de relais. En particulier, la présence d’une structure de relais peut fortement déterminer la taille finale de la rupture sismique. Ainsi, comprendre la dynamique d’une rupture à travers une telle complexité est crucial pour l’évaluation des risques sismiques. Quelques études ont examiné cette question dans le contexte d’un milieu élastique linéaire. Cependant, lors d’un séisme, des zones d’endommagement sont générées, notamment aux extrém
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Rosandich, Brooks. "Extension of a Quaternary-Active Shear Zone across the Reelfoot Fault Stepover Arm: Evidence from P- and SH-wave Seismic Reflection Imaging." UKnowledge, 2019. https://uknowledge.uky.edu/ees_etds/79.

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Many seismic hazard source parameters such as slip rate, total displacement, strain accommodation, geographic fault location, etc. are poorly constrained in the New Madrid seismic zone (NMSZ). This is in large part due to the masking effect of the thick Mississippi embayment sediment package on seismogenic structures and features. Consequently, much of the subsurface geologic characterization needed for understanding seismic hazard sources requires geophysical imaging. Recent seismic reflection surveys 12 km NE of the Reelfoot Fault stepover arm of the NMSZ have suggested a northeast-oriented
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Book chapters on the topic "Stepover faults"

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Micklethwaite, Steven, Arianne Ford, Walter Witt, and Heather A. Sheldon. "Transient permeability in fault stepovers and rapid rates of orogenic gold deposit formation." In Crustal Permeability. John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119166573.ch20.

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Conference papers on the topic "Stepover faults"

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Im, Kyungjae, Jean-Philippe Avouac, Taeho Kim, and Linxuan Li. "Simulating Induced Earthquakes in Complex Fault Systems." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-1235.

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ABSTRACT: Much progress has recently been made in the development of stress-based models for forecasting induced earthquakes. Models based on a point-source representation of earthquake nucleation can already be used to estimate seismicity rates. Forecasting magnitudes with stress-based models remains a challenge that requires taking fault finite size and network geometry into account. Quake-DFN, an open-source earthquake simulator, was developed to address this challenge. It allows simulating sequences of earthquakes in a 3-D Discrete Fault Network governed by rate and state friction, a pheno
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Unruh, Jeffery R., Francis C. Monastero, and Egill Hauksson. "ANATOMY OF A RELEASING STEPOVER BETWEEN THE AIRPORT LAKE FAULT AND THE OWENS VALLEY FAULT THROUGH THE COSO RANGE, CALIFORNIA." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-342035.

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Dvory, N. Z., J. D. McLennan, and B. J. McPherson. "Optimizing Hydraulic Fracturing in the Paradox Formation: Geomechanical Study of the Cane Creek Play." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-1158.

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ABSTRACT: The Cane Creek Play, known for its potential in unconventional tight oil extraction, presents drilling challenges. This study revisits its viability in modern horizontal drilling techniques, focusing on the interplay between hydraulic fracturing, stress states, and existing fractures/faults. While historical views emphasize the role of natural fractures in productivity, our results indicate that their stimulation may not be inherently linked to well output. The planar fracture modeling approach adopted here advances our understanding by providing a granular view of the shear potentia
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