Article
Geochemistry & Geophysics
D. Marsan, Z. E. Ross
Summary: By analyzing the 2019 Ridgecrest earthquake sequence, researchers found a delayed quiescence in seismic activity triggered by the second mainshock, with the shutdown of aftershocks following a static Coulomb stress model. This suggests that seismic activity dynamics are influenced by structural disorder.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Engineering, Civil
Cexuan Liu, Fengshou Zhang, Quan Wang, Bin Wang, Qi Zhang, Bin Xu
Summary: This study utilized a pseudo-3D geomechanical model to simulate the impact of seasonal injection and extraction activities on earthquakes. The results revealed that the induced earthquake cluster occurred within the area of increased Coulomb failure stress. Furthermore, factors such as the maximum operating pressure, frictional coefficient, and dip angle of the pre-existing fault were found to influence the seismic potential.
Article
Geosciences, Multidisciplinary
Yashan Feng, Xiong Xiomg, Bin Shan, Chengli Liu
Summary: In this study, the impact of the Maduo earthquake on nearby faults and the seismicity rate in the study region for the next decade were estimated. The results suggest increased stress accumulations and higher seismicity rates in certain areas, while reduced stress accumulations and lower seismic hazards in other areas. The probability of an M>=6 earthquake taking place in the study region in the next decade is estimated to be 59%.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Jordan T. Cortez, David D. Oglesby, Christodoulos Kyriakopoulos, Baoning Wu, Kuntal Chaudhuri, Abhijit Ghosh, Roby Douilly
Summary: The study used a 3D finite element method to explore the unusual rupture path of the 2019 Searles Valley earthquake in Southern California, indicating that the rupture path is influenced by fault stresses, burial depths, and hypocenter locations, with implications for fault interactions in Southern California and beyond.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Claudia Sgambato, Joanna P. Faure Walker, Gerald P. Roberts, Zoe K. Mildon, Marco Meschis
Summary: This study examines the Coulomb stress transfer (CST) caused by 30 strong earthquakes on normal faults in Calabria, Italy, since 1509 CE. The researchers model the influence of interseismic loading and compare the results to existing studies. They find that the geometry of fault systems plays a significant role in the stress evolution associated with earthquake recurrence.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Environmental Sciences
Donglin Wu, Chunyan Qu, Dezheng Zhao, Xinjian Shan, Han Chen
Summary: This study investigates seismic activities in Menyuan area of Qinghai Province and reveals the complex fault geometries and tectonic structures in the region. By analyzing observational data and conducting simulation analysis, the study examines the interactions and triggering relationships between different seismic events, providing insights into the seismic potential and hazard in the area.
Article
Environmental Sciences
Bing Zhang, Guochang Xu, Zhiping Lu, Yufang He, Mimi Peng, Xueshang Feng
Summary: In this study, the fault geometry and slip distribution of the Yangbi earthquake were determined by InSAR analysis, revealing a moment magnitude of Mw 6.14 and predominant slip occurring at depths of 3-13 km. The earthquake was triggered by a blind fault parallel to the Weixi-Weishan Fault, causing significant Coulomb stress increase in the region.
Article
Environmental Sciences
Junyi Wang, Lin Ding, Jiankun He, Fulong Cai, Chao Wang, Zongkun Zhang
Summary: On January 8, 2022, a Mw 6.7 earthquake occurred in Menyuan, China, with the epicenter located in the western segment of the Lenglongling fault of the Qilian-Haiyuan fault zone. Satellite images were used to measure surface deformation and inverted to determine the fault models and slip distributions of the 2016 and 2022 Menyuan earthquakes. The results showed that the earthquakes were mainly governed by the activities of the Lenglongling fault, with considerable positive Coulomb failure stress generated by the earthquake sequence.
Article
Environmental Sciences
Jiuyuan Yang, Caijun Xu, Yangmao Wen
Summary: On January 23 and March 25, 2022, two right-lateral strike-slip earthquakes with magnitudes larger than 5.5 occurred near Hala Lake in northeastern Tibet. These two events are the largest since the 1927 Hala Lake earthquake. The lack of surface rupture makes it difficult to determine the seismogenic faults and coseismic rupture behaviors of the two events. However, studying these events can provide valuable insights into the seismic hazard of the region.
Article
Environmental Sciences
Ying Shi, Yongzhe Wang, Yinju Bian
Summary: On 23 February 2023, a 6.8 magnitude earthquake occurred on the border of Tajikistan and Xinjiang China, with controversial source mechanism. By using SAR data from Sentinel-1A satellite, the coseismic deformation was obtained through the two-pass differential interferometric synthetic aperture radar (InSAR) technique. The source model was inverted based on the InSAR results, and the potential Coulomb Failure Stress (CFS) transfer was analyzed. The research suggests that this earthquake ruptured a left-lateral strike-slip fault, with a maximum slip of 1.53 m and a total geodetic moment of 1.99 x 10(19) N·m (Mw 6.83). The earthquake was triggered by the 2015 Mw 7.2 Sarez Earthquake, and it enhances the earthquake hazard on the Sarez-Karakul Fault System and Sarez-Murghab Thrust System due to Coulomb stress loading.
Article
Geochemistry & Geophysics
Jessie L. Vermeer, Mark C. Quigley, Robert M. Langridge, Brendan G. Duffy, Zoe K. Mildon, Manuel-Lukas Diercks
Summary: Plate boundary faulting in New Zealand's South Island involves the transfer of about 50% of slip from the Alpine Fault to the Hope-Kelly Fault system. This study explores the slip-rate contributions of different faults in the Hope-Kelly system and the possible role of static stresses in facilitating slip transfer. Through geomorphic and fault mapping combined with luminescence dating, the slip-rates of the Hope and Kelly faults have been determined. The findings suggest that earthquakes on the central Alpine Fault may trigger ruptures of the Hope-Kelly Faults, but ruptures on the Hope-Kelly Faults reduce stress on the northern Alpine Fault, making ruptures on that fault less likely. This system of stress perturbations provides a mechanism for slip transfer from the central Alpine Fault onto the Hope Fault system.
Article
Geosciences, Multidisciplinary
Yujiang Li, Haoqing Liu, Cheng Yang
Summary: The occurrence of the Luding earthquake in September 2022 filled a seismic gap and transferred stress to surrounding faults. The study shows significant coseismic Coulomb stress increases and a correlation between aftershocks and positive stress change. The Luding earthquake also advanced potential earthquakes in a specific fault zone by approximately 60 years.
GEOMATICS NATURAL HAZARDS & RISK
(2023)
Article
Geochemistry & Geophysics
So Ozawa, Ryosuke Ando, Eric M. Dunham
Summary: Fault bends act as barriers to rupture propagation in earthquakes. A recent study quantifies the probability of rupture termination as a function of the bend angle. By conducting earthquake simulations on a fault with restraining or releasing bends, the researchers reproduce empirical laws and geological observations, and find that restraining and releasing bends have different earthquake cycles. This model can potentially enhance our understanding of nonplanar fault seismogenesis and be applied to hazard assessment.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Dian Kusumawati, David P. Sahara, Sri Widiyantoro, Andri Dian Nugraha, Muzli Muzli, Iswandi Imran, Nanang T. Puspito, Zulfakriza Zulfakriza
Summary: In this study, the fault instability criterion was applied to analyze the mechanism of the 2016 Mw 6.5 Pidie Jaya earthquake and its aftershock distribution, determining Panteraja as the causative fault. It was found that fault plane instability may play a role in seismic events in areas with high ΔCFS values, suggesting a potential influence on earthquake activity in different regions.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Wan Wang, Yunhua Liu, Xiaoran Fan, Chao Ma, Xinjian Shan
Summary: This article examines the surface displacements and fault slip of the Turkiye-Syria doublet earthquakes in 2023 and investigates the triggering relationship and stress transfer between the earthquakes. The results indicate that the coseismic ruptures were predominantly left-lateral strike-slip motions, consistent with the overall westward extrusion of the Anatolian Plate. Furthermore, the Mw 7.8 earthquake had a strong positive causative effect on the Mw 7.6 earthquake and increased seismic hazard in certain regions.
Article
Geochemistry & Geophysics
Efthimios Sokos, Frantisek Gallovic, Christos P. Evangelidis, Anna Serpetsidaki, Vladimir Plicka, Jan Kostelecky, Jiri Zahradnik
SEISMOLOGICAL RESEARCH LETTERS
(2020)
Article
Geochemistry & Geophysics
Jan Premus, Frantisek Gallovic, Ladislav Hanyk, Alice-Agnes Gabriel
SEISMOLOGICAL RESEARCH LETTERS
(2020)
Article
Geochemistry & Geophysics
Giovanni Lanzano, Lucia Luzi, Carlo Cauzzi, Jarek Bienkowski, Dino Bindi, John Clinton, Massimo Cocco, Maria D'Amico, John Douglas, Licia Faenza, Chiara Felicetta, Frantisek Gallovic, Domenico Giardini, Olga-Joan Ktenidou, Valentino Lauciani, Maria Manakou, Alexandru Marmureanu, Emeline Maufroy, Alberto Michelini, Haluk Ozener, Rodolfo Puglia, Rajesh Rupakhety, Emiliano Russo, Mohammad Shahvar, Reinoud Sleeman, Nikolaos Theodoulidis
Summary: This article introduces the ORFEUS coordinated strong-motion seismology services, including the RRSM and ESM databases, and their features and applications. The RRSM focuses on rapid dissemination of earthquake shaking information, while the ESM provides quality-checked waveforms and reviewed earthquake information. Global access and usage of the data is encouraged.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
L'ubica Valentova, Frantisek Gallovic, Sebastien Hok
Summary: Seismologists aim to supplement the lack of near-source data in GMPEs by building a database of dynamic rupture scenarios. Synthetic events are used to simulate ground motions at near-source stations, revealing greater variability at near stations compared to distant ones. Within-event variability is lower for near stations than for distant ones.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Article
Geochemistry & Geophysics
Filip Kostka, Jiri Zahradnik, Efthimios Sokos, Frantisek Gallovic
Summary: A dynamic finite-fault source inversion was conducted for the Mw 6.3 2017 Lesvos earthquake to analyze stress and frictional parameters. By progressively adding constraints, the study compared the contributions of different constraints to resolving various quantities.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Leonardo Colavitti, Giovanni Lanzano, Sara Sgobba, Francesca Pacor, Frantisek Gallovic
Summary: This study provides a statistical overview of rupture directivity based on empirical evidence from a large amount of seismic recordings in Central Italy. The results show that directivity is a band-limited phenomenon with a bandwidth that can extend up to five times the corner frequency.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
V. Plicka, F. Gallovic, J. Zahradnik, A. Serpetsidaki, E. Sokos, N. Vavlas, A. Kiratzi
Summary: The Mw7 Samos earthquake, which occurred on October 30, 2020, was caused by a north-dipping offshore normal fault. It resulted in 118 fatalities, a tsunami, and a co-seismic uplift of 20 to 35 cm on the NW part of Samos Island. Through the analysis of data, a multiple-point source model was used to identify three sequential subevents with a duration of 20 seconds. The study confirms the presence of large slip amplitudes along the entire ruptured area and the up-dip and westward rupture propagation. This earthquake highlights the constant threat posed by normal faults in the basin to coastal areas in Greece and Turkey.
Article
Geochemistry & Geophysics
Jiri Zahradnik, El Madani Aissaoui, Pascal Bernard, Pierre Briole, Simon Bufferal, Louis De Barros, Anne Deschamps, Panagiotis Elias, Christos P. Evangelidis, Ioannis Fountoulakis, Frantisek Gallovic, Vasilis Kapetanidis, George Kaviris, Olga-Joan Ktenidou, Sophie Lambotte, Olivier Lengline, Helene Lyon-Caen, Mark Noble, Vladimir Plicka, Alexis Rigo, Zafeiria Roumelioti, Anna Serpetsidaki, Efthimios Sokos, Nicholas Voulgaris
Summary: Researchers have observed a rare case of shallow rupture in the Corinth rift, where a moderate-to-large earthquake occurred at a relatively shallow depth. The earthquake ruptured two orthogonal fault segments, with the shallow moment release happening on a high-angle normal fault. This study provides valuable insights into earthquake hazards in rift environments.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Multidisciplinary Sciences
Jan Premus, Frantisek Gallovic, Jean-Paul Ampuero
Summary: This study utilized a Bayesian dynamic source inversion method to jointly analyze coseismic and postseismic observations of the 2014 South Napa earthquake, providing insights into how fault stress and friction properties affect the spatial separation between afterslip and coseismic slip, driving deep off-fault aftershocks and influencing rupture shapes.
Article
Geosciences, Multidisciplinary
T. Taufiqurrahman, A. -A. Gabriel, T. Ulrich, L. Valentova, F. Gallovic
Summary: Advances in physics-based earthquake simulations using high-performance computing have provided a better understanding of high-frequency seismic wavefield. However, directly comparing the simulation results with ground motion observations is challenging. In this study, a new approach is proposed to simulate data-fused broadband ground motion synthetics by incorporating multiple factors into the dynamic rupture model. The simulation results show good agreement with observed ground-motion metrics, providing an important avenue for non-ergodic, physics-based seismic hazard assessment.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Astronomy & Astrophysics
Esteban Poveda, Patricia Pedraza, Francisco Velandia, Edwin Mayorga, Vladimir Plicka, Frantisek Gallovic, Jiri Zahradnik
Summary: This study investigates the seismotectonics of the Algeciras fault in Colombia, focusing on an earthquake sequence that occurred in December 2019. The study reveals two different structural styles of the fault, including a duplex-style right-lateral strike-slip and a domino-style system. The findings are significant for understanding the geological structure and seismic activity in the region.
EARTH AND SPACE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Taufiq Taufiqurrahman, Alice-Agnes Gabriel, Duo Li, Thomas Ulrich, Bo Li, Sara Carena, Alessandro Verdecchia, Frantisek Gallovic
Summary: The complexity and challenges of earthquake physics make seismic hazard assessment largely empirical. In this study, we present data-assimilated three-dimensional dynamic rupture models of California's biggest earthquakes in over 20 years. By using supercomputing, we identify the link between two earthquakes and explain various datasets through earthquake physics. Our findings highlight the importance of regional structure, long- and short-term stress, and fault system interactions in understanding earthquake dynamics and delays. We demonstrate that a joint physics-based and data-driven approach can greatly enhance geohazard mitigation in the future.
Article
Geochemistry & Geophysics
Milosz Wcislo, Frantisek Stanek, Frantisek Gallovic, Shaojiang Wu, Ivan Psencik
Summary: This study reports the detection of rupture directivity in an induced microseismic event (Mw ~ 1.2) recorded by a dense surface starlike array during hydraulic fracturing of a shale reservoir in China. The directional and offset dependence of peak frequencies observed can be explained by the effects of rupture directivity and attenuation, allowing for the determination of the event's fault plane orientation. Furthermore, a statistical correction is implemented to the amplitudes, confirming the stability of the inverted source mechanism with a slightly lower, yet unreliable nonshear component.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
F. Gallovic, L. Valentova
Summary: Dynamic rupture modeling is a promising approach for simulating strong ground motion based on physics. However, its application in the frequency range of interest for engineering studies is challenging due to the limitations of existing fault models. In this study, we propose an efficient approach that combines the linear slip-weakening friction model with a small-scale random fractal distribution to generate high-frequency content in ground motions. We demonstrate the effectiveness of the approach using models of the 2016 Amatrice earthquake.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Environmental Sciences
Frantisek Gallovic, Jiri Zahradnik, Vladimir Plicka, Efthimios Sokos, Christos Evangelidis, Ioannis Fountoulakis, Fatih Turhan
COMMUNICATIONS EARTH & ENVIRONMENT
(2020)
