Article
Geochemistry & Geophysics
Rong Zhao, Jing Xue, Kai Deng
Summary: Abnormal seismic activities near reservoirs are strongly correlated with the water filling history. These seismic activities are caused by changes in crustal pore pressure and stress due to water impounded behind the dams. This study presents a numerical investigation of the seismicity rate evolution of reservoir-induced earthquakes using a fully coupled 2-D poroelastic model. The results show that shallow earthquakes are mainly caused by pore pressure increase, while poroelastic stress transfer dominates at depth. The temporal evolution of reservoir-induced earthquakes is primarily controlled by tectonic environment.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Maria Kozlowska, Mateusz Jamroz, Dorota Olszewska
Summary: Mining-induced seismic events can lead to aftershocks, and studies have shown that events producing large aftershock sequences may share similar focal mechanisms and have larger ground effects, but there may be potential differences in stress drops. This highlights the importance of further analyzing the focal mechanisms of strong events and their relationship to the exploitation technique.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Kai Zhao, Xiaoyun Wang, Yongcun Feng, Wei Gao, Wenjie Song, Liangbin Dou, Hailong Jiang
Summary: Due to the complexity of the fault activation mechanism in hot dry rock injection and production, a thermal-hydraulic-mechanical coupling mathematical model is established to evaluate the fault activation risk. The results show that the risk of fault activation increases with greater well spacing and injection flow, and with lower reservoir permeability and higher initial reservoir temperature. Different fault occurrences lead to different risks of fault activation. These findings are important for the safe and efficient development of hot dry rock reservoirs.
Article
Geosciences, Multidisciplinary
Tom Kettlety, J. Michael Kendall, Diana C. Roman
Summary: Estimating the volume of intruded magma is crucial for predicting volcanic activity. Geodetic modeling is a useful tool for providing these estimates, but it has limitations in submarine and highly vegetated areas. This study explores the use of seismic moment release estimates as a complementary approach. By comparing the moment-volume scaling of several volcanic earthquake sequences and injection-induced seismicity, the researchers find a notable similarity in scaling within the volcanic sequences. This suggests a distinctive geological condition for volcanoes compared to induced seismicity settings, and the possibility of estimating intruded volume without geodetic information.
GEOPHYSICAL RESEARCH LETTERS
(2022)
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
Tao Bai, Pejman Tahmasebi
Summary: This study introduces an attention-based long short-term memory fully convolutional network (LSTM-FCN) model to improve the accuracy of earthquake event detection and localization. The model combines the parallel structure of FCN and LSTM to extract different features and merge them for classification. Experimental results show a significant improvement in accuracy in classifying earthquake events and a higher resolution in locating them.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Engineering, Geological
Xiaoxi Zhao, Birendra Jha
Summary: This study focuses on mitigating the hazard of fault reactivation during CO2 injection and oil production, analyzing the evolution of Coulomb Failure Stress in different scenarios through high-resolution simulations and theories. The research results can help explain and clarify observed issues related to fault stability, and provide information for predicting fluid flow-induced slip and mitigating seismic hazard.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
Article
Geochemistry & Geophysics
Laure Duboeuf, Louis De Barros, Maria Kakurina, Yves Guglielmi, Frederic Cappa, Benoit Valley
Summary: Experimental observations show that seismic activity occurs on existing natural fractures and bedding planes during fluid injections, with significant local stress perturbations. Moreover, stress perturbations induced by aseismic deformation dominate the triggering of seismic activity.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
K. W. Chang, H. Yoon
Summary: By integrating coupled hydro-mechanical modeling approach with geomechanical analysis, a better assessment of induced seismicity from subsurface energy activities can be achieved, leading to the update of operational conditions for mitigating earthquake risk.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Thystere Matondo Bantidi
Summary: Earthquake hazard assessment is the first step towards reducing the risk of seismic disasters. This study provides a comprehensive analysis of present-day seismicity in Africa and investigates the impact of previous earthquakes on the probability of future events. The results suggest a high likelihood of future earthquakes in the study region, and highlight the importance of considering uncertainties in the assessment of conditional probabilities.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Farnaz Bayat, Milad Kowsari, Benedikt Halldorsson
Summary: This study proposes a new 3-D finite-fault model of the Southwest Iceland bookshelf transform zone. The model is calibrated on the basis of first principles and constrained by the salient features of the fault system geometry. By subdividing the seismogenic potential along the zone into six distinct zones, the model provides a comprehensive assessment of seismic risk.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Luc Illien, Christoph Sens-Schoenfelder, Kuan-Yu Ke
Summary: Ground shaking induced by earthquakes can cause transient changes in seismic velocity, which are important for post-seismic hazard mitigation. However, these changes occur at small timescales and amplitudes that are challenging to link to laboratory experiments. This study investigates whether the estimation of relative seismic velocity changes can be improved using colocated stations according to the ergodic hypothesis.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Computer Science, Interdisciplinary Applications
Xiaoxi Zhao, Birendra Jha
Summary: This study presents a computational framework to understand the impact of plastic deformation on induced fault slip events. Results show that a poroplastic reservoir exhibits larger vertical deformation and delayed slip compared to a poroelastic reservoir, and a reservoir with a smaller modulus than the caprock displays a larger vertical displacement and an earlier onset of both plastic failure and fault slip.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Jan Limbeck, Kevin Bisdom, Fabian Lanz, Timothy Park, Eduardo Barbaro, Stephen Bourne, Franz Kiraly, Stijn Bierman, Chris Harris, Keimpe Nevenzeel, Taco den Bezemer, Jan van Elk
Summary: This study investigates induced seismicity in the Groningen gas field in the Netherlands due to ongoing depletion, using machine learning techniques to predict seismic activity rates. By combining rock mechanical experiments and physical-statistical models, it is found that seismic forecasts generated by Support Vector Machines outperform baselines significantly.
COMPUTATIONAL GEOSCIENCES
(2021)
Article
Geochemistry & Geophysics
Thibault Candela, Maarten Pluymaekers, Jean-Paul Ampuero, Jan-Diederik Van Wees, Loes Buijze, Brecht Wassing, Sander Osinga, Niels Grobbe, Annemarie G. Muntendam-Bos
Summary: This study investigates the induced seismicity in the Groningen gas field in the Netherlands, and reveals contrasting spatio-temporal patterns between the central area and the southwest area. By analyzing the stress development on faults and the frictional response of the faults to induced stresses, the study provides insights into the two main factors controlling the induced seismicity. The findings suggest that spatial heterogeneity in stress development and fault frictional response are both crucial in explaining the spatial variability of induced seismicity rates.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Brittany A. Erickson, Junle Jiang, Valere Lambert, Sylvain D. Barbot, Mohamed Abdelmeguid, Martin Almquist, Jean-Paul Ampuero, Ryosuke Ando, Camilla Cattania, Alexandre Chen, Luca Dal Zilio, Shuai Deng, Eric M. Dunham, Ahmed E. Elbanna, Alice-Agnes Gabriel, Tobias W. Harvey, Yihe Huang, Yoshihiro Kaneko, Jeremy E. Kozdon, Nadia Lapusta, Duo Li, Meng Li, Chao Liang, Yajing Liu, So Ozawa, Andrea Perez-Silva, Casper Pranger, Paul Segall, Yudong Sun, Prithvi Thakur, Carsten Uphoff, Ylona van Dinther, Yuyun Yang
Summary: Numerical modeling of earthquake dynamics requires credible and reproducible model results. The SEAS initiative aims to facilitate code comparisons and advance physics-based earthquake models. New benchmark problems have been used to explore physical ingredients and numerical considerations in earthquake modeling.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2023)
Article
Geochemistry & Geophysics
Martin Vallee, Yuqing Xie, Raphael Grandin, Juan Carlos Villegas-Lanza, Jean-Mathieu Nocquet, Sandro Vaca, Lingsen Meng, Jean Paul Ampuero, Patricia Mothes, Paul Jarrin, Ciro Sierra Farfan, Frederique Rolandone
Summary: The 2019/05/26 Northern Peru earthquake (Mw = 8) exhibited a peculiar space-time rupture process, with a main northward propagation and a reactivation phase of the hypocentral area. The analysis using different imaging techniques provided consistent results.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Correction
Geochemistry & Geophysics
Elif Oral, Peyman Ayoubi, Jean Paul Ampuero, Domniki Asimaki, Luis Fabian Bonilla
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geosciences, Multidisciplinary
O. Lengline, J. P. Ampuero, J. Schmittbuhl
Summary: Some observations of repeating earthquakes show an anomalous scaling between seismic moment and corner frequency, which is related to rupture size. It is still unclear what controls this non self-similarity of ruptures and how it is linked to the frictional stability of the interface.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Peng Dong, Kaiwen Xia, Ying Xu, Derek Elsworth, Jean-Paul Ampuero
Summary: Earthquakes are destructive natural hazards whose damage capacity is determined by rupture speeds. Traditional dynamic rupture models predict that earthquakes accelerate gradually to the Rayleigh wave speed, with some of them reaching stable supershear speeds. However, the 2018 Palu earthquake challenges this viewpoint by demonstrating subRayleigh or supershear propagation speeds immediately after nucleation. Laboratory experiments on shear ruptures and self-similar analysis confirm this observation, leading to a model where rupture speed is solely dependent on driving load. These findings explain various field observations on earthquake speeds.
NATURE COMMUNICATIONS
(2023)
Article
Geosciences, Multidisciplinary
Manon Verberne, Kay Koster, Aris Lourens, Jan Gunnink, Thibault Candela, Peter A. Fokker
Summary: This research aims to identify the shallow causes of anthropogenically induced subsidence in a reclaimed and urbanized coastal plain. The study area of Almere in the Netherlands, known for its fast subsidence, utilized Interferometric Synthetic Aperture Radar (InSAR) data, groundwater and lithoclass models, and construction details database. The results show that the shrinkage of surficial clay beds due to phreatic groundwater level lowering is the main cause of subsidence, with an average contribution of 6 mm per year. A physics-based model predicts that a 1 m drop in phreatic groundwater level will result in 10 mm of subsidence in the next 5 years. Groundwater deficiency during severe dry periods should also be considered as a subsidence accelerator. A consistent monitoring strategy of the phreatic groundwater level is recommended to ensure accurate estimation of subsidence.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Astronomy & Astrophysics
Daniel Mata Flores, Anthony Sladen, Jean-Paul Ampuero, E. Diego Mercerat, Diane Rivet
Summary: The potential of distributed acoustic sensing (DAS) to monitor deep-sea currents along suspended sections of underwater fiber optic cables undergoing vortex-induced vibrations (VIV) is explored. The DAS records oscillations of a seafloor fiber optic cable, which are used to derive ocean current speed time series at 2,390 m depth. The results demonstrate the capability of DAS to monitor a wide range of oceanography processes at depths that are not well-studied with current instrumentation.
EARTH AND SPACE SCIENCE
(2023)
Editorial Material
Environmental Sciences
Luca Dal Zilio, Jean-Paul Ampuero
Summary: The doublet earthquake in Turkey and Syria on 6 February 2023 has caused a great human tragedy and is hard to comprehend. While scientists are studying the seismic event, its catastrophic impact highlights the increased risk in the entire region.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geography, Physical
Gery Herbozo, Jean-Paul Ampuero
Summary: This study analyzes vertical tectonics and mass wasting activity along the Central Peruvian coast, finding a connection between a small island and a large-scale slope failure, which may be the surface expression of subducted relief. The study also suggests a spatial association between the Central Peruvian coast and the Nazca Ridge, which may be related to crustal deformation and seismic activity.
Article
Geochemistry & Geophysics
Alister Trabattoni, Francesco Biagioli, Claudio Strumia, Martijn van den Ende, Francesco Scotto di Uccio, Gaetano Festa, Diane Rivet, Anthony Sladen, Jean Paul Ampuero, Jean-Philippe Metaxian, Eleonore Stutzmann
Summary: Distributed acoustic sensing (DAS) has become a well-established technology in seismology, but its strain data cannot be readily applied to conventional seismological tools. This study proposes a strategy based on deformation to convert strain rate measurements to particle motion, and demonstrates its effectiveness through theoretical analysis and real data comparisons.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Computer Science, Artificial Intelligence
Martijn van den Ende, Itzhak Lior, Jean-Paul Ampuero, Anthony Sladen, Andre Ferrari, Cedric Richard
Summary: Fiber-optic distributed acoustic sensing (DAS) is a versatile technology for vibration measurements with applications in various seismic signal analysis. It can turn fiber-optic cables into seismic arrays, enabling measurements in inaccessible environments. However, handling different types of noise in these new environments poses challenges for traditional data analysis workflows. In this work, we propose a deep learning approach to remove spatially incoherent noise without any assumptions and demonstrate its excellent performance on synthetic and real-world DAS data.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Geochemistry & Geophysics
G. Arias, Q. Bletery, A. Licciardi, K. Juhel, J. P. Ampuero, B. Rouet-Leduc
Summary: The recently identified Prompt Elasto-Gravity Signals (PEGS), generated by large earthquakes, propagate at the speed of light and are sensitive to the earthquake magnitude and focal mechanism. PEGSNet, a deep learning model, is used to evaluate the real-time estimation of the magnitude of big earthquakes in the tsunamigenic zone of Chile. The results show that PEGSNet could estimate the magnitude of the 2010 M-w 8.8 Maule earthquake to be above 8.7 within 90 seconds.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Pablo Lara, Quentin Bletery, Jean-Paul Ampuero, Adolfo Inza, Hernando Tavera
Summary: Ensemble Earthquake Early Warning System (E3WS) is a system that utilizes Machine Learning algorithms to detect, locate, and estimate the magnitude of earthquakes using P-wave recordings from a single station. With high accuracy and agility, the system provides timely earthquake alerts, allowing for potential protective actions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Environmental Sciences
Liuwei Xu, Saeed Mohanna, Lingsen Meng, Chen Ji, Jean-Paul Ampuero, Zhang Yunjun, Masooma Hasnain, Risheng Chu, Cunren Liang
Summary: On February 6, 2023, consecutive earthquakes with magnitudes of Mw7.8 and Mw7.5 occurred on the East Anatolian Fault and Narli Fault. Through the analysis of various seismic data and techniques, the kinematic characteristics of the ruptures were revealed, and the existence of a suprecycle was discovered.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Itzhak Lior, Diane Rivet, Jean-Paul Ampuero, Anthony Sladen, Sergio Barrientos, Rodrigo Sanchez-Olavarria, German Alberto Villarroel Opazo, Jose Antonio Bustamante Prado
Summary: Earthquake early warning (EEW) systems provide seconds to tens of seconds of warning time before potentially-damaging ground motions are felt. We propose a novel approach of using distributed acoustic sensing (DAS) on optical fiber infrastructure for EEW. By converting DAS strain measurements to ground motions and estimating magnitudes and shaking intensities, DAS-based EEW shows significant time-gains compared to standard sensors, especially for offshore earthquakes.
SCIENTIFIC REPORTS
(2023)