Article
Geochemistry & Geophysics
Huiyun Guo, Thorne Lay, Emily E. Brodsky
Summary: There is a correlation between seismological observations and fault system maturity, which can help understand variations in seismic hazard and assess the relative maturity of inaccessible fault systems.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
J. C. Lozos
Summary: This study investigates the conditions under which rupture occurs on two component faults simultaneously in an orthogonal strike-slip fault system through dynamic rupture simulations. The results show that only when slip on the first fault reduces the normal stress on the second fault, or when a stopping phase occurs due to the termination of the first fault at the cross fault, multifault ruptures occur.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
H. Shlomai, D. S. Kammer, M. Adda-Bedia, R. E. Arias, J. Fineberg
Summary: The rupture dynamics of the interface joining two materials under frictional contact is significantly influenced by the mechanical properties of the bulk materials that bound the interface. When the materials are similar, Linear Elastic Fracture Mechanics quantitatively describe the rupture, but when the elastic properties differ, bimaterial coupling effects come into play. The study shows that at low rupture velocities, bimaterial cracks described by LEFM govern the interface rupture, but as velocities increase, bimaterial cracks become unstable at a subsonic critical rupture velocity.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Geochemistry & Geophysics
Federica Paglialunga, Francois X. Passelegue, Nicolas Brantut, Fabian Barras, Mathias Lebihain, Marie Violay
Summary: The potential energy stored around faults during the inter-seismic period is released during earthquakes in the form of radiated energy, frictional dissipation, and fracture energy. The fracture energy is of primary importance in controlling the initiation, propagation, and arrest of seismic rupture. Seismological estimates of fracture energy show a clear dependence on slip, while recent experimental studies suggest fracture energy as a material property independent of seismic slip. Stick-slip experiments were performed to reconcile these observations and show that near-tip weakening controls rupture initiation, while long-tailed weakening enhances slip during propagation.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Editorial Material
Geochemistry & Geophysics
Ze'ev Reches, Jay Fineberg
Summary: Earthquakes are caused by dynamic fractures due to overstresses, not governed by the frictional properties of faults. Frictional interfaces can sustain a wide range of stresses before sliding, generating stress-fields and rupture dynamics. The values of stresses and energy dissipation are determined by fault frictional properties.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Roby Douilly
Summary: Complex fault systems with asymmetric topography have been found in Southern California. Geometrical complexities such as stepovers can influence fault rupture. This study investigates the effect of asymmetric topography on rupture dynamics at stepovers using three different types of topography: flat, positive (mountain), and negative (basin). The results show that topography can have a significant impact on rupture propagation at stepovers, and suggest that topography should be considered in dynamic studies with geometric complexities.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Colin N. Pennington, Takahiko Uchide, Xiaowei Chen
Summary: This study investigates the control of injection, prior seismicity, and fault properties on the rupture growth and propagation of induced earthquakes. The analysis reveals that the slip distribution of the Guthrie M-w 4.0 earthquake is influenced by factors such as low pore pressure changes, static stress changes, and the initial stress distribution and fault strength. Comparisons with other strike-slip events suggest that reactivated faults exhibit different slip distributions compared to active regions, with the initial stress distribution and fault strength being the primary controlling factors. Overall, pore pressure perturbations and earthquake interactions enhance the slip distribution, but the fault's initial stress and strength state ultimately control it.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Hideo Aochi, Sergio Ruiz
Summary: By applying kinematic and dynamic modeling to the 2015 Mw8.3 Illapel, Chile, earthquake, we were able to identify two ruptured patches, with a larger main patch in the north and a smaller patch in the south near the hypocenter. Dynamic rupture models showed that the initial rupture of the small hypocentral patch did not trigger the main patch due to a difference in fracture energy, leading to another nucleation event at depth.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Anita Torabi, John Rudnicki, Behzad Alaei, Giuseppe Buscarnera
Summary: Studying faults is important for various disciplines due to their influence on rock formations' mechanical behavior and hydraulic connectivity. However, the current understanding of fault geometry and growth is limited by traditional fracture mechanics models. Recent advances in non-destructive numerical characterization and Deep Neural Networks enable the extraction of fault geometry and mechanical properties at an unprecedented speed and accuracy, resolving the 3D fault shape and properties in ways that were unthinkable just a decade ago.
EARTH-SCIENCE REVIEWS
(2023)
Article
Engineering, Geological
Dionysios Chatzidakis, Yiannis Tsompanakis, Prodromos N. Psarropoulos
Summary: The study aims to examine the rupture patterns and surface displacements caused by the contemporaneous rupture of a main fault and a perpendicular secondary fault using a three-dimensional numerical model in sandy deposits.
ENGINEERING GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Edward H. Field, Kevin R. Milner, Nicolas Luco
Summary: In this study, the effects of declustering and Poisson assumptions on seismic hazard estimates are evaluated using the UCERF3-ETAS model. The research findings suggest that it is better to keep aftershocks and treat them as a Poisson process rather than removing them from hazard consideration via declustering. The study also highlights the importance of honoring the true time dependence for other hazard and risk metrics.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Lucia Lozano, Juan Cantavella, Beatriz Gaite, Sandra Ruiz-Barajas, Resurreccion Anton, Jaime Barco
Summary: The Santa Fe seismic sequence in 2020-2021 is the first widely felt seismic series in the Granada basin in Spain since 1979. The seismic activity is clustered between the Santa Fe and Pinos Puente faults, with hypocenters at depths between 2 and 5 km.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Shuang-Lan Wu, Atsushi Nozu, Yosuke Nagasaka
Summary: The study aims to accurately simulate seismic fling-step displacements using the DWN method, with recommendations on the imaginary part of the complex frequency and the subfault size for extended sources.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Article
Geochemistry & Geophysics
Joshua C. S. Purba, Hersh Gilbert, Jan Dettmer
Summary: This study assesses seismicity in the southern Rocky Mountain trench through a temporary network of seismometers, identifying active structures and changes in earthquake distribution and style of deformation. It provides insights into the geometry of subsurface faults and their activity level with a catalog of 47 earthquakes, including horizontal and vertical uncertainty quantification. The seismicity observed suggests a transition from transpression to normal faulting along the length of the trench, with repeating events possibly linked to fluid migration.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Yongkang Qiu, Caijun Xu, Zhuohui Xiao, Jianjun Wang
Summary: This study successfully detected more events than the China Earthquake Networks Center (CENC) catalog by relocating aftershocks and using the Match and Locate method. It inferred the rupture fault of the Jinghe earthquake and found the distribution pattern of foreshocks and the activity of the fault during aftershocks.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
L. Scognamiglio, E. Tinti, E. Casarotti, S. Pucci, F. Villani, M. Cocco, F. Magnoni, A. Michelini, D. Dreger
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2018)
Article
Geosciences, Multidisciplinary
Daniele Bailo, Rossana Paciello, Manuela Sbarra, Riccardo Rabissoni, Valerio Vinciarelli, Massimo Cocco
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geochemistry & Geophysics
Marco M. Scuderi, Elisa Tinti, Massimo Cocco, Cristiano Collettini
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(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
Kuvvet Atakan, Massimo Cocco, Beata Orlecka-Sikora, Ronald Pijnenburg, Jan Michalek, Christian Ronnevik, Dorota Olszewska, Beata Gorka-Kostrubiec, Martyn R. Drury
Summary: European Plate Observing System (EPOS) is built upon national research infrastructures for data generation, processing, analysis, and archiving. Thematic core services and centralized integrated core services are responsible for data integration and distribution. The diversity of regulations and procedures adopted in different countries poses challenges for the development of dedicated EPOS consortia.
ANNALS OF GEOPHYSICS
(2022)
Article
Geochemistry & Geophysics
Kauzar Saleh Contell, Karin Karlzen, Massimo Cocco, Helle Annette Pedersen, Kuvvet Atakan, Daniele Bailo, Otto Lange, Daniela Mercurio, Giovanna Maracchia, Agata Sangianantoni, Diana Piras, Maria Fredella, Carmela Freda
Summary: EPOS is a distributed research infrastructure in Europe aiming to ensure sustainable access to solid Earth science data and services, emphasizing the importance of scientific impact and excellence in research for long-term sustainability. The paper discusses the strategic approach and solutions adopted by EPOS ERIC to address long-term sustainability, focusing on governance and financial models.
ANNALS OF GEOPHYSICS
(2022)
Article
Geochemistry & Geophysics
Massimo Cocco, Carmela Freda, Kuvvet Atakan, Daniele Bailo, Kauzar Saleh Contell, Otto Lange, Jan Michalek
Summary: This article introduces the mission and objectives of the European Plate Observing System (EPOS) research infrastructure, as well as the data and tools it provides. EPOS is committed to promoting interdisciplinary and cross-disciplinary research in Earth science, integrating and sharing solid Earth science data through advanced scientific solutions and open access.
ANNALS OF GEOPHYSICS
(2022)
Article
Geochemistry & Geophysics
C. Hanagan, R. A. Bennett, L. Chiaraluce, A. Hughes, M. Cocco
Summary: Static stress transfer is commonly believed to be the primary mechanism for triggering aftershocks, but evaluating this mechanism is subject to observational uncertainties. In this study, we analyze a large dataset of aftershocks following three major earthquakes and find that the resolved failure stress on optimally oriented planes overpredicts the percentage of triggered aftershocks compared to that predicted from observed aftershock rupture planes. Furthermore, observed rupture planes appear to align more closely with pre-existing tectonic structures.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Enrico Balli, Barbara Angioni, Simona Cerrato, Silvia Filosa, Claudio Goffi, Luca Postpischl, Rita Silva, Dorina Stanculescu, Massimo Cocco
Summary: Strategic research communication is gaining increasing recognition in recent years. Research infrastructures need to effectively communicate their scientific research to attract users and influence policy-makers and society. This paper reflects on the experience of developing a communication strategy for the European research infrastructure EPOS and highlights challenges and best practices for successful communication.
ANNALS OF GEOPHYSICS
(2022)
Article
Geochemistry & Geophysics
C. Cornelio, E. Spagnuolo, S. Aretusini, S. Nielsen, F. Passelegue, M. Violay, M. Cocco, G. Di Toro
Summary: During seismic slip, natural faults experience a sudden decrease in shear stress.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
A. Gualandi, D. Faranda, C. Marone, M. Cocco, G. Mengaldo
Summary: We use dynamical system tools to analyze frictional stick-slip events and investigate the underlying dynamics associated with the transition from stable sliding to unstable motion. Our analysis shows that the seismic cycle exhibits characteristics of a low-dimensional system and the local properties of the attractor require a high number of degrees of freedom. We propose that the lab seismic cycle is best explained by a random attractor based on rate- and state-dependent friction.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Luca Malagnini, Douglas S. Dreger, Robert M. Nadeau, Irene Munafo, Massimo Cocco
Summary: The relation between earthquake parameters and seismic moment, as well as their interpretation in terms of self-similarity, is still debated in literature. A study on global earthquake data found that slip and stress drop values calculated based on corner frequency and elastic rebound theory show different scaling relationships, indicating heterogeneity in the rupture process. Additionally, there is a self-affine behavior observed in the relationship between earthquake size and area and stress drop.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Computer Science, Information Systems
Peter Wittenburg, Franciska de Jong, Dieter van Uytvanck, Massimo Cocco, Keith Jeffery, Michael Lautenschlager, Hannes Thiemann, Margareta Hellstroem, Ari Asmi, Petr Holub
Proceedings Paper
Materials Science, Multidisciplinary
Jiaxin Chen, Daniel Jadernas, Fredrik Lindberg, Henrik Pettersson, Martin Bjurman, Kwadwo Kese, Anders Jenssen, Massimo Cocco, Hanna Johansson
PROCEEDINGS OF THE 18TH INTERNATIONAL CONFERENCE ON ENVIRONMENTAL DEGRADATION OF MATERIALS IN NUCLEAR POWER SYSTEMS - WATER REACTORS, VOL 2
(2018)
Proceedings Paper
Materials Science, Multidisciplinary
Martin Bjurman, Daniel Jadernas, Kwadwo Kese, Anders Jenssen, Jiaxin Chen, Massimo Cocco, Hanna Johansson
PROCEEDINGS OF THE 18TH INTERNATIONAL CONFERENCE ON ENVIRONMENTAL DEGRADATION OF MATERIALS IN NUCLEAR POWER SYSTEMS - WATER REACTORS, VOL 2
(2018)
