Article
Geochemistry & Geophysics
Laura Graziani, Andrea Rovida, Andrea Tertulliani
Summary: The macroseismic source parameters of historical seismic sequences are influenced by cumulative damage effects and uncertainties in the source data. Tests on two seismic sequences in central Italy show that cumulative effects can cause biases in intensity assessments, affecting the computed magnitude and epicentral locations. To reduce bias, a procedure called cumulative intensity subtraction (CIS) is proposed, which excludes heavily damaged areas from intensity distributions used for parameter estimation. The CIS approach provides accurate locations for one sequence and a range of plausible solutions for another when considering intensity uncertainties.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Engineering, Geological
Joaquin Garcia-Suarez, Elnaz Seylabi, Domniki Asimaki
Summary: This study examines the impact of soil inhomogeneity on seismic response, finding that the inhomogeneity factor plays a secondary role in many cases. It suggests straightforward guidelines for simplifying the problem, leading to elementary scaling relations that reveal and explain the fundamental traits of the dynamic behavior of these systems.
Article
Geochemistry & Geophysics
Giovanni Lanzano, Chiara Felicetta, Francesca Pacor, Daniele Spallarossa, Paola Traversa
Summary: In this article, the authors apply the reference-rock identification method to the Italian accelerometric archive and obtain a list of reference rock sites and a corrective factor model. The corrective factor can scale the ground-motion spectra and has a significant effect at high frequencies.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Thomas P. Ferrand, Stefan Nielsen, Loic Labrousse, Alexandre Schubnel
Summary: Pseudotachylytes are formed by the solidification of frictional melt during earthquakes, with their thickness scaling with relative displacement until a bend occurs near 1 mm slip and 100 µm thickness. The growth of melt thickness is primarily influenced by the rate of shear heating, which tends to decay as D-1/2 to D-1. The thickness of pseudotachylytes correlates with moment magnitude and can be used to estimate magnitude on fossil faults in the absence of displacement markers.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Multidisciplinary Sciences
Satoshi Ide, Gregory C. Beroza
Summary: The scaling law for slow earthquakes, proposed 15 years ago, has been subject to debate on the differences between slow and fast earthquakes. New observations show that the linear scaling of slow earthquakes remains valid, but with an upper bound on moment rate of -1013 Nm/s. This suggests that the proposed scaling should be seen as a speed limit for slow earthquakes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Luigi Passarelli, Paul Antony Selvadurai, Eleonora Rivalta, Sigurjon Jonsson
Summary: The study shows that slow slip events (SSEs) can lead to aseismic strain release along with seismic tremor and earthquake swarms. Larger SSEs tend to last longer and are associated with more intense tremor activity. There is a correlation between aseismic and seismic moment release, with shallower SSEs producing larger seismic moment release than deeper SSEs.
Article
Geosciences, Multidisciplinary
Arpan Shastri, Santosh Kumar
Summary: This study analyzes seismic data from the mainland Gujarat region in India and develops scaling laws, providing a basis for seismic hazard assessment and earthquake scenario development in the area.
GEOMATICS NATURAL HAZARDS & RISK
(2022)
Article
Engineering, Civil
Jorge Ruiz-Garcia, Roberto N. Olvera, Ariel D. Frias
Summary: The study shows that multi-story school buildings experience larger inter-story drift demands at the ground level, potentially leading to weak first-story mechanisms under mainshock ground motions; additionally, aftershocks increase damage at the ground level, especially in captive RC columns.
Article
Engineering, Civil
Francesca Gori, Marino Domenico Barberio
Summary: A research team in Italy found hydrogeochemical anomalies such as an increase in dissolved CO2 and a decrease in pH prior to earthquakes, which then returned to typical levels. This suggests the presence of a potential pre-seismic geochemical process in fractured carbonate aquifers.
JOURNAL OF HYDROLOGY
(2022)
Article
Geochemistry & Geophysics
Mohamed S. Abdalzaher, Sayed S. R. Moustafa, H. E. Abdel Hafiez, Walid Farid Ahmed
Summary: The research focused on the contamination of seismic activity catalog in the northeastern part of Egypt, proposing an efficient machine learning model to decontaminate the database and properly differentiate between earthquakes and quarry blasts. The study achieved 100% discrimination between the two types of events using the extreme gradient boosting (XGB) model.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geosciences, Multidisciplinary
Parisa Shokouhi, Vrushali Girkar, Jacques Riviere, Srisharan Shreedharan, Chris Marone, C. Lee Giles, Daniel Kifer
Summary: Small changes in seismic wave properties can indicate impending frictional failure in laboratory experiments and seismic faults. Deep learning models accurately predict the timing and size of laboratory earthquakes based on wave features, showing potential for seismic hazard assessment and warning. The models developed in this study demonstrate good transferability to unseen datasets, reducing the training time and data required for model development.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Geological
Giovanni Forte, Luca Verrucci, Anita Di Giulio, Melania De Falco, Paolo Tommasi, Giuseppe Lanzo, Kevin W. Franke, Antonio Santo
Summary: The 2016 Italian seismic sequence was characterized by three main shocks, with the strongest being a Mw 6.5 event triggering numerous seismic events and observed landslides.
ENGINEERING GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Heng Luo, Teng Wang, Shengji Wei
Summary: Earthquake source parameters are crucial for understanding earthquake physics and crustal fault properties. However, due to trade-offs between parameters and a lack of accurate velocity models and near-field seismic stations, there are significant uncertainties in these parameters in seismic catalogs. In this study, Interferometric Synthetic Aperture Radar (InSAR) images are used to derive source solutions of 33 moderate-size earthquakes in western China, resulting in improved resolution of earthquake source parameters.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Qing-Yu Wang, Michel Campillo, Florent Brenguier, Albanne Lecointre, Tetsuya Takeda, Keisuke Yoshida
Summary: Using ambient-noise-based seismic monitoring, we detected an anomalous seismic velocity decrease in Honshu about one year after the 2011 Tohoku-Oki earthquake, suggesting a possible relation to volcanic processes and internal physical changes. Tiltmeter observations revealed temporal variations correlated with velocity changes, supporting the hypothesis of actual physical deformation in the crust. The observed decrease in fault strength and concurrent increase in low-frequency events in the volcanic area further indicate changes in physical properties and an increase in pore pressure in the upper crust.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Environmental Sciences
Dario Buttitta, Giorgio Capasso, Michele Paternoster, Marino Domenico Barberio, Francesca Gori, Marco Petitta, Matteo Picozzi, Antonio Caracausi
Summary: This study focuses on analyzing the fluids in the Irpinia region, a seismically active zone in Southern Italy, to determine their characteristics and circulation patterns. By using isotopic geochemistry and the carbon-helium system, the study explores how deep processes can alter the chemistry of these natural fluids. The results show the release of mantle-derived He and significant emissions of deep-sourced CO2 in the region, indicating the need to understand gas-water-rock interactions and their impact on fluid chemistry.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
G. Bressan, M. Ponton, G. Rossi, S. Urban
JOURNAL OF SEISMOLOGY
(2016)
Correction
Geochemistry & Geophysics
Denis Sandron, Giovanni Francesco Gentile, Stefania Gentili, Angela Sarao, Alessandro Rebez, Marco Santulin, Dario Slejko
SEISMOLOGICAL RESEARCH LETTERS
(2017)
Article
Geochemistry & Geophysics
G. Bressan, C. Barnaba, S. Gentili, G. Rossi
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2017)
Article
Geochemistry & Geophysics
S. Gentili, R. Di Giovambattista
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2017)
Article
Geochemistry & Geophysics
S. Gentili, R. Di Giovambattista, A. Peresan
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2017)
Article
Geochemistry & Geophysics
Gianni Bressan, Carla Barnaba, Andrea Magrin, Giuliana Rossi
JOURNAL OF SEISMOLOGY
(2018)
Article
Geochemistry & Geophysics
Antonella Peresan, Stefania Gentili
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2018)
Article
Geochemistry & Geophysics
Gianni Bressan, Carla Barnaba, Pierluigi Bragato, Maurizio Ponton, Andrea Restivo
JOURNAL OF SEISMOLOGY
(2018)
Article
Geochemistry & Geophysics
Stefania Gentili, Antonella Peresan, Mohammad Talebi, Mehdi Zare, Rita Di Giovambattista
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2019)
Article
Geochemistry & Geophysics
S. Gentili, R. Di Giovambattista
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2020)
Editorial Material
Chemistry, Multidisciplinary
Stefania Gentili, Rita Di Giovambattista, Robert Shcherbakov, Filippos Vallianatos
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Eleni-Apostolia Anyfadi, Stefania Gentili, Piero Brondi, Filippos Vallianatos
Summary: Aftershocks of earthquakes can cause destruction to urban infrastructures and worsen the damage to weaker structures. It is important to forecast the probability of stronger earthquakes to mitigate their impact. This study applied the NESTORE machine learning approach to Greek seismicity, using region-dependent training to classify clusters into two types and achieved successful results in predicting aftershocks 6 hours after the mainshock.
Article
Geochemistry & Geophysics
Stefania Gentili, Piero Brondi, Rita Di Giovambattista
Summary: This article introduces the first publicly available version of NESTOREv1.0 software, designed for statistical analysis of earthquake clusters. The software uses the NESTORE algorithm to forecast strong aftershocks starting from the first hours after the mainshocks. By analyzing an earthquake catalog, the software identifies clusters and trains the algorithm on them to provide probability estimates for subsequent large earthquakes.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
A. Peresan, S. Gentili
BOLLETTINO DI GEOFISICA TEORICA ED APPLICATA
(2020)