Article
Geochemistry & Geophysics
J. Wang, T. Tanimoto
Summary: One of the main sources of seismic noise at low frequencies is atmospheric pressure variation, and it can be used to estimate near-surface shear-modulus structure. By inverting for elastic moduli using sensitivity kernels, the Vs30 values of 744 stations were estimated and compared with geological maps.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Shao-Jinn Chin, Rupert Sutherland, Martha K. Savage, John Townend, Julien Collot, Bernard Pelletier, Olivier Monge, Finnigan Illsley-Kemp
Summary: We used a network of seismometers near Noumea, the capital city of New Caledonia, to record and analyze earthquakes for 14 months. The earthquakes in southern New Caledonia are smaller but more hazardous due to their shallow depths and proximity to local communities. Our study highlights the need for long-term monitoring of local earthquakes in this region and suggests that current models overestimate the hazard from large earthquakes in nearby subduction zones. Further research is needed to improve ground motion prediction in subduction zone footwall settings.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Sreevalsa Kolathayar
Summary: This paper reviews historical and recent seismicity in Delhi and updates the seismic hazard map integrated with ward-wise classified population data. It highlights the importance of population density and building types in assessing earthquake risk. Utilizing state-of-the-art techniques, the study analyzes seismic hazard in Delhi based on the latest earthquake information within a 300 km radius.
Article
Geochemistry & Geophysics
Hongguang Ji, Dongsheng Chen, Xiaobo Su, Zhen Fu, Daolu Quan
Summary: Mining-induced earthquake is a common risk factor in mining engineering safety. This study analyzed the spatial multifractal characteristics and magnitude-frequency distribution of mine seismicity based on microseismic monitoring data from Huating Coal Mine. The results showed that mine seismicity exhibits obvious spatial multifractal characteristics and follows the Gutenberg-Richter law under high tectonic stress. The fractal dimension and b value are positively correlated, and the spatial distribution of mine seismicity is related to the magnitude-frequency distribution.
Article
Geochemistry & Geophysics
Mauricio Reyes Canales, Javad Yusifbayov, Mirko van der Baan
Summary: This study generates short-term seismic hazard maps for the province of Alberta, Canada, from 2011 through 2020, using the Monte Carlo simulation approach. The maps reveal spatio-temporal variations in earthquake recurrence parameters and provide a valuable tool for quantifying the short-term evolution in seismic hazard.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Florin Pavel, Saman Yaghmaei-Sabegh
Summary: This study empirically assesses the control period T-C for intermediate-depth earthquakes. A ground motion database of 700 recordings from 25 seismic events in Romania and other sources worldwide is used. An empirical model is proposed for evaluating the control period T-C, with the main variability attributed to intra-event factors. The comparison between seismic hazard results obtained from the proposed empirical model and the Eurocode 8 draft procedure show that T-C values obtained in this study are larger.
Article
Geochemistry & Geophysics
Nitin Sharma, Vincenzo Convertito, Raffaella De Matteis, Paolo Capuano
Summary: This study aims to develop ground-motion prediction equations (GMPEs) specifically for induced earthquakes in the St. Gallen geothermal area, Switzerland. The data analysis includes 343 earthquakes, and GMPEs are inferred using a two-phase approach. The comparison with GMPEs from other regions highlights the importance of using region-specific GMPEs for accurate assessment of induced seismic hazards.
JOURNAL OF GEOPHYSICS AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Darrick Evensen, Adam Varley, Lorraine Whitmarsh, Patrick Devine-Wright, Jen Dickie, Phil Bartie, Hazel Napier, Ilaria Mosca, Colin Foad, Stacia Ryder
Summary: There is low support for changing regulations on induced seismicity in the UK. The framing and provision of information have little influence on public perceptions, except for the type of activity causing the seismic events.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Geological
Ali Fallah Yeznabad, Sheri Molnar, M. Hesham El Naggar
Summary: Greater Vancouver faces the highest seismic risk in Canada, requiring a probabilistic approach to assess earthquake-induced landslide hazards. By considering uncertainties in seismic parameters and seismic displacement prediction models, probabilistic displacements can be determined to better assess geological hazard risks.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Tinggai Chang, Baohua Li, Xinxiang Zeng
Summary: This study analyzed and compared reservoir-induced earthquakes in China, specifically focusing on the Xiluodu hydropower station. The findings confirmed the validity of predictive models and provided valuable insights for studying the mechanisms and predicting the hazard zones of reservoir-induced seismicity.
EARTHQUAKE SCIENCE
(2022)
Review
Computer Science, Information Systems
Mohammad Ghasemi, Sadra Karimzadeh, Masashi Matsuoka, Bakhtiar Feizizadeh
Summary: This study used the scenario building method to investigate the potential damage and casualties if the major earthquakes of 1721 and 1780 were to occur in 2021. Results showed that the 1721 earthquake caused significant destruction in the north of Tabriz, while the 1780 earthquake resulted in less damage.
ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION
(2021)
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
Engineering, Civil
Iason Grigoratos, Paolo Bazzurro, Ellen Rathje, Alexandros Savvaidis
Summary: This article examines the seismic hazard and risk in Oklahoma, with a probabilistic assessment showing the incompatibility of regional seismic provisions with current seismicity. During the peak seismic activity in 2015, seismic risk significantly increased, with the majority of losses originating from damages to nonstructural elements and contents.
EARTHQUAKE SPECTRA
(2021)
Article
Engineering, Industrial
Francesca Celano, Matjaz Dolsek
Summary: This paper explores the coexistence of industrial facilities and urban centres resulting from the rapid growth of the built environment, as well as the impact of multi-hazard domino effects on fatality risk. By decomposing the problem into sub-problems and utilizing simplified probabilistic models coupled with the Monte Carlo method, the study focuses on the significant underestimation of fatality risk in industrialized urban areas when multi-hazard domino effects are disregarded. The importance of accounting for these effects is highlighted, with potential for improvement through enhanced models by different engineering teams.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2021)
Article
Engineering, Geological
Rezvan Ghasemi Nejad, Rahim Ali Abbaspour, Masoud Mojarab
Summary: This study connected seismic events to faults using a fuzzy particle swarm optimization algorithm, achieving a high accuracy rate when determining the associated fault and providing solid support for seismic hazard analysis.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)