The response of soil chemical properties to seismic events has gained significant attention in recent years due to its potential impact on both the environment and infrastructure. Earthquakes can alter the chemical composition of soils, leading to changes in their mechanical properties, which may subsequently affect the stability of embankments, retaining walls, and other civil infrastructure. This review presents a comprehensive analysis of the chemical changes in soils following earthquake events, with a particular focus on the factors influencing these changes and their implications for engineering applications. The paper examines the underlying mechanisms that govern soil behavior during and after seismic events, including liquefaction, soil consolidation, and contamination from hazardous materials. Furthermore, it highlights the importance of post-earthquake soil chemical analysis in assessing potential hazards, such as the release of harmful substances, and offers recommendations for improving soil management strategies in earthquake-prone regions. By reviewing both experimental studies and field observations, this research aims to provide a deeper understanding of the complex relationship between seismic activity and soil chemistry. The novelty of this review lies in its systematic approach to integrating chemical analysis and seismic impacts on soils, offering valuable insights for engineers, environmental scientists, and policymakers involved in disaster risk management and mitigation. Ultimately, this review serves as a foundational resource for enhancing earthquake-resilient infrastructure in geologically active areas.
This bibliometric analysis aims to examine published articles on anomalies observed in the magnetic field due to earthquakes in fourteen seismically active countries between 1975 and 2024. The data used in this analysis are obtained from the online version of the Scopus database and correspond to 290 publications according to the selection criteria. The bibliometric analysis showed that most of the articles were published in English, with the largest number of publications coming from Japan, China, Türkiye, Indonesia, Mexico, the Philippines, Italy, the Russian Federation, and Chile. Out of the 290 articles reviewed, 28 earthquakes showed changes in 6 parameters. The anomaly of the BH component of the magnetic field accounted for 28% of the total. The change in BZ is 20%, D 18%, ∆F 18%, BX 14%, BY 2%.
LiDAR images of northeastern North Carolina in the southeastern USA revealed a ~60-km-long, E-W-oriented geomorphic lineament that crosses the northern side of the Albemarle embayment, herein named the Roanoke River lineament. It is defined by morphological changes along the Roanoke River valley northeast of Palmyra that are aligned with a gentle ~40-km-long, E-W-oriented, south-facing topographic scarp to the east and an angular stream bend to the west. Based on its oblique orientation relative to the regional ENE-WSW-oriented horizontal compressive stress field, SHmax, and the style of geomorphic anomalies that define the lineament, we interpret the Roanoke River lineament to be the surface expression of a buried sinistral strike-slip fault zone, named herein the Roanoke River fault zone. This proposed fault zone may have formed to accommodate the dilatational change in volume produced by dextral motion across the ~10-km-wide Tar River right-step releasing offset in the dextral East Coast strike-slip fault system (ECFS) beneath the Atlantic Coastal Plain. North of the Roanoke River lineament is the ~55-km-long, WNW-ESE-oriented Corduroy Swamp lineament that coincides with the western Norfolk arch. Based on its oblique orientation relative to SHmax and the geomorphic evidence for uplift along the lineament, we postulate that it is the surface expression of a buried transpressional sinistral strike-slip fault, herein named the Corduroy Swamp fault. The existence of these and other faults interpreted herein could have major implications for the tectonic development of the Albemarle embayment and Norfolk arch along the U.S. Atlantic continental margin.
This study investigates the surface deformation caused by the 28 March 2025 Myanmar earthquake (Mw 7.7) using Interferometric Synthetic Aperture Radar (InSAR) techniques with Sentinel-1 data. The earthquake, occurring along the Sagaing Fault, resulted in significant ground displacement, impacting infrastructure and communities. InSAR analysis reveals detailed deformation patterns, quantified through interferograms, multi-look processing, unwrapped phase data, and displacement maps. Results indicate a rupture zone extending approximately 110 km, with maximum subsidence of -0.82 meters and uplift of 0.18 meters, along the line of sight of satellite (LOS). These findings correlate with observed structural damage and provide insights into the fault's slip distribution. This study demonstrates the effectiveness of InSAR in assessing earthquake-induced deformation, offering valuable data for seismic hazard assessment, disaster response, and long-term resilience planning in this vulnerable region. The integration of satellite-based remote sensing with macroseismic data contributes to a comprehensive understanding of seismic events, supporting improved risk mitigation strategies.
Electrical substations control voltage and the flow of electric energy assuring optimal transmission of electricity from generation plants to users. A detailed performance evaluation of substation’s structures is crucial to take decision regarding demolishing or repairing. To find an efficient assessment strategy, this study a 200 KV substation’s steel structure in China has been analyzed. Structural data and dimensions have been carryout through a holistic site inspection. Different laboratory tests have been conducted to evaluate the materials strength. The finite element method (FEM) has been utilized to develop the structural model, nonlinear static and time-history analysis has been done with STAAD.Pro-2023. To assess the structural safety of the steel structure, necessary factors such as time frequency, mode shape, deflections, and strength capacity ratios were studied. Structural data found from structural analysis as the structures present condition has been compared with its initial conditions and allowable limits. The findings of the study how a 15% reduction in natural frequencies and extended structural periods, indicating material degradation and potential reductions in dynamic resilience. Strength capacity ratio of the steelstructure members found lower than the initial condition.
