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 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%.

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.

The Air-Cooled Condenser (ACC) structure is one of the pivotal industrial buildings in Combined-Cycled Power Plants. This structure functions as a condenser of water steam, which is conveyed to it through the steam turbine generators, and accumulates the produced water and returns it to the plant’s main water circulation system. While the overall behavior of ACCs under earthquake is fairly known, important details such as the seismic response modification coefficient, R, have been a matter of controversy among the involved engineers. To address these ambiguities and in order to conduct a sure design, a more precise investigation of seismic behavior and response of these structures was deemed to be in demand. Answering this want, a numerical program was created in OpenSees numerical modeling platform to generate models for ACCs of different types, dimensions, and mechanical properties. The numerical results obtained from the analysis, especially for concrete ACCs, for whom investigation of their behaviour was thought to be more necessary, accorded well with the expected seismic behaviour foreseen for these buildings.

Bangladesh, a low-lying riverine nation in South Asia, faces significant vulnerability to natural disasters due to its geographic position at the confluence of the Ganges (Padma), Brahmaputra (Jamuna), and Meghna Rivers. Its proximity to the Bay of Bengal further heightens the risk of frequent tropical cyclones, particularly during the monsoon season. The increasing severity of these events is compounded by climate change. This study assesses the current state of cyclone shelters in two disaster-prone districts, Barguna and Bhola, focusing on their architectural and structural adequacy. It identifies key challenges related to their functionality, highlights deficiencies in disaster preparedness, and evaluates design and construction aspects. The findings provide insights into existing limitations and propose strategic improvements to enhance the resilience and effectiveness of these shelters. Additionally, the study outlines areas for future research to strengthen disaster management initiatives.

Electrical substations control voltage and the flow of electric energy, assuring optimal electricity transmission from generation plants to users. A detailed performance evaluation of the substation's structures is crucial to deciding whether to demolish or repair. This study analyzed a 200 KV substation's steel structure in China to find an efficient assessment strategy. Structural data and dimensions have been carried out through a holistic site inspection. Different laboratory tests have been conducted to evaluate the material's strength. The finite element method (FEM) has been utilized to develop the structural model, and 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 was found from structural analysis, and the Structure's present condition was compared with its initial conditions and allowable limits. The study's findings show a 15% reduction in natural frequencies and extended structural periods, indicating material degradation and potential reductions in dynamic resilience. The strength capacity ratio of the steel structure members was lower than the initial condition.

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 review paper examines the potential for earthquake-induced liquefaction in reclaimed urban areas, with a focus on Dhaka City as a case study. Rapid urbanization and land reclamation in Dhaka have increased concerns about the stability of reclaimed lands during seismic events. This paper synthesizes findings from prior studies, focusing on geotechnical parameters such as SPT-N values, cone tip resistance, local friction, and friction ratio. Key influencing factors, including peak ground acceleration, earthquake magnitude, soil type, and reclamation methods, are analyzed to assess their role in liquefaction susceptibility. Evidence suggests that areas reclaimed with dredged soil, especially at shallow to moderate depths, are more prone to liquefaction under seismic loading. Variability in parameters such as over-consolidation ratio, lateral earth pressure, and internal friction angle highlights the need for localized investigations. This review emphasizes the importance of integrating advanced geotechnical techniques and seismic risk assessments to ensure the resilience of reclaimed urban areas.

Bridges are one of the most important elements of the transportation system in all countries. The collapse of a bridge or the time required for the repair of a damaged bridge can lead to traffic disruption and relief operation suspension that in turn results in the increased earthquake cascading tertiary effects. Therefore, reducing the vulnerability of bridges has always been the focus of engineers. The use of shape memory alloys (SMA) is one of the new solutions that have been presented and received attention in this field. The purpose of this research is to investigate the effects of using SMAs on the seismic behavior of straight box deck concrete bridges. For this purpose, a typical box deck concrete bridge is considered, and in the area of the plastic hinges of the bridge piers, the longitudinal steel bars are replaced with nickel-titanium SMA bars. The studied bridge is analyzed in two cases with and without the use of SMA under the effect of 3 categories of acceleration time histories, consisting of 120 strong ground motion records. Finally, the fragility curves for the maximum drift ratio and residual drift ratio values are calculated. The results show that the use of nickel-titanium SMA bars increases the maximum drift ratios and reduces the residual drift ratios. In this way, the permanent deformations will be decreased.