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Publications related to Seismic Hazard (10,000)
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Poster
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I am happy to invite you to contribute an original research paper to an upcoming Special Issue on the "Seismic Hazard Assessment and Earthquake Risk Mitigation". Seismic hazard assessment is the international standard practice for the optimized earthquake-resistant design of structures and mitigation of seismic risk. Its importance has increased si...
Article
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This study developed an evolutionary algorithm, called the telescopic evolutionary algorithm (TEA), for the inversion of the spectral ratio of the horizontal to vertical components of strong motions (eHVSR), based on the diffuse-field concept. We verified the TEA using synthetic eHVSR curves from the literature and examined its convergence stabilit...
Article
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The collision between the Indian and Eurasian plates formed the 2 500 km long Himalayan orogenic belt. At 22:09 on August 15, 1950, Beijing time, an MS8.6 earthquake occurred in Medog-Zayu area in the eastern Himalayan syntaxis, which is the largest continental earthquake in the world ever recorded since the historical earthquake records have becom...
Article
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The Aravalli-Delhi Fold Belt (ADFB) is one of three prominent ridges on the continental part of the Indian plate extending northward from central India and subducting beneath the Himalayan arc. Though it is seismogenic along its entire NE-SW structural trend, activity varies spatially with a noteworthy region of higher seismicity in the vicinity of...
Article
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The wide dissemination of earth-based structures as contemporary, vernacular or heritage constructions in regions with important seismic hazard demands the design of solutions that improve the typical low structural performance resulting from intrinsic material limitations. Only in this way, it is possible to promote a comprehensive seismic protect...
Article
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Liquefaction is of major concern in many countries subjected to seismic hazard. In practice, prediction of liquefaction is performed using simplified methods based on in situ tests such as the standard penetration test (SPT) or the cone penetration test (CPT). For some applications such as large projects (tunnels, high rise buildings), the Ménard p...
Article
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Fault barriers are key structures for studying seismic hazard in regions of intense brittle deformation. The interaction between fault sets affects their seismogenic behavior, if some of them act as barriers. The Granada Basin, in the Betic Cordillera, is a region affected by shallow brittle deformation, as it was the scenario for the recent Granad...
Preprint
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This article presents updated seismic hazard curves, maps, and spectra of ground motion intensity parameters for the northern region of the Dominican Republic (DR) obtained using a probabilistic seismic hazard analysis (PSHA). The analysis uses as input data an earthquake recurrence model based on fault slip rates derived from GPS measurements publ...
Article
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Seismic networks provide data that are used as basis both for public safety decisions and for scientific research. Their configuration affects the data completeness, which in turn, critically affects several seismological scientific targets (e.g., earthquake prediction, seismic hazard...). In this context, a key aspect is how to map earthquakes den...
Article
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Earthquakes and slow‐slip events interact, however, detailed studies investigating their interplay are still limited. We generate the highest resolution microseismicity catalog to date for the northern Armutlu Peninsula in a ∼1‐year period to perform a detailed seismicity distribution analysis and correlate the results with a local, geodetically ob...
Article
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Plain Language Summary National Aeronautics and Space Administration prepares for a long‐term human and robotic Artemis missions to the lunar south pole. In this study, we determined whether the Artemis candidate landing regions near the south pole is safe from the seismic hazard that may potentially originate from the lobate scarps (thrust faults)...
Presentation
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Since the dawn of the modern science of earthquakes, a clear split has risen among theoretical and statistical seismology and tectonics. Classical seismology explains what happens during a few seconds of fault slip following rock breakdown, with the consequent radiation of seismic waves, while statistical seismology describes how seismicity occurs...
Conference Paper
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Resilience of a community is often assessed using a swoosh-shaped curve that presents the evolution of post-disaster community functionality during the recovery process. Community resilience goals are then defined as reaching a certain community functionality level after a certain time period following the disaster. We present a risk-informed tool...
Conference Paper
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Seismic analyses embankment dams and levees depend on many important factors in order to reliably predict expected performance. The main factors for reliable forward seismic analyses include (1) seismic hazards evaluation, (2) characterization of subsurface conditions, (3) foundation and embankment characterization and materials parametrization to...
Article
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Plain Language Summary Markedly asymmetric interseismic deformation is observed across the Altyn Tagh fault, revealing differing lithospheric rheology across the fault between northern Tibet and the Tarim Basin. We invoke a 2‐dimensional viscoelastic deformation model to interpret the GPS velocity field across the central Altyn Tagh fault and find...
Article
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In 2019, the San Calixto Observatory published the explanatory report on the probabilistic seismic hazard analysis of Bolivia; in which seismic hazard maps were obtained for return periods of 475 years and 2475 years, uniform hazard curves, uniform hazard spectra and disaggregation. Consequently, in 2020, the current Bolivian Seismic Design Guide w...
Poster
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The stability state of fault systems is mainly controlled by the frictional properties of weak interfaces and the available energy accumulated in the volumes beside them. Heterogeneities, roughness, and topological features play a key role in driving seismic dynamics and tectonic stress dissipation. However, the physics of the processes fostering m...
Article
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The probabilistic seismic hazard analysis (PSHA) method is effectively used in an earthquake risk probability evaluation in seismogenic regions with active faults. In this study, by focusing on the potential seismic source area in Najin Lhasa, southern Tibet, and by incorporating the PSHA method, we determined the seismic activity parameters and di...
Conference Paper
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An approach for preliminary seismic risk assessment is presented for portfolios of cultural heritage assets of classical antiquity. As an example, three ancient columns are considered, located at different sites throughout Attica: The Temple of Aphaia in Aegina, the Temple of Olympian Zeus in the centre of Athens, and the Temple of Poseidon in Soun...
Conference Paper
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In Italy, seismic ground motion intensity for structural design relies on probabilistic seismic hazard analysis (PSHA). Research has shown that, even in the case of a moderate magnitude earthquake, it is expected that ground motion intensities larger than the design counterparts are observed at some sites in the epicentral region. The area where su...
Poster
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The releasing stepover in San Diego Bay is characterized by a pull-apart basin geometry between the southern termination of the Rose Canyon fault around downtown San Diego and the Descanso fault offshore along the USA-Mexico coastline. Although the step between these two strike-slip faults is considered too large for through-going rupture, the comp...
Article
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Many widely used models amount to an elaborate means of making up numbers—but once a number has been produced, it tends to be taken seriously and its source (the model) is rarely examined carefully. Many widely used models have little connection to the real-world phenomena they purport to explain. Common steps in modeling to support policy decision...
Article
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We investigate induced seismicity associated with a hydraulic stimulation campaign performed in 2020 in the 5.8 km deep geothermal OTN‐2 well near Helsinki, Finland as part of the St1 Deep Heat project. A total of 2,875 m³ of fresh water was injected during 16 days at well‐head pressures <70 MPa and with flow rates between 400 and 1,000 L/min. The...
Conference Paper
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The early identification of areas of high seismic risk remains one of the most important tools for the design and implementation of risk mitigation strategies. Current seismic risk assessment measures predominantly rely on having separated models for seismic hazard, exposure and vulnerability, which are then combined following a probabilistic or ev...
Article
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The development of site- and path-specific (i.e., non-ergodic) ground-motion models (GMMs) can drastically improve the accuracy of probabilistic seismic hazard analyses (PSHAs). The varying coefficient model (VCM) is a novel technique for developing non-ergodic GMMs, which puts epistemic uncertainty into spatially varying coefficients. The coeffici...
Conference Paper
Full-text available
Site specific seismic hazard assessment needs a ground motion amplification model of the investigated region. This model allows to highlight areas that can be strongly affected by earthquake ground motion, which is a crucial information for earthquake mitigation. Site response can be investigated by using technique such as standard spectral ratio,...
Conference Paper
Full-text available
Earthquake site effects have a major impact on the seismic hazard. However, evaluating the site response over a broad frequency range and with a high spatial resolution remains difficult. Empirical site effect assessment has shown good reliability up to high frequencies but relies on earthquake recordings, which requires long station deployments. I...
Conference Paper
Full-text available
In local seismic hazard studies, a first step is to have a precise local determination of the parameters of shallow soil layers which are very important input data in order to determine the local response under various seismic scenarios. The results will determine the local variability of the soil package down to a level that may induce significant...
Conference Paper
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The Earthquake Early Warning (EEW) and Structural Health Monitoring (SHM) systems can significantly contribute to seismic risk mitigation in regions with high seismic hazard. Romania, a country periodically affected by strong earthquakes with magnitude > 7.0 occurring in the the Vrancea intermediate-depth seismic zone benefits from both systems. Fo...
Conference Paper
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Induced seismicity represents a significant obstacle to the development of various industrial projects associated with energy production from the subsurface. To effectively mitigate the associated seismic hazard, a better understanding of the physical mechanisms of induced seismicity is required. Within this context, the efficient modelling of the...
Presentation
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Seismic hazard assessment in Menton Topographical site effect zoning considering a semi-empirical approach and a Machine Learning scheme
Article
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The seismicity in the SE Iberian Peninsula is distributed parallel to the coast in a well-developed strike-slip fracture system known as the Eastern Betic Shear Zone (EBSZ). This work focuses on the characterization of the shallow subsurface structure of the Algezares-Casas Nuevas Fault, within the Carrascoy Fault System of the EBSZ. The Carrascoy...
Article
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Conventional probabilistic seismic hazard analysis (PSHA) only considers mainshock events and uses a time‐independent earthquake rupture forecast to describe the occurrence of mainshocks. This approach neglects the long‐term time‐dependency of mainshocks on specific fault segments, the interaction of adjacent faults, and the spatial and temporal cl...
Conference Paper
Full-text available
Many studies demonstrate the powerful influence of soil properties in the damage produced by earthquakes. For this reason, the characterization of the subsoil is indispensable in seismic hazard studies. In this sense, the analysis of data obtained from seismic noise array measurements provides a good estimation of Rayleigh wave dispersion curves. T...
Conference Paper
Full-text available
Probabilistic Seismic Hazard Analysis (PSHA) encompasses quantitative estimation of seismic hazard at a site by considering all plausible earthquake scenarios using different models and assumptions. The outcome of a PSHA is often reported as the mean rate of exceeding a specific ground motion intensity measure at a given site, as well as the unifor...
Conference Paper
Full-text available
The paper presents the way in which two displacement-based design procedures can be applied to design reinforced concrete structures in Romania. The entire country is exposed to seismic hazard, especially the eastern and southern parts of the country, which are primarily affected by Vrancea intermediate-depth seismic source. Using a ground motion p...
Article
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The city of Hualien in eastern Taiwan is located at the junction of the Luzon arc–Eurasian continent collision and the oblique subduction of the Philippine Sea plate along the Ryukyu Trench. This complex tectonic setting creates one of the most intense seismic hazards in the world. Since the mid-twentieth century, three earthquake sequences (1951,...
Conference Paper
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Even if earthquakes occur as time-space clusters, classical probabilistic seismic hazard analysis (PSHA) typically considers only the largest-magnitude event within each cluster; i.e., the mainshocks. This implies assuming that the earthquakes, preceding and following the mainshock in each sequence, that is, foreshocks and aftershocks, respectively...
Article
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To avoid over-reliance on the identification of building damage states post-earthquake in the seismic risk assessment process, an ontology-based holistic and probabilistic framework is proposed here for seismic risk prediction of buildings with various purposes and different damage states. Based on vulnerability analysis, the seismic risk probabili...
Conference Paper
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The presence of topography influences the seismic ground motion and may result in strong amplifications, generally at the top of hills and reliefs. The increasing urbanization of hills requires an accurate estimation of these effects even in areas of moderate seismicity. The simplified coefficients provided by the Eurocodes8 do not depend on the fr...
Article
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Seismic catalogue preparation is one of the important steps of probabilistic seismic hazard assessment (PSHA). Catalogue preparation includes homogenization and declustering as the main stem of pre-processing followed by a completeness check to arrive at the recurrence relation. Homogenization is the process of converting the events reported with d...
Chapter
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The subducting process of Nazca plate beneath the South American tectonic plate governs the seismicity at the Andes region, making it one of the world’s most active seismic regions. The subduction and collision of the aseismic Carnegie Ridge (CR), and the segmentation and drift of the continental North-Andean Block (NAB) with an intricate system of...
Article
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Stepovers have been widely suggested to be important structural boundaries that control earthquake rupture extent and therefore the size of earthquakes. Previous studies suggested that ~4-5 km wide stepovers are likely to arrest fault rupture. However, recent earthquake cases show that even much wider stepovers (e.g., ≥7-8 km wide) sometimes may no...
Article
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The availability of high-resolution digital elevation models (DEM) and advancements in geospatial techniques enable a more accurate measure of slope position classes and classification of landforms using algorithms like topographic position index (TPI). In this study, TPI-based slope position classes are used for the identification of major relief...
Article
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The 2021 Mw 7.4 Maduo earthquake occurred on the left-lateral Kunlun Pass-Jiangcuo fault (KPJF) located within the Bayan Har block, Tibetan Plateau, caused an ~165-km-long surface rupture and widespread ground deformation. This earthquake was well recorded by SAR images and our near-field GPS network during the coseismic and postseismic periods, pr...
Article
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In the last five centuries, Portugal was affected by several earthquakes of strong magnitude (M > 7) that caused widespread destruction and a significant death toll. Due to the geographical distribution of moderate-to-strong magnitude events along the Tagus Valley and Southwest of the country, an earthquake early warning system might potentially pr...
Conference Paper
Full-text available
Italy is characterised by a wide cultural heritage distributed in numerous historical centres of cities and villages located in areas having high seismicity, as evidenced during the 2016-2017 Central Italy seismic sequence that caused severe damages on buildings, hundreds of casualties and economic losses of the artistic and cultural heritage. In a...
Article
Full-text available
The probability of light damage to unprepared, unreinforced masonry structures exposed to induced seismicity due to gas extraction in the north of the Netherlands is still under investigation. Repeated light seismic excitations caused by frequent, light and nearby earthquakes have been linked to economical losses and societal unrest in particular,...
Conference Paper
Full-text available
Seismic isolation is a proven strategy for protecting critical infra-structures from the damaging effects of design-level earthquake shaking. For seismically isolated highway bridges, the expected seismic performance is to provide limited service under a safety evaluation-level ground shaking with minimal to moderate damage. The behavior under extr...
Conference Paper
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The design of seismic resistant structures according to the current design codes is based on satisfaction of the prescribed design criteria, related to the requirement for structural stiffness, resistance and ductility. Considering that steel moment resisting frames are displacement sensitive structures, damage limitation requirement or inter-store...
Article
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Catastrophe models are important tools to provide proper assessment and financial management of earthquake-related emergencies, which still create the largest protection gap across all perils. Earthquake catastrophe models include three main components, namely: (1) the earthquake hazard model, (2) the exposure model and, (3) the vulnerability model...
Conference Paper
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Local seismic response analysis represents a fundamental tool for assessing the seismic risk of urban areas and Cultural Heritage (CH) sites, nevertheless several open questions remain when complex geological contexts are considered. This study has been carried out in the framework of the research project STABLE (H2020 RISE-Marie Curie Action) whic...
Conference Paper
Full-text available
Probabilistic seismic hazard assessment (PSHA) is widely used in earthquake engineering practice and seismic risk management. The results of classical point-wise (PW) PSHA contain no information about simultaneous ground motions during one earthquake at different sites located within a defined area. Such multiple-site (MS) estimations are very usef...
Article
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This study presents a ground response assessment performed at Nador city (Morocco) and surrounding areas. We carried out the one-dimensional equivalent linear approach using the known geotechnical parameters to derive amplification analysis at studied sites, using the shear wave velocity (VS(30)) derived from boreholes. Seismic hazard assessment is...
Article
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The 2021 Mw 7.3 Maduo earthquake revealed the significant seismic hazard of faults developed within the Bayan Har Block of eastern Tibet, China (e.g., the Kunlun Pass–Jiangcuo Fault). Relocated aftershock data are in good agreement with the Interferometric Synthetic Aperture Radar (InSAR) coseismic displacement field and field investigations. In th...
Article
Full-text available
To cope with earthquakes, resistant housing is crucial. Too often essential construction techniques are not applied in the most vulnerable contexts. Local construction stakeholders have a major responsibility in reducing vulnerability of the built environment. This exploratory study investigates current seismic risk awareness in the region of Iring...
Article
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The seismic history of the Mosha fault, the largest and most active fault of Eastern Tehran metropolis, and its relation to the Damavand active volcano, the highest mountain in the Middle East, is investigated. We deduce that the central Mosha, near the Damavand, has a higher seismicity than either its western or eastern segments. On 7 May 2020, an...
Article
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Buried continuous pipelines are prone to failure due to permanent ground deformation as a result of fault rupture. Since the failure mode is dependent on a number of factors, a probabilistic approach is necessary to correctly compute the seismic risk. In this study, a novel method to estimate regional seismic risk to buried continuous pipelines is...