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An analysis of the site effect at accelerograph units from Santiago de Cuba is carried out for the first time in Cuba; using accelerograph records of strong movements corresponding to the Haiti earthquake on August 14, 2021 of magnitude 7.2. The method of direct interpretation of the Fourier transform is used. The main results show that the APTO station, located on the soft soil of marine deposits, beach sand and pebbles, and storm banks, shows the highest amplitude values (APTO 69.625), as well as the highest period values (0.430 s), compared to the ABON station (0.195 s). The maximum frequency value (5,139 Hz) corresponds to the ABON station. [ABSTRACT FROM AUTHOR]

During the last decade, in several localities of the Cuban provinces of Matanzas, Villa Clara, Cienfuegos and Sancti Spíritus, seismic movements have been perceived, causing great concern on their population and institutional managers. The purpose of this research was to evaluate the possible causes of the seismicity originating in the aforementioned provinces based on the analysis of the Cuban seismic catalogues and the available geological and geophysical articles and reports. It was possible to reveal that release of seismic energy accumulated in the rocks is the cause of reactivating regional and minor order faults, what justifies the seismicity in this zone. The different performance of seismic activity recorded in these territories is due to the unequal response to tensions accumulated mainly by the geologicaltectonic complexity and its relationship or not with gravitational and isostatic blocks. [ABSTRACT FROM AUTHOR]

Earthquakes are adverse natural events that generate human losses and material damage. The aim of the study was to analyze seismicity and risk perception in the Department of Ica, Peru. The city of Pisco was selected because of the seismic event that occurred on August 15, 2007. By means of random probability sampling, 10 houses at a distance of 1 km from each other and close to the coastline were selected for the vulnerability analysis. A survey was administered to one member of the household, corresponding to four of the 10 dwellings and the resident population’s manifestation of seismic risk and housing vulnerability was analyzed. The Likert scale indicated that the knowledge of the population according to the questionnaire was not very relevant and the results were reliable, since the interpretative consistency of Cronbach’s alpha coefficient was 0.7.When applying the SWOT matrix for the vulnerability analysis, it was observed that the criteria of order, mobility and dependence were in the conflict quadrant, which could be interpreted as the presence of unfamiliar conditions and technical condition of the buildings in unfavorable conditions. It is concluded that the population does not have perception of risk in the face of adverse natural events such as earthquakes. They have not received training or orientation on the vulnerability of their homes to act in the event of a probable occurrence. The technical construction conditions of the houses do not meet earthquake resistance requirements. [ABSTRACT FROM AUTHOR]

The structural conception of Soviet Large Concrete Panel Housing System gives it a high degree of hyperstaticity. However, there are uncertainties about the seismic behavior of buildings built in Santiago de Cuba province, Cuba due to the presence of pathological damages in joints, elements, and also due to the modifications in weight and rigidity made by inhabitants. Given the incidence of soil factors that increase the problem, the seismic behavior of these buildings is evaluated in relation to the type of soil, resonance and landslide sensibility, with probability of overturning. Firstly, a documentary analysis of location area is used and a structural modeling of two variants of building is carried out in a second stage, by using the ETABSv18 software. It is concluded that, in both variants, landslide is not possible, but it is evident that overturning is really possible to occur. Similarly, resonance and soil liquefaction are unlikely. [ABSTRACT FROM AUTHOR]

The southeastern part of Cuba is considered to be the area of greatest seismic hazard in the country, due to its proximity to the Bartlett-Cayman fault zone, therefore a moderate to high intensity seismic activity can induce geological hazards in this region and impact the environment. The main objective is to propose a methodology that allows to evaluate the susceptibility to landslides and the liquefaction of soils induced by earthquakes for southeast Cuba through the geological characterization, identification of anthropized factors; morphotectonic characterization and seismological evaluation. New maps of landslide susceptibility and liquefaction induced by earthquakes are obtained as results; as well as the direct verification in the terrain of landslides; the main faults that cut the study area are identified; and the morphotectonic blocks and the relative movement between them are established and characterized. [ABSTRACT FROM AUTHOR]

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The analysis of the parameters of an earthquake is of vital importance for the determination of the seismic threat and the estimation of its effects on the surface. With the purpose of mitigating the risk in the event of an earthquake, seismic intensity is used, so this work had as objective to apply and evaluate in the south eastern region of Cuba, the one with the highest seismic activity, the Intensity_Map software. This tool allows to generate automatically, and in almost real time, an estimated map of intensities considering a circular attenuation. A comparison of the effectiveness between this software and the Macro (traditionally used in Cuba) was made. The maps of the Intensity_Map present a scale of colors in correspondence with the softwares used internationally, thus enhancing the quality of the information they provide. Similarity was obtained in the effectiveness of the theoretical estimates made by both software, mainly for values close to the epicenter, which evidenced the possibility of using circular isosists and the application of Intensity_Map software in the Cuban National Seismological Service for the epicentral relocation and macroseismic re-evaluation of earthquakes recorded instrumentally or not. [ABSTRACT FROM AUTHOR]

Decree 44/2011, of April 29, of the Consell, approves the Special Plan for Seismic Risk in the Valencian Community. This plan seeks to guarantee the safety of the inhabitants in the event of seismic movements and is based on state, community, and regional regulations related to civil protection and construction. The plan establishes the obligation to have Municipal Action Plans in 332 municipalities of the Valencian Community that are susceptible to earthquakes of intensity equal to or greater than grade VII. In addition, planning is recommended in another 75 municipalities. The plan distinguishes different phases and emergency situations in the event of an earthquake, and its entry into force is the day of its publication in the Official Gazette of the Valencian Community. [Extracted from the article]

Copyright of Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales is the property of Academia Colombiana de Ciencias Exactas, Fisicas y Naturales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The work includes briefly the seismological history of over 500 years on the North Caribbean. In this segment have been determined approximately 100 strong earthquakes and 28 tsunamis with important economic damages. The estimated maximum magnitude was 8.2. The main features and differences of the insular countries are exposed. They are seismic actives, but with very limited economic resources. [ABSTRACT FROM AUTHOR]

Copyright of Boletin de Geologia is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article analyzes the historical data of two earthquakes that caused a strong impact in Bogotá, occurred on July 12, 1785 and August 31, 1917. Besides the implications for seismic hazard in Bogota, these events are interesting because preliminary researches have located their epicenters in areas where there is no evidence of recent tectonic activity. The new historical documentary records found in this study contain data related to damage and effects in different towns, and were organized and analyzed to obtain intensity registers. The resulting intensity distribution, superimposed with the seismogenic sources, suggest new epicentral areas for these earthquakes. [ABSTRACT FROM AUTHOR]

The NOA presents, historically, manifestations of seismic movements that, in several opportunities, have hit of catastrophic way in different populations from the same. This work aims to collect and to analyze the data available on the historical and instrumental seismicity of the region in order to explain its strong seismic danger. The historical-geographic investigation allowed the preparation of a chronological picture of the earthquakes registered in the NOA and of a cartography of regional seismic intensity of value VI and greater in the EMM. They made possible to determine the proportions the high degree of seismic danger that also affects to the region and the potential occurrence of future socio-naturals disasters by earthquakes based on the different situations from physical, structural and socioeconomic vulnerability that presents the population of the NOA and its installations. [ABSTRACT FROM AUTHOR]

Copyright of Revista Internacional de Desastres Naturales, Accidentes e Infraestructura Civil is the property of University of Puerto Rico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)