Seismic Activity
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. The use of seismic tomography to describe the upper crustal structure beneath the Chalupas Caldera, Ecuador
Abstract The Chalupas Caldera is a rhyolitic volcano located in the Eastern Cordillera to the Southeast of the Cotopaxi Volcano in the Ecuadorian Andes. It is supposedly fed by a huge magmatic chamber below the caldera. For studying the Chalupas magmatic chamber, the tomographic models obtained by a Tarantola-Valette inversion and studied previously in the e
REM, Int. Eng. J.. Publicado em: 2021-06
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2. Constraints from magnetotellurics on the geological structure across a seismic area associated with water wells in the Paraná basin, Brazil
ABSTRACT: The occurrence of earthquakes associated with the opening of groundwater wells is a very rare phenomenon. We present the results from a magnetotelluric profile of about 4 km-long that crosses a seismic zone near the town of Bebedouro, in the Northeastern part of the intra-cratonic Paraná basin, in Brazil. The seismic activity is thought to be caus
Braz. J. Geol.. Publicado em: 13/01/2020
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3. Nonlinear static analysis of a pile-supported wharf
Resumo O objetivo deste artigo é desenvolver uma análise estática não-linear através de um estudo de caso de um cais sobre estacas situado em uma nova área portuária para petroleiras. A atividade sísmica da área é muito intensa com uma aceleração máxima do solo de 0.55 g. Por esta razão, é muito importante analisar o comportamento estrutural n
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
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4. Comparing blast-induced ground vibration models using ANN and empirical geomechanical relationships
Abstract Blasting remains as an economical and reliable excavation technique, but there are some environmental shortcomings such as the control of blast-induced vibration. The impacts of vibration over surrounding communities in a blast area have been investigated for decades and researchers have been using a myriad of empirical predictive attenuation equati
REM, Int. Eng. J.. Publicado em: 2018-03
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5. Propagação guiada de ondas de VLF: aplicação ao estudo de fenômenos atmosféricos e naturais
Deep amplitude minima are observed in the daily records of Very Low Frequency (VLF, between 3 - 30 kHz) wave amplitudes. Amplitude minima are attributed to modal interference and modal conversion of waves propagating in the Earth - Ionosphere waveguide. The time of amplitude minima is related with the localization of the Terminator line and, therefore, is de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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6. Estudoda sismicidade na região de Sobral - CE em 2008
The town of Sobral is located at the northwest part of the Ceará State, 250 km away from its capital, Fortaleza. In January 2008, an intense seismic activity began near Sobral with one event with magnitude 4,2mb on May 21. Since the start of its seismic activity, all events were recorded by the SBBR station (located on EMBRAPA Caprinos Farm), which operates
Publicado em: 2010
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7. Tectônica e sedimentação na Bacia do Camaquã Central (RS): exemplos do Grupo Guaritas e do Grupo Santa Bárbara / Tectonics and sedimentation in Central Camaquã Basin: the Guaritas Group and the Santa Bárbara Group
The relationship between tectonics and sedimentation plays a primordial role in the understanding of sedimentary successions. On the other hand, the study of pre-Silurian fluvial deposits represents a challenge due to the lack of interaction between land plants and river systems which characterizes post-Silurian environments. The Camaquã Basin (Ediacaran to
Publicado em: 2010
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8. Mamíferos marinhos, a atividade de prospecção sísmica e o uso do Sistema de Monitoramento de Mamíferos Marinhos - SIMMAM
Since 1999, a large amount of data on marine mammals sightings has been collected by observers on board during the conduct of seismic surveys in the Brazilian coast. This is one of the mitigating measures adopted to minimize the potential impact that the activity carries on marine species. The information gathered up the necessary documents for the process o
Publicado em: 2009
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9. Caracterização tectono-estratigráfica da sequência transicional na sub-bacia de Sergipe
This thesis deals with the tectonic-stratigraphic evolution of the Transitional Sequence in the Sergipe Sub-basin (the southern segment of the Sergipe-Alagoas Basin, Northeast Brazil), deposited in the time interval of the upper Alagoas/Aptian stage. Sequence boundaries and higher order internal sequences were identified, as well as the structures that affec
Publicado em: 2008
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10. Should standard building structures in Brazil be guaranteed by a seismic resistant design?
Brazilian territory is situated on an intraplate region with low seismic activity, and so, it is important to answer an old question that remains unanswered: "Should standard building structures in Brazil be guaranteed by a seismic resistant design?" In this way , a methodology is described and used to evaluate the annual failure probability of a structure m
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-06
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11. Seismic activity in Senador Sá-CE, Brazil, 1997-1998
O Açude Tucunduba está localizado no município de Senador Sá, a aproximadamente 290 km a oeste de Fortaleza - CE. O monitoramento sísmico da região foi realizado com uma rede sismográfica local e teve início em 11 de junho de 1997, logo após a ocorrência de um evento com magnitude 3,2 m b, no dia 09 de junho de 1997. A rede era composta de uma esta
Revista Brasileira de Geofísica. Publicado em: 2004-08
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12. Fractal rain distributions and chaotic advection
Localized rain events have been found to follow power-law distributions over several decades, suggesting parallels between precipitation and seismic activity [O. Peters et al., PRL 88, 018701 (2002)]. Similar power laws can be generated by treating raindrops as passive tracers advected by the velocity field of a two-dimensional system of point vortices [R. D
Brazilian Journal of Physics. Publicado em: 2004-06