Seismicity
Mostrando 1-12 de 26 artigos, teses e dissertações.
-
1. 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
-
2. Microfacies and diagenetic evolution of the limestones of the upper part of the Crato Formation, Araripe Basin, northeastern Brazil
Abstract This paper presents the results of a petrographic and diagenetic study of the laminated limestones of the upper part of the Aptian to Albian Crato Formation, northeast of Brazil. The applied techniques were optical microscopy, cathodoluminescence and scanning electron microscopy (SEM) coupled to a wavelength-dispersive spectrometer (WDS). Petrograph
Braz. J. Geol.. Publicado em: 08/04/2019
-
3. The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil
ABSTRACT The main goal of this paper is to characterize the Coxim earthquake occurred in June 15th, 2009 in the Pantanal Basin and to discuss the relationship between its faulting mechanism with the Transbrasiliano Lineament. The earthquake had maximum intensity MM V causing damage in farm houses and was felt in several cities located around, including Campo
An. Acad. Bras. Ciênc.. Publicado em: 25/08/2016
-
4. A numerical study on seismic response of self-centring precast segmental columns at different post-tensioning forces
Precast bridge columns have shown increasing demand over the past few years due to the advantages of such columns when compared against conventional bridge columns, particularly due to the fact that precast bridge columns can be constructed off site and erected in a short period of time. The present study analytically investigates the behaviour of self-centr
Lat. Am. j. solids struct.. Publicado em: 2014-10
-
5. 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
-
6. Estudo do potencial da técnica de nanossísmica para o monitoramento de hidrofraturamento em reservatórios de hidrocarbonetos
Hydraulic fracturing is an operation in which pressurised fluid is injected in the geological formation surrounding the producing well to create new permeable paths for hydrocarbons. The injection of such fluids in the reservoir induces seismic events. The measurement of this reservoir stimulation can be made by location these induced microseismic events. Ho
Publicado em: 2010
-
7. Main shocks and evolution of complex earthquake networks
Dynamical evolution of earthquake network is studied. Through the analysis of the real data taken from California and Japan, it is found that the values of the clustering coefficient exhibit a specific behavior around the moment of a main shock: the coefficient remains stationary before a main shock, suddenly jumps up at the main shock, and then slowly decre
Brazilian Journal of Physics. Publicado em: 2009-08
-
8. Estudo da atividade sísmica em São Caetano-PE em 2007
Nesta dissertação foi estudada a atividade sísmica no município de São Caetano, estado de Pernambuco, Nordeste brasileiro, localizado próximo ao Lineamento Pernambuco. O Lineamento Pernambuco é uma zona de cisalhamento Neoproterozóica de escala continental que deforma a província Borborema. A sismicidade estudada ocorreu numa ramificação para nord
Publicado em: 2009
-
9. Seismic tomography with P- and S-waves for the study of the upper mantle in Brazil / Tomografia sísmica com ondas P e S para o estudo do manto superior no Brasil
We used travel time seismic tomography to study the upper mantle beneath SE and Central Brazil. This method is based on the inversion of P- and S-wave relative travel time residuals (VanDecar, 1991) obtained from more than 80 stations in an area of 20 x 20 degrees. More than 11000 P and PKP residuals, and more than 8000 S, ScS, SKS, and SKKS residuals were o
Publicado em: 2008
-
10. InterpretaÃÃo sÃsmica e modelamento magnetomÃtrico e gravimÃtrico 2D e 3D de corpos vulcÃnicos localizadosna sub-bacia do Platà de Pernambuco: uma contribuiÃÃo Ãsua evoluÃÃo tectono-estratigrÃfica
A Sub-bacia do Platà de Pernambuco à uma das Ãltimas porÃÃes sedimentares percebidas e descritas na literatura, e certamente uma das Ãltimas a ser formada durante a separaÃÃo das placas Sul-Americana e Africana. Ela corresponde à sub-bacia offshore da Bacia de Pernambuco e à marcada por grande proporÃÃo de derrames vulcÃnicos ocasionados provave
Publicado em: 2008
-
11. 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
-
12. Tectônica rúptil e sismicidade na área de inundação do açude do Castamhão (CE): implicações para o risco sísmico
O presente estudo descreve os aspectos deformacionais frágeis e a sismicidade na região que será inundada pelo reservatório do Açude do Castanhão, porção leste do estado do Ceará. O lago artificial terá a capacidade para armazenar em torno de 6,7 bilhões de m3 de água. Também é planejada a instalação de uma usina hidroelétrica de pequeno por
Publicado em: 2001