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Aug 24, 2020Open    AccessArticle

Time Variations Analysis of the Geomagnetic Field in the Municipality of Macaé, Brazil

Laisa Prata Moreira Fernandes, Joao Victor Jobim de Souza e Silva, Iago Reis Homsi, Paula de Carvalho Garcia, Gabriel Teixeira de Oliveira Barroso, Tainá Rebelo e Ribeiro, Gabriel Gomes Dias de Oliveira, Vania Regina de Oliveira Branco, Hans Schmidt Santos
This paper presents the analysis of temporal variations of the geomagnetic field in the municipality of Macaé, Brazil. Current and historical magnetic field from the IGRF (International Geomagnetic Reference Field) and Gufm1 models were used to construct two-dimensional maps from 1590 to 2019. Analysis of the maps revealed that there was a large decrease in total magnetic field magnitude from around 48,000 nT in 1590 to 23,000 nT in 2019, i.e., a decrease of more than 50%. This decrease was inte...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106646


Oct 10, 2019Open    AccessArticle

AVO Didactic Analysis from Simplified Modeling of Seismic Data in Libra Oil Field of the Pre-Salt Region, Brazil

Kaio da Silva Pimentel Figueiredo, Kaendra Williams Temoteo, Rafael Ximenes Goncalves, Yasmim Monteiro Cordeiro, Rogério Manhaes Soares, Hans Schmidt Santos, Claudiomar Rodrigues Franco, Felipe Barbosa Venancio de Freitas, Christyne Barros de Sá
In this study, a certain zone of Libra oil field of the pre-salt region was se-lected to be analyzed for didactic purposes in order to simulate AVO re-sponses. The region was modeled using seismic data, setting up a typical oil system with source rock (shale), reservoir rock (sandstone), and seal rock (salt). Thus, a set of parameters such as seismic wave velocity, density and Poisson’s ratio for the studied zone w
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Open Access Library J. Vol.6, 2019
Doi:10.4236/oalib.1105788


Jul 30, 2019Open    AccessArticle

Geomagnetic Mapping of the Macaé Region, Brazil

Igor Rodrigues Salvador de Menezes, Júllia Medeiros Figueiredo, Davi Antonio Ferreira Velloso, Maria Eduarda da Silva Bento, Iuri de Azevedo Lima, Hans Schmidt Santos
This work presents the geomagnetic characterization of the municipality of Macaé, Brazil. Data from IGRF12 (twelfth edition of International Geomag-netic Reference Field) were used. Through the data collected in a regular grid of 0.1 degrees of the components, north, east and vertical were generated maps of components, inclination, declination, horizontal component and geomagnetic total field. The results showed important relative
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Open Access Library J. Vol.6, 2019
Doi:10.4236/oalib.1105593


Apr 29, 2019Open    AccessArticle

Magnetometric Characterization of the Rio do Peixe Basin, Brazil

Kaio da Silva Pimentel Figueiredo, Gabriel Machado Stutz Xavier, Dayane de Souza Pereira, Jennifer Santos Rosa, Tainá de Mello Ribeiro, Hans Schmidt Santos, Felipe Barbosa Venancio de Freitas, Rogério Manhaes Soares, Rayssa Barcellos Paiva
This work presents the analysis of magnetometric data of an aerial survey conducted in the Rio do Peixe Sedimentary Basin, which is a promising oil producing region in the state of Paraíba, Brazil. The collected aeromagne-tometric data allowed the preparation of maps regarding magnetic anomaly, horizontal and vertical derivatives, analytical signal and Euler Decon-volution that were compared w
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Open Access Library J. Vol.6, 2019
Doi:10.4236/oalib.1105362


Aug 23, 2018Open    AccessArticle

Optical Characterization of Atmospheric Aerosols via Airborne Spectral Imaging and Self-Organizing Map for Climate Change Diagnostics

John W. Makokha, Jared O. Odhiambo
Self-Organizing Map (SOM) analysis is used to perform optical characteri- zation of both Aerosol Optical Depth (AOD) and Angstrom Exponent (AE) retrieved from Moderate-resolution Imaging Spectroradiometer (MODIS) in relation to Precipitation Rate (PR) from Tropical Rainfall Measurement Mission (TRMM) over selected East African sites from 2000 to 2014 and further diagnose climate change over the region if any. SOM reveals a marked
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Open Access Library J. Vol.5, 2018
Doi:10.4236/oalib.1104698


May 21, 2018Open    AccessArticle

The Effect of Spike and Gap Deconvolution on 2D Land Seismic Data

Hassan Z. Ali, Hassan A. Thabit
In this paper we are performing Spiking and Gap deconvolution on land 2D data; we are applying on the shot and stack data with operator length (200 ms), while in the gap deconvolution it is used different gap window (16.24 ms). The quality of output data is better than input data, and there is homogeneity in the distribution of frequencies. Also the band width of frequencies is increasing and smoothing spec
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Open Access Library J. Vol.5, 2018
Doi:10.4236/oalib.1104594


Dec 19, 2017Open    AccessArticle

Strength Limit of Earth: A New Fundamental Phenomenal Factor for Universe’s Precise Scientific Perceptions and Descriptions

Mohammad Salehi Alashti
Intuition of many different unsolved problems and questions remains the “sorest troubles” in basis and applied sciences particular in physics today. Also presented physical models doesn’t describe world’s framework aright and these make lots of defects to understand sciences and solve scientific problems. Therewith no one can formulate the complicate relation(s) between all existences’ and sciences’ components. However,
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Open Access Library J. Vol.4, 2017
Doi:10.4236/oalib.1104034


Nov 30, 2017Open    AccessArticle

Seismic Source Modeling in the Shores of Western Makran

Mahdi Modiri, Amir Barzegari, Amir Sahebalzamani, AbdolReza Hashemi
Makran is an active subduction zone with a lower activity rate in comparison with other similar subduction zones. In the extent of Makran seismotectonic province, from coastline up to 70 Km distance onshore, the earthquakes are shallow whilst further inland, focal depths of the earthquakes are deeper. Con-sidering the low seismic activity rate, lack of adequate and reliable seismic data and uncertainty about earthquake hazard cont
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Open Access Library J. Vol.4, 2017
Doi:10.4236/oalib.1104094


Nov 22, 2017Open    AccessArticle

Urban Electromagnetic Spider Web

Min Jiang
Here design of electromagnetic spider webs imitating the actual spider web and trigram cropland structure, using the principle of bionics will combine Telluric Current, electricity, Atmospheric electronic, E-compass, 4G-GSM wave Switch, low and high frequency wireless transmitting and receiving devices. WIFI devices Switch. In theory, the electromagnetic spider webs induction method in Maxwell equation is adopt
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Open Access Library J. Vol.4, 2017
Doi:10.4236/oalib.1104007


Sep 14, 2017Open    AccessArticle

Statistical Analysis of Natural Water Conductivity Data Behavior in Two Wells: Seismic Coastal Border Limits of Guerrero-Oaxaca States, Mexico

Fidel Martínez-García
In this document, with the purpose of strengthening more in the knowledge of the previous events on the earthquakes, the possible connection between natural voltage and electromagnetic energy emanating from the inner layers of the Earth and the seismic activity in the Mexican seismic coastal border, is evaluated, through an indirect estimation of the statistical analysis of natural water conductivity data (μS/cm) and the seismic a
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Open Access Library J. Vol.4, 2017
Doi:10.4236/oalib.1103900


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