@Article{BolzanDenaTard:2018:CoCoGe,
author = "Bolzan, Maur{\'{\i}}cio J. A. and Denardin, Clezio Marcos and
Tardelli, Alexandre",
affiliation = "{Universidade Federal de Jata{\'{\i}} (UFJ)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade do Vale
do Para{\'{\i}}ba (UNIVAP)}",
title = "Comparison of H component geomagnetic field time series obtained
at different sites over South America",
journal = "Annales Geophysicae",
year = "2018",
volume = "36",
number = "3",
pages = "937--943",
month = "June",
keywords = "Geomagnetism and paleomagnetism, time variations, diurnal to
secular.",
abstract = "The geomagnetic field in the Brazilian sector is influenced by the
South American Magnetic Anomaly (SAMA) that causes a decrease in
the magnitude of the local geomagnetic field when compared to
other regions in the world. Thus, the magnetometer network and
data set of space weather over Brazil led by Embrace are important
tools for promoting the understanding of geomagnetic fields over
Brazil. In this sense, in this work we used the H component of
geomagnetic fields obtained at different sites in South America in
order to compare results from the phase coherence obtained from
wavelet transform (WT). Results from comparison between Cachoeira
Paulista (CXP) and Eusebio (EUS), and Cachoeira Paulista and Sao
Luis (SLZ), indicated that there exist some phenomena that occur
simultaneously in both locations, putting them in the same phase
coherence. However, there are other phenomena putting both
locations in a strong phase difference as observed between CXP and
Rio Grande, Argentina (RGA). This study was done for a specific
moderate geomagnetic storm that occurred in March 2003. The
results are explained in terms of nonlinear interaction between
physical phenomena acting in distinct geographic locations and at
different times and scales.",
doi = "10.5194/angeo-36-937-2018",
url = "http://dx.doi.org/10.5194/angeo-36-937-2018",
issn = "0992-7689",
language = "en",
targetfile = "bolzan_comparison.pdf",
urlaccessdate = "27 abr. 2024"
}