Daily Variations of the Geomagnetic Field in the Brazilian zone

The solar quiet daily variation (Sq) was investigated with respect to the longitudinal and seasonal variations at the Brazilian geomagnetic ground stations of Tatuoca (TTB), Vassouras (VSS ) and São Martinho da Serra (SMS). The data utilized was collected during the time interval from January to May...

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Bibliographic Details
Published inarXiv.org
Main Authors Oliva, David, Espírito Santo, Marco A, Papa, Andrés R R
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 16.04.2014
Subjects
Annual variations
Continuous wavelet transform
Correlation analysis
Geomagnetic field
Geomagnetism
Ground stations
Observatories
Planetary waves
Wavelet transforms
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Summary:The solar quiet daily variation (Sq) was investigated with respect to the longitudinal and seasonal variations at the Brazilian geomagnetic ground stations of Tatuoca (TTB), Vassouras (VSS ) and São Martinho da Serra (SMS). The data utilized was collected during the time interval from January to May 2010. We employed the continuous wavelet transforms and cross wavelet coherence to study the spectral content and correlations of the time series in the time-frequency domain. We identified possible phenomena of regional or global scope that could be affecting the magnetic response measured at TTB, VSS and SMS observatories. As a result some signatures of planetary waves and semidiurnal tides in the Sq variability were obtained.
ISSN:2331-8422