Multifractal characteristics of geomagnetic field fluctuations for the northern and southern hemispheres at swarm altitude
Author
dc.contributor.author
Toledo Cabrera, Benjamín Andrés
Author
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Medina, Pablo
Author
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Blunier, Sylvain
Author
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Rogan Castillo, José Antonio
Author
dc.contributor.author
Stepanova, Marina
Author
dc.contributor.author
Valdivia Hepp, Juan Alejandro
Admission date
dc.date.accessioned
2021-11-15T19:18:37Z
Available date
dc.date.available
2021-11-15T19:18:37Z
Publication date
dc.date.issued
2021
Cita de ítem
dc.identifier.citation
Entropy 2021, 23, 558
es_ES
Identifier
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10.3390/e23050558
Identifier
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https://repositorio.uchile.cl/handle/2250/182691
Abstract
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This paper explores the spatial variations of the statistical scaling features of low to high latitude geomagnetic field fluctuations at Swarm altitude. The data for this study comes from the vector field magnetometer onboard Swarm A satellite, measured at low resolution (1 Hz) for one year (from 9 March 2016, to 9 March 2017). We estimated the structure-function scaling exponents using the p-leaders discrete wavelet multifractal technique, from which we obtained the singularity spectrum related to the magnetic fluctuations in the North-East-Center (NEC) coordinate system. From this estimation, we retain just the maximal fractal subset, associated with the Hurst exponent H. Here we present thresholding for two levels of the Auroral Electrojet index and almost the whole northern and southern hemispheres, the Hurst exponent, the structure-function scaling exponent of order 2, and the multifractal p-exponent width for the geomagnetic fluctuations. The latter quantifies the relevance of the multifractal property. Sometimes, we found negative values of H, suggesting a behavior similar to wave breaking or shocklet-like propagating front. Furthermore, we found some asymmetries in the magnetic field turbulence between the northern and southern hemispheres. These estimations suggest that different turbulent regimes of the geomagnetic field fluctuations exist along the Swarm path.
es_ES
Patrocinador
dc.description.sponsorship
National Agency for Research and Development (ANID) under Fondecyt 1190703
1190662
3180315
CEDENNA through "Financiamiento Basal para Centros Cientificos y Tecnologicos de Excelencia" FB0807
United States Department of Defense
Air Force Office of Scientific Research (AFOSR) FA9550-20-1-0189
es_ES
Lenguage
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en
es_ES
Publisher
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MDPI
es_ES
Type of license
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Attribution-NonCommercial-NoDerivs 3.0 United States