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Long period geomagnetic field fluctuations at Terra Nova Bay (Antarctica)
Author(s) -
Villante U.,
Lepidi S.,
Francia P.,
Meloni A.,
Palangio P.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl01466
Subject(s) - earth's magnetic field , bay , nova (rocket) , daytime , latitude , spectral analysis , climatology , solar wind , period (music) , geology , atmospheric sciences , oceanography , environmental science , physics , geodesy , magnetic field , astronomy , spectroscopy , aeronautics , quantum mechanics , acoustics , engineering
A statistical analysis of the power spectra (0.7–5 mHz) of the geomagnetic field components H and D recorded at Terra Nova Bay (Antarctica) during three austral summers close to the maximum of solar activity reveals power enhancements in the H component at ≈ 3.3, 3.9 and 4.5 mHz, which become more evident during daytime intervals. During intervals characterized by higher solar wind speeds these spectral features more clearly emerge and are also accompanied by other enhancements at lower frequencies (≈ 1.2, 1.9 and 2.7 mHz). The observed frequencies are close to the ones detected both at auroral and low latitudes.