Abstract
The data of the geophysical observation complex at Barentsburg observatory on Spitsbergen archipelago, together with the data from other stations and satellite observations, were used to interpret a sharp increase in the frequency interval in the electromagnetic noise spectral resonance structure (SRS) in the 0.1–10 Hz range that took place during a substorm that occurred on December 24, 2005. It has been shown that such a change in SRS is related to a decrease in the electron density in the ionospheric F region, which agrees with the ionospheric Alfvén resonator theory. In turn, a decrease in electron density is probably related to the fact that the station was in the auroral cavity region related to the field-aligned current flowing into the ionosphere.
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Original Russian Text © N.V. Semenova, A.G. Yahnin, 2014, published in Geomagnetizm i Aeronomiya, 2014, Vol. 54, No. 3, pp. 341–347.
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Semenova, N.V., Yahnin, A.G. Sudden change in the resonance structure in the electromagnetic noise spectrum in the 0.1–10 Hz range during a substorm. Geomagn. Aeron. 54, 316–322 (2014). https://doi.org/10.1134/S0016793214030153
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DOI: https://doi.org/10.1134/S0016793214030153