The structure of extremely low frequency field reflected by the ionosphere |
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| Authors: | E D Tereshchenko A E Sidorenko V F Grigor’ev A A Zhamaletdinov |
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| Institution: | 1.Polar Geophysical Institute,Russian Academy of Sciences,Murmansk,Russia;2.Geological Institute, Kola Science Center,Russian Academy of Sciences,Apatity, Murmansk oblast,Russia |
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| Abstract: | The amplitudes of variations in the magnetic and electric fields at extremely low frequencies were studied on the Kola Peninsula
during a five-day-long experiment under different geophysical conditions. These studies demonstrated that the influence of
the ionosphere is distinguishable at frequencies of <10 Hz and the structure of field variations reflected by the ionosphere
is similar to that of the transverse wave. It is established that the ratio between semimajor axes of polarization ellipses
of the electric and magnetic fields is independent of the state of the ionosphere and is likely determined by the deep structure
of the crust beneath the site of the experiment. |
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