A nonlinear displacement of Pc5 latitudinal profiles |
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| Authors: | A S Potapov A V Guglielmi |
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| Institution: | 1.Institute of Solar-Terrestrial Physics, Siberian Branch,Russian Academy of Sciences,Irkutsk,Russia;2.Institute of Physics of the Earth,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | A pronounced difference exists between the theory, which definitely indicates that magnetospheric oscillations are anharmonic,
and the experimental study of geomagnetic pulsations. The experimental study of the nonlinearity of the Pc5 pulsation amplitude
latitudinal profile (the range of periods is 150–600 s) is considered. The Pc5 registrations at the IMAGE meridional chain
of station were used to search for nonlinear distortions of the profile. Using a specific event, it has been indicated that
the Pc5 amplitude peak shifts northward along the meridian with decreasing oscillation amplitude. The coefficient of nonlinear
distortions in the latitudinal profile has been determined based on the measurements. The main conclusion consists in that
a delicate problem of geomagnetic pulsation anharmonicity can be entirely studied experimentally. |
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