On nonlinear displacement of the latitude profile of Pc5 geomagnetic pulsations
Автор: Potapov А.S., Guglielmi А.V.
Журнал: Солнечно-земная физика @solnechno-zemnaya-fizika
Статья в выпуске: 13, 2009 года.
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A pronounced discrepancy exists between the theory, which definitely indicates that magnetospheric oscillations are anharmonic, and the experimental study of geomagnetic pulsations. This paper raises a question about experimental study of the nonlinearity of Pc5 pulsation amplitude latitude profile (the period range is 150-600 s). To search for non-linear distortions of the profile, we used Pc5 observation data from the meridian chain of stations IMAGE. A specific event was analysed to show the northward displacement of peak Pc5 amplitude along the meridian with decreasing oscillation amplitude. The measurement findings allowed us to determine coefficient of non-linear distortions in the latitude profile. The main conclusion is that the anharmonicity of geomagnetic pulsations can be studied by experiment.
Короткий адрес: https://sciup.org/142103359
IDR: 142103359