Three unsolved problems in physics of Pc1 magnetospheric waves
Category: 16-3UDC 550.385.37
A.V. Guglielmi
Schmidt Institute of Physics of the Earth of the Russian Academy of Science, Moscow, Russia
Abstract. The open problems in the physics of Pc1 ultra-low-frequency electromagnetic waves, also known as “pearls” (0.2–5 Hz frequency range), are analyzed. A number of theoretical problems arose because the standard model of excitation and propagation of waves in the magnetosphere, which basis was set half a century ago, is unable to explain observable properties of Pc1. In the article these problems are formulated and discussed in the context of general physics of the geoelectromagnetic waves. In addition, one problem of experimental character is considered. The essence of the problem is that the observations testify in favor of the idea of some anthropogenic impact on the Pc1 oscillation mode, but difficulties in interpreting observations indicate a need for further experimental research.
Keywords: magnetosphere, radiation belt, self-excitation regime, ultra-low-frequency waves, ion-cyclotron resonator.
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