This book is devoted to the theory of geoelectromagnetic oscillations and waves, i.e. waves of natural origin arising in the Earth’s crust, in the ocean, in the atmosphere, in the ionosphere, in the magnetosphere and in the interplanetary medium in front of the magnetosphere.
We have sought to give a simple and clear presentation of the physical picture of the waves. When selecting the material special attention was paid to the theoretical inferences that can be easily compared with the observational data. Complicated and unwieldy calculations were omitted where possible. At the same time, where formulae have been presented without derivation, we have tried to explain their physical meaning.