Experimental and theoretical study of Schumann resonance

The propagation of ELF-ULF electromagnetic waves in the Earth-ionosphere waveguide is the subject of a long-term study at the Sadovsky Institute of geospheres dynamics within the geophysical vertical framework. This study closes the chain of processes that start from the solar activity and occur in the upper geospheres with the problems of the lithosphere-ionosphere interaction. The 3D numerical model is described with results of verification on the analytical solutions and applications to a number of lower ionosphere models. In conclusion we set up the list of the forthcoming problems in SR physics which are most important for the physics and chemistry of environment under the global climate change.