Geospace Storm Dynamics, Ring Current, Particle Acceleration, Magnetic Storm Dependence on Solar and Interplanetary Events, Coronal Mass Ejection, Forecast of Geomagnetic Storms, Ionospheric Storms at Middle Latitudes, Disturbance Mechanisms, Positive and Negative Ionospheric Storms, Magnetic Storm Effects, Seasonal and Local Time Variations of Ionospheric Storm Effects, Radio Waves Propagation Channel, Simulation of Dynamic Processes in Ionosphere, Modeling of Ionospheric Parameters