Contribution of global рс5 oscillations to the magnetic disturbance during geomagnetic storms

A contribution of global magnetospheric oscillations to the magnetic disturbance during magnetospheric storms is investigated. To do this, we use the bases of magnetic data from the global network INTERMAGNET together with data from interplanetary and intramagnetospheric measurements of the magnetic field and plasma and also with sets of Kр, Dst and AE indices. Solar wind and magnetosphere conditions favorable for generating global Pc5 has been revealed. The contribution of these oscillations to variations of the magnetic storminess level determined by AE index was estimated. The results confirm that magneto-spheric MHD oscillations take part in processes of the solar wind energy input and dissipation in the magnetosphere.