f Nonlinear Dynamics and Geomagnetic Disturbances

The methods of nonlinear dynamics are applied to the study of geomagnetic disturbances. The correlation dimension of the strange attractor of the underlying dynamical system is considered as a characteristic of chaotic behavior of variations of geomagnetic field (UGF) and time evolution of the correlation dimension is studied on the basis of UGF measured by observatories of auroral zone.