Research interests comprise Sun-Earth connection physics in a wide sense: Energy transfer processes from the solar wind to the magnetosphere -- ionosphere system; Effects of large solar disturbances in the magnetosphere and ionosphere; Auroral processes and their relationship to magnetotail dynamics; Storm and substorm effects in the magnetotail, in the inner magnetosphere and in the ionosphere; Long-term solar variability effects in the geoefficiency of the solar wind driving; and Space weather effects of solar wind driven magnetospheric dynamics. Expert in empirical modeling of the magnetospheric magnetic field and development of quantitative analysis methods for global MHD simulations....