Q-Bursts Generated by the Contact of the Interplanetary Shock Wave with the Magnetosphere

Abstract

The study presents the results of the global registration of a short-term train of damped oscillations in the frequency range 0,5–30,0 Hz (Q-burst), observed at the initial phase of the preliminary impulse of the sudden onset SC on 09.09.2011. The spatial features of the spectrum of train oscillations are studied. We discovered A spectral-resonance structure of bursts, which is observed globally. It is assumed that bursts are generated as a result of powerful lightning discharges that create red sprites in the ionosphere. The electromagnetic radiation of sprites is captured in the earth-ionosphere waveguide and propagates globally. We assumed that one of the reasons for the increase in the power of the Q-signal is the coincidence of the beginning of its generation with the amplification of the ionospheric current system of the preliminary impulse of the sudden onset of SC.