Auroral Occurrences and Field-Aligned Currents Observed over the Jang Bogo Station, Antarctica

Energetic particles precipitating from the magnetosphere along the magnetic field lines excite and ionize the neutral particles in the Earth’s atmosphere, and the excited particles release their energy in the form of light, which is known as the aurora. The dominant precipitating particles being responsible for the generation of the aurora are electrons, and the downward electrons constitute upward Field-Aligned Currents (FACs) between the ionosphere and the magnetosphere. In 2018, Aurora All-Sky Camera was installed at Jang Bogo station (JBS) in Antarctica for monitoring auroral activities in visible frequency range with color CCD and it has been continuously operated since then. At the location of JBS, the auroral occurrence shows significant MLT (Magnetic Local Time) variations with the highest occurrence rate in the MLT morning sector, which may imply that JBS is located in the boundary region between the polar cap and the auroral oval. In our previous study, we examined the temporal and spatial distributions of auroral occurrence. In this presentation, we compared the results of the distributions of auroral occurrence with satellite’s in-situ measurements of the Field-Aligned Current (FAC) in order to investigate the relationship between the auroral occurrence and the FACs.