Ground-Satellite observation of geospace environment over Siberia and Japan

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We installed all-sky cooled-CCD imagers and induction magnetometers at Magadan and Paratunka in Far-East Russia in 2007-2008. By combining pre-existing imagers and the SuperDARN Hokkaido radar and newly-installed induction magnetometers in Japan, we developed a latitudinal chain of ground-based stations to observe the upper atmosphere and geospace. Using these ground-based observations as well as satellite observations, we investigate storm-time broadband electron precipitation, which can cause low-latitude red auroras, and ionospheric disturbances in the subauroral region to middle latitudes.