TY JOUR TI Time-spatial correspondence between Pi2 wave power and ultra-violet aurora bursts KW ULF waves KW Pi2 pulsations KW substorm KW auroral oval KW ionospheric electrojet JO Russian Journal of Earth Sciences AU Martines-Bedenko, V.A. AU Pilipenko, V.A. AU Engebretson, M.J. AU Moldwin, M.B. PY 2017 IS 17 PB Geophysical Center of the Russian Academy of Sciences