Fig. 1From: Effects of the interplanetary magnetic field y component on the dayside auroraSchematic drawing of magnetic field line merging between the interplanetary (black) and Earth (green) magnetic fields predicted by the anti-parallel merging model as viewed from the Sun. For a positive IMF By component, the merging sites (red dashed ellipses) are located at the high-latitude dusk (dawn) sector of the Northern (Southern) Hemisphere. For a negative IMF By component, the merging sites change to high-latitude dawn (dusk) sector of the Northern (Southern) HemisphereBack to article page