A study is presented of the low-altitude polar cusp regions using the precipitating electron data from DMSP F2 and F4 satellites during 54 quasi-simultaneous traversals of the polar cusp region in the same hemisphere. Electron precipitation features are used to determine the cusp morphology and behavior at different magnetic local times for varying orientations of the interplanetary magnetic field (IMF). Indication is found of a systematic shift of the equatorward boundary of the morning cusp region toward the pole (or the equator) in the southern hemisphere for positive (or negative) IMF By with respect to its position at noon as detected nearly simultaneously by the other satellite. ¿ American Geophysical Union 1989