The transient oscillatory variation of geomagnetic field after a sudden impulse which occurred at 17^h48^m UT on February 9, 1986 is examined. The oscillatory variation is predominant at the morning high latitudes but is also detected in low latitudes with nearly the same periods of about 180 seconds. A geostationary satellite, GOES 6, located near local noon recorded recurrent magnetopause crossings which correspond well to pulses in the oscillatory variation at Kakioka. It is also shown that the oscillatory variations at high latitudes are correlated with the time derivative of the horizontal component (DH) at Kakioka. Considering the meaning of Kakioka's DH, it is discussed that the oscillatory variations in the early morning auroral region may be caused by both field line oscillation and successive appearances and decays of global scale equivalent current systems due to recurrent magnetospheric compressions, while those at other local times at high latitudes are probably due to the latter.