Abstract
We have attempted to estimate geomagnetic conjugate points using Pc5 geomagnetic pulsation data. The Pc5 pulsation data were obtained simultaneously at three coordinated stations in Iceland and at three stations in Antarctica, including Syowa Station, for the months of March and May in 1988. In this analysis, it was principally assumed that Pc5 pulsations have a form of odd mode standing oscillations of the geomagnetic field line with linear phase shifts among the stations in the horizontal plane. Conjugate points were calculated uniquely. The statistical result showed that conjugate points of Syowa Station estimated from the Pc5 events were concentrated around the conjugate points in Iceland calculated from the magnetic field model of Tsyganenko (1987) within the range of 66°-68° in latitude, and 70°-76° in longitude, i.e., less than 1/5 wave length.
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