
doi: 10.1038/193567a0
PRELIMINARY investigations on magnetic variation in Ghana were reported at the Helsinki Congress of the International Union of Geodesy and Geophysics in 1960. It was suggested that the variability from day to day in the diurnal range of the vertical field component at a station 0.5° south of the magnetic equator indicated a movement of the equatorial electrojet north or south on different days.
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