Abstract

A comprehensive study of geomagnetic field variations has been carried out at the dip equatorial latitudes of West Africa. The data obtained during the 1993 French participation in the International Equatorial Electrojet Year experiment in Africa was used for the analysis. Only the quiet condition was examined. Variation in the three geomagnetic field elements (H, D, and Z) showed more variability in D element than in the other two elements. Night time variations was observed in all the three elements which suggests the existence of night time current in the dip equatorial latitudes of West Africa.

Key words: West Africa, Fourier analysis, solar quiet, dip equator, variation