A Comparison Study of the Occurrence of Equatorial Type Es and Daytime Blanketing Es in the Magnetic Equatorial Zone

A study of the occurrence frequency of equatorial E s (E sq ) and daytime blanketing E s at Ibadan (dip 6°S) and Zaria (dip 3°N) in Nigeria is presented. The period of study covers the years 1958 to 1965. Experimental results from the study reveal that E sq and blanketing E s are different phenomena and that a high incidence of E sq is usually accompanied by a low incidence of blanketing E s , and vice versa. In addition, the extent of the E sq belt in Nigeria is deduced from the relative occurrence of E sq and nonequatorial E s during the daytime at Ibadan.