Temporal and spatial variation of equatorial ionization anomaly by using multistation ionosonde data for the 19th solar cycle over the Indian region

► We examine temporal and spatial variation of equatorial ionization anomaly. ► Effect of solar cycle and seasons on EIA is local time dependent. ► EIA crest exhibits the feature of latitudinal shifting with increasing solar activity. ► Parameterization of the location and foF2 of the EIA crest has been performed. ► Gaussian fitting over the latitudinal distribution of foF2 has been performed.