The nature of the diurnal variation of the ionospheric component of the equatorial electrojet and planetary Sq field is studied using the horizontal intensity data of a suitable triad of stations in the Indian zone separately for conditions of enhanced geomagnetic activity in the northern and southern hemispheres. It is shown that the influence of the North-South asymmetry is manifested in distinct fashions in the diurnal patterns of Sq and jet. Disturbance dynamo caused by even moderate geomagnetic activity appears to alter the shape and structure of the equatorial electrojet and the planetary Sq current systems. Conspicuous absence of the difference when the asymmetry in geomagnetic activity vanishes confirms the perceptible influence of the N-S asymmetry on the ionospheric current system at low and equatorial latitudes.
