Huancayo is the only equatorial electrojet station where the daytime increase of horizontal geomagnetic field (<i>H</i>) is associated with a simultaneous increase of eastward geomagnetic field (<i>Y</i>). It is shown that during the counter electrojet period when ∆<i>H </i>is negative, ∆<i>Y</i> also becomes negative. Thus, the diurnal variation of ∆<i>Y </i>at equatorial latitudes is suggested to be a constituent part of the equatorial electrojet current system. Solar flares are known to increase the <i>H</i> field at an equatorial station during normal electrojet conditions (nej). At Huancayo, situated north of the magnetic equator, the solar flare effect, during nej, consists of positive impulses in <i>H</i> and <i>Y</i> and negative impulse in <i>Z</i> field. During counter electrojet periods (cej), a solar flare produces a negative impulse in <i>H</i> and <i>Y</i> and a positive impulse in <i>Z</i> at Huancayo. It is concluded that both the zonal and meridional components of the equatorial electrojet in American longitudes, as in Indian longitudes, flows in the same, E region of the ionosphere.<br><br><b>Key words.</b> Geomagnetism and paleomagnetism (dynamo theories) · Ionosphere (equatorial ionosphere; ionosphere disturbances)