A Result on Pc 3-4 waves in the Indian equatorial region

Abstract

A few characteristics of Pc 3-4 geomagnetic pulsation recorded at a station close to the equatorial electrojet in the Indian region under varied ionospheric conditions are reported. The polarization characteristics of these pulsations during counter electrojet condition are found to change in their ellipticities and orientation axes. These are attributed to either height distortions of ionospheric electric fields during the counter electrojet time or to changes of gyrotropic MHD waves that might be endogenously generated by the turbulence of equatorial electrojet.