Critical problems of equatorial electrojet

Abstract

This paper describes the general features of the equatorial electrojet current over the magnetic equator based on ground geomagnetic observatory data, rocket borne magnetometer data, ground based HF and VHF sounding of the atmosphere. Also are described its association with magnetosphere currents, interplanetary magnetic field charges and with Equatorial Ionisation anomaly and plasma irregularities in the F region. Distinct unsolved problems of equatorial electrojet are pointed and suggestions of coordinated investigations are made to understand the highly complex nature of equatorial electrojet.