Identification of the current system associated with a partially reversed equatorial electrojet

Abstract

An abnormality among a series of geomagnetic quiescent days during July 1978 has been identified on 26 July using geomagnetic data from a network of 13 observatories in Indo-Russian longitude belt. This abnormality has been explained by invoking an additional clockwise loop current system centered around 5° dip latitude superimposed on the normal Sq current system centered at 20° dip latitude, thereby shifting the focus of the combined current system to 35° dip latitude. Probable causes of this additional currents in the low-latitude have been discussed.