UT variation of internal Sq currents and the oceanic effect during 1980 March 1–18

Abstract

Summary. UT variation of the internal part of Sq currents is examined using the geomagnetic data during 1980 March 1–18, and the effect of the ocean is found. The ratio of the internal currents to the external increases when the external current vortex comes above the Atlantic and Pacific Oceans, and the internal current vortex shifts to the oceans when the external vortex approaches the edge of the oceans. The existence of the ocean increases the total induced current by about 30 per cent and this amount is consistent with model calculations for Sq by previous workers. Copyright © 1985, Wiley Blackwell. All rights reserved