Abstract

A new method based on covariance analysis is used to map the current patterns associated with variations of the equatorial electrojet. These patterns show that the electrojet is the expected equatorial enhancement of a coherent, large scale current system. This current system is further broken down and found to be composed of a part which is identified as the standard lunar current system and a part which is probably due to localized dynamo region wind fluctuations near the equator. Neither of these parts can be identified as the Sq current system. The problem will be investigated further in the second part of this study.

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