About the relationship between auroral electrojets and ring currents

The relationship between the storm-time ring current and the auroral electrojets is investigated using IMAGE magnetometer data, <i>D<sub>St</sub></i> and H-SYM, and solar wind data. Statistical results as well as the investigation of single events show that the auroral ele...

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Bibliographic Details
Main Authors: A. Grafe, Y. I. Feldstein
Format: Article
Language:English
Published: Copernicus Publications 2000-08-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/18/874/2000/angeo-18-874-2000.pdf
Description
Summary:The relationship between the storm-time ring current and the auroral electrojets is investigated using IMAGE magnetometer data, <i>D<sub>St</sub></i> and H-SYM, and solar wind data. Statistical results as well as the investigation of single events show that the auroral electrojets occur also during nonstorm conditions without storm-time ring current development and even during the storm recovery phase of increasing <i>D<sub>St</sub></i>. A close correlation between electrojet intensity and ring current intensity was not found. Though the eastward electrojet moves equatorward during the storm main phase there is no unequivocal relationship between the movement of the westward electrojet and the ring current development. All these results suggest that the auroral electrojets and the ring current develop more or less independently of each other.<br><br><b>Key words: </b>Magnetospheric physics (magnetosphere-ionosphere interactions; storms and substorms)
ISSN:0992-7689
1432-0576