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Statistical survey of day-side magnetospheric current flow using Cluster observations: bow shock

We present the first comprehensive statistical survey of the day-side terrestrial bow shock current system based on a large number of Cluster spacecraft bow shock crossings. Calculating the 3-D current densities using fluxgate magnetometer data and the curlometer technique enables the investigation...

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Bibliographic Details
Published in:Annales geophysicae (1988) 2018-08, Vol.36 (4), p.1073-1080
Main Authors: Liebert, Evelyn, Nabert, Christian, Glassmeier, Karl-Heinz
Format: Article
Language:English
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Summary:We present the first comprehensive statistical survey of the day-side terrestrial bow shock current system based on a large number of Cluster spacecraft bow shock crossings. Calculating the 3-D current densities using fluxgate magnetometer data and the curlometer technique enables the investigation of current locations, directions, and magnitudes in dependence on arbitrary IMF orientation. In case of quasi-perpendicular shock geometries we find that the current properties are in good accordance with theory and existing simulation results. However, currents at quasi-parallel shock geometries next to the foreshock region underlie distinct variations regarding their directions.
ISSN:1432-0576
0992-7689
1432-0576
DOI:10.5194/angeo-36-1073-2018