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Schematic diagram showing Cluster, Swarm and regions of the magnetosphere

Date: 30 June 2015
Satellite: Cluster
Copyright: ESA

This schematic figure illustrates the location of the four Cluster and three Swarm satellites during a study carried out in April 2014.

During this study, the seven spacecraft joined forces to simultaneously measure the properties of Earth's magnetic field at two different altitudes.

A number of striking similarities in the behaviour and structure of the field-aligned currents detected at each altitude were found, despite their vastly different locations. Field-aligned currents (FACs) - indicated in yellow - flow along Earth's magnetic field lines, transferring energy from region to region.

Last Update: 30 June 2015

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