A ring current is an electric current carried by charged particles trapped in a planet`s magnetosphere. It is caused by the longitudinal drift of energetic (10–200 keV) particles. ==Earth`s ring current== Earth`s ring current is responsible for shielding the lower latitudes of the Earth from magnetospheric electric fields. It therefore has a ......
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http://en.wikipedia.org/wiki/Ring_current
A very spread-out electric current circling around the Earth, carried by trapped ions and electrons.
Found on
http://www.braeunig.us/space/glossary.htm
(from the article `geomagnetic field`) Farther out, at 4 Re and beyond, is the next major source of magnetic field, the ring current. At this distance almost all atmospheric particles are ... The ring current is produced by the drift around the Earth of charged particles of the outer Van Allen radiation belt. During quiet conditions the...
Found on
http://www.britannica.com/eb/a-z/r/51
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