Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An electric current that moves in an ionized layer above the equator in the earth's upper atmosphere.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

electro- + jet (stream).

Examples

  • Called "sporadic E," these clouds of ionized gas are frequently observed at midlatitudes but are more rarely observed in low latitudes, most likely because signals become obscured by the intense equatorial electrojet, which is a narrow ribbon of current that flows east above the geomagnetic equator during the day.

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