a current of ions existing in the upper atmosphere, moving with respect to the surface of the earth, and causing various auroral phenomena.
Origin of electrojet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a narrow belt of fast-moving ions in the ionosphere, under the influence of the earth's magnetic field, causing auroral displays
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012