An intense electric current which occurs in a narrow belt in the lower ionosphere, especially in the region of strong auroral displays.
- When space weather stirs up the great electric current in the sky - the auroral electrojet - the magnetic field at the surface of the Earth starts to vary.
- The HAARP antenna as is it now configured modulates the auroral electrojet to induce ELF waves and thus could have an effect on the zonal winds.
- The auroral electrojet index, which measures the strength of the magnetic disturbances produced by currents in the ionosphere (associated with auroras), reached peak values of more than 2,000 nanoTesla.
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