How Aurora Generate Electrical Currents on the Earth Part I

Aurora range in altitude from 115 to 260 kilometers above the surface of the earth. As they change in brightness electric currents associated with and near to them change and create a changing magnetic field. This changing magnetic field generates electric currents in conductive materials such as the earth and in electric power lines and pipelines.

Demonstration of how a changing electrical current creates a magnetic field
   The instrument with the ball-shaped magnet, battery, coil of wire and switch is built to demonstrate how changing electric currents create magnetic fields.

The compass inside the ball will point to the earth's magnetic north pole. While holding the compass instrument in the palm of one hand use a finger from your other hand to push the electrical switch button located above the battery.

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