Auroras occur around Earth's north and south geomagnetic poles in regions known as auroral ovals. The aurora is higher in the atmosphere than the highest jet plane flies. The lowest fringes are at least 40 miles above the Earth, while the uppermost reaches of the aurora extend 600 miles above the Earth. The space shuttle flies near 190 miles altitude. Although there are stories about the aurora seeming to reach down into the clouds or to the tops of mountains, these are either illusions or some phenomenon other than the aurora.
Some people believe that the aurora makes sound that accompanies the ripples and flow of the light.
If the aurora does make sound, the sound would have to be generated here on Earth by some electromagnetic effect. Any noise generated by the aurora would take a long, long time to travel all the way to Earth, and the air up by the aurora is much too thin to carry sound. Auroras occur because Earth's magnetic field interacts with the solar wind, a tenuous mix of charged particles blowing away from the sun. This wind from the sun sweeps by Earth in the interplanetary magnetic field which is produced by the sun. We are protected from the solar wind's direct effects by Earth's comet-shaped magnetosphere, where the Earth's magnetic field is distorted by the interplanetary magnetic field and the solar wind.