Auroral kilometric radiation

Auroral kilometric radiation (AKR) mainly comes from cyclotron radiation from electrons orbiting around the magnetic field lines of the Earth. The AKR has a frequency of between 50 and 500 kHz and a total power of between about 1 million and 10 million watts. The radiation is highly absorbed by the ionosphere and therefore can mainly be measured by satellites positioned at vast heights but the article ‘Ground-level detection of auroral kilometric radiation‘ published by James LaBelle and Roger R. Anderson in 2011 proves it could be also mesured on the Eart.