OT - Recording Auroras

[Christian Aeschliman <ozwanderlust@xxxxxxxxxxx>]

"This is a presentation of Earth's natural radio emissions that occur in the extremely-low-frequency to very-low-frequency (ELF-VLF) radio spectrum--specifically, at AUDIO frequencies between approximately 100 to 10,000 cycles-per second (0.1 - 10 kHz). 

Unlike sound waves which are vibrations of air molecules that our ears are sensitive to, natural radio waves as received at ground-level are vibrations of electric and magnetic energy (electromagnetic waves) which--though occurring at the same frequencies as sound--cannot be listened to without an audio-frequency ELF-VLF radio receiver to convert the natural radio signals directly into the same sound frequencies. Another amazing realm of nature is thus ready to be explored and observed."

http://www-pw.physics.uiowa.edu/mcgreevy/



Sounds of the Magnetosphere:
http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/home.html