"Auroral Chorus IV" is my largest online natural VLF radio-phenomena compendium album on Internet Archive (begun in 2010 and ongoing uploads to 2017).

More than half of the MP3 audio files on this page are field-recordings of Earth's "Natural VLF Radio" signals and are quite beautiful. //

search: 259 gorvgeious_whistlers_Fish_Rock_Rd_nCA_02Apr94_pt1 -- VLF including Omega audio