Sferic Sounds from NASA!

so cool!: http://spaceweather.com/glossary/inspire.html
"Earth Song," a NASA article about where the sounds come from: http://science.nasa.gov/science-news/science-at-nasa/2001/ast19jan_1/

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raw material: http://www.forte.lanl.gov/science/publications/2001/Heavner_2001_1_Leader.pdf