Mystery BoomsStrange Sounds by SiteSound South AmericaStrange SoundsStrange Sounds NewsThe Hum Strange sounds in Mexico, April 18, 2012 By Strange Sounds - Apr 20, 2012 0 908 Facebook Twitter Pinterest Linkedin ReddIt WhatsApp This “singing Earth” sound has been recordered in Mexico on April 18, 2012 Author’s comments: The sounds of Apocalypse.