Very interesting. Atmospherics might also be useful as an RNG or possibly a trustworthy public randomness beacon.<p>&quot;There are an average of 45 lightning flashes per second around the world. [...] The radio signature (like a fingerprint) of a lightning strike can be detected around the world [...] [R]eceiving ELF&#x2F;VLF waves allows us to determine the exact location of most lightning strikes on the whole planet, with just a small number of ELF&#x2F;VLF receivers [...]&quot;<p><a href="http:&#x2F;&#x2F;vlf.stanford.edu&#x2F;research&#x2F;introduction-vlf" rel="nofollow">http:&#x2F;&#x2F;vlf.stanford.edu&#x2F;research&#x2F;introduction-vlf</a><p><a href="http:&#x2F;&#x2F;vlf.stanford.edu&#x2F;research&#x2F;global-lightning-geo-location" rel="nofollow">http:&#x2F;&#x2F;vlf.stanford.edu&#x2F;research&#x2F;global-lightning-geo-locati...</a>