One of my favourite things about the Schumann resonances is how humanity effectively did an experiment on them: the Starfish Prime nuclear test several hundred

One of my favourite things about the Schumann resonances is how humanity effectively did an experiment on them: the Starfish Prime nuclear test several hundred km above Hawaii dumped a load of charged particles into the ionosphere, destroying several satellites in space at the time, and, yes, changing the spectrum of the Schumann resonances. This article made me very glad for Faraday cages!