Anonymous ID: 230193 Sept. 20, 2020, 9:49 a.m. No.10721610   🗄️.is đź”—kun

>>10721514

>Schumman

>>10721525

>>10721553

 

EMP stuff?

'The Earth–ionosphere waveguide behaves like a resonator at ELF frequencies and amplifies the spectral signals from lightning at the resonance frequencies.'

https://en.wikipedia.org/wiki/Schumann_resonances

Volland, H. (1984). Atmospheric Electrodynamics. Springer-Verlag, Berlin.