Schumann Resonance...

[Exonerate]

Ok, wtf is this thing? I've seen it mentioned in Serial Experiments: Lain, but have always kinda dismissed it as a plot device or something. And now there's the 2012 site posted, which also mentions this. My questions is what exactly is the schumann resonance frequency, and what is it's significance? Why the hell are conspiracy theorists so interested in this?

[Warspite]

I think it's the frequency of lightning (my memory may fail me), every bolt of lightning releases radio waves in a specific frequency, hence the Schummann Resonance, and it can be heard on any radio throughout the world, usually it's a rythmic cacophony, since at nay given time there is a lightning bolt being generated somewhere on the planet.
As for wackos liking it, why not? It's mysterious for the layman.

[kojikun]

Wikipedia:

The Schumann resonance is a set of peaks in the ELF portion of the Earth's electromagnetic field spectrum.

Scientists believe that the Schumann resonance is due to the space between the surface of the Earth and the ionosphere acting as a resonant cavity that is then excited by energy from lightning strikes.

The lowest-frequency (and highest-intensity) mode of the Schumann resonance is at a frequency of approximately 7.8 Hz.

The phenomenon is named after W. O. Schumann, who predicted this phenomenon in the 1950s, and helped detect its existence.

[Joe]

From Thought Experiments Lain:

Put very simply, the resonance frequencies of the Earth's electromagnetic field as measured by W.O. Schumann. 7.83 Hz (which is an average of several measurements) is the figure most often cited as the fundamental (base) Schumann Resonance frequency in that electromagnetic waves of that frequency can propagate extremely quickly with little attenuation around the planet within what is known as the Schumann Cavity (a thin membrane of non-conductive air between the surface of the planet and the ionosphere). Schumann Resonance frequencies fall in the range of 6-50 Hz.