Earth's crust and mantle are host to telluric currents, with around 32 mechanisms generating them, primarily geomagnetically induced currents caused by changes in Earth's magnetic field due to solar wind interactions with the magnetosphere or solar radiation's effects on the ionosphere.
[7][8] It is recognized that a low frequency window (LFW) exists when telluric currents pass through the Earth's substrata.
[9] The main plot of the 1988 novel Foucault's Pendulum by Umberto Eco revolves around conspiracy theorists who believe that they are searching for the Umbilicus Mundi (Latin for "The Navel of the World"), the mystic "Center of The Earth" which is supposed to be a certain point from where a person could control the energies and shapes of the Earth, thus reforming it at will.
The novel takes this even further by suggesting that (in the view of the conspiratorialists) monuments like the Eiffel Tower are nothing more than giant antennas related to these energies.
[10] Telluric currents, along what are effectively ley lines, are discovered to be a means of mysterious communication in Thomas Pynchon's 1997 novel Mason & Dixon and are associated with the book's Chinese-Jesuit subplot.