Telluric current, a natural electrical current in the Earth's crust
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Telluric contamination, contamination of astronomical spectra by the Earth's atmosphere (also can be referred as Telluric lines or Telluric bands)
In William Hope Hodgson's novel The Night Land, the "Earth-Current", a powerful telluric current, is the source of power for the Last Redoubt, the arcology home of man after the Sun has died.
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Telluric currents are also used as a means of travel by the woman Hsien-Ko and her minions in the Doctor Who "Missing Adventures" novel, The Shadow of Weng-Chiang, by David A McIntee.