Telluric currents are natural electric currents that flow in the Earth, primarily in the conductive layers of the Earth's crust and mantle. These currents are generated by various factors, including atmospheric phenomena (like lightning strikes), solar activity (such as solar winds and geomagnetic storms), and natural variations in the Earth's magnetic field. Telluric currents can be influenced by the Earth's geology, including the composition and structure of rocks, as well as the presence of water and minerals that can conduct electricity.
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