Talk:Telluric current
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It seems like the link to the Magnetic field article should go to the Earth's magnetic field article, which is more specific and pertinent. From there, if you really just want to know about magnetic fields, it's linked.
[edit] Crustal Only?
The article contradicts itself, describing the currents moving near the surface only in two places and through the "mantle":
"...and travel over large areas at or near the surface of the Earth."
"Telluric currents are phenomena observed in the Earth's crust and mantle."
"Telluric currents flow in the surface layers of the earth."
[edit] Telegraph
What does this mean -- clarify -- was there some ground transmission method that was used during sunspots or whatever? Why wasn't it used all the time? How did the telegraph system switch from using wires to the ground when needed?
"Utilization of these electromagnetic effects has been reported in the United States as far back as 1859. United States telegraph lines were operated by such natural induced currents (during geomagnetic disturbances)." —The preceding unsigned comment was added by 75.6.254.146 (talk) 10:35, 23 December 2006 (UTC).
Seems to be a power source -- see Earth battery -- I am removing reference to geomagnetic disturbances and reworking a bit. Correct if inaccurate.
[edit] Human Activity
After mentioning magnetosphere and lightning, needs to mention what human activities create currents. —The preceding unsigned comment was added by 75.6.226.118 (talk) 10:57, 23 December 2006 (UTC).
