Terminating Shielded twisted pair

If you drill down a rod just to the edge of the iron core from different locations on earth, the huge currents caused by solar activity (such as the Carrington event) will cause voltage drops in the iron core. Thus in different places _on_ the iron core will have different potential. You really have to drill through the iron core to a single point in the center of the earth ;-),

You still have the problem of transferring the potential from the center of earth to the surface, without letting the magnetic field variations causing induced voltages to the connection rod.

Has anyone managed to measure the voltage?

Joe Gwinn

Gas, oil and electric companies measures the currents introduced to their pipelines and high voltage lines. If a solar CME (Coronal Mass Ejection) hits the Earth, auroras are visible even at low latitudes. This also induces very low frequency (< 1 Hz) currents into large networks. Electric companies call these slow variations "DC" and complain that these current saturates their transformer cores

I've ordered some longer DVM leads from Amazon.

Hopefully these ones:

Magic.

Cheers

Phil Hobbs

(They have custom ones, but I dunno if they can supply 6000 km lengths.)