[Antennas] Ground Conductivity

[rbethman]

This is not uncommon.  I've seen the equivalent with lightning hitting 
dry sandy ground near the runway of a military airfield.  All the runway 
lighting cable buried underground fused with the soil and came out like 
black glass around three to four times the diameter of the actual 
cable.  We kept a piece up on the wall of the shop.

It really can't be predicted.

Bob - N0DGN

Hue Miller wrote:
> I was told this about one of the towns I service
> as inside telecom worker: a power line - not sure 
> how high voltage - fell to the ground. It landed over
> a buried telephone cable about 3 foot deep. It
> didn't damage the line under the place it dropped,
> but at a box a couple hundred feet away, a 
> several-pair splice was burned. In the opposite
> direction, toward the telco central office 1500 
> feet away, a fuse was burned out and a circuit
> card died. I wouldn't have thought there would
> be much of a voltage spike left undissipated at
> the 3 foot depth of the cable. The earth up here
> in this western Oregon valley has pretty good
> conductivity. I wondered whether the same 
> thing would have happened in some dry rocky
> soil like maybe Arizona. -Hue Miller
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