On Monday, April 10, 2017 at 6:19:27 PM UTC-4, wrote:
Yes, if you know about the theorem about combing a hairy ball the whole
thing seems less convincing!

..................


can global static electricity rises effect ground voltage ?

Probably on a global scale. Given all the various magnetic fields in and around the earth, given the differences in resistance from location to location (on land) and more, I am sure there are all sorts of micro-variations. But ground potential at any given point will be whatever is needed - that is, able to take 100% of what is 'above ground' relative to it. Which is what is measured (at that point) in any case, correct?

Peter Wieck
Melrose Park, PA