Gosh, I wasn't expecting any replies, but just to recapp I posted various replies to OP's question on that other forum, they pretty much tally up with what you guys have just said ie: an EMP by it's very wordly description means just that ie: a very short risetime/quick rate of change etc. Although the original posters idea is easy to snub the subject arising are very interesting.
Earth directed solar events as has been pointed out can have a considerable effect on electrical transmission systems on the planet, and have been well documented as have the effects on electromagnetic propagation which I am sure all of us radio guys are familiar with. metaliferrous deposits aside, the mag field below ground is more or less the same as on suface, after all as far as I know that is where it comes from.
Here is a link to the on going "discussion" home page, if you look for the latest forum posts you should find it ok if interested, you should be able to view without signing up, however if you are interested in things underground then feel free to sign up, it's free and no crap mail.
http://www.aditnow.co.uk/
Forgot to add: the title of the post is... buying an old mine....then scroll through to find it.
Lawrence.
Earth directed solar events as has been pointed out can have a considerable effect on electrical transmission systems on the planet, and have been well documented as have the effects on electromagnetic propagation which I am sure all of us radio guys are familiar with. metaliferrous deposits aside, the mag field below ground is more or less the same as on suface, after all as far as I know that is where it comes from.
Here is a link to the on going "discussion" home page, if you look for the latest forum posts you should find it ok if interested, you should be able to view without signing up, however if you are interested in things underground then feel free to sign up, it's free and no crap mail.
http://www.aditnow.co.uk/
Forgot to add: the title of the post is... buying an old mine....then scroll through to find it.
Lawrence.
