[CurlyDave]

Popular lore is that EMP can occur anywhere. In reality, EMP occurs only in Space, and then only after a nuclear detonation in Space.

Try this link for some real info:

http://science.howstuffworks.com/framed.htm?parent=e-bomb.htm&url=http://www.villagevoice.com/issues/0306/smith.php

While it is true that EMP effects were first noted after very high altitude nuclear tests, neither a nuclear bomb nor space is necessary for an EM pulse.

[Southack]

"Harnessing the phenomenon without producing a multi-megaton explosion has proven more elusive, but some still think this is a legitimate option."

It's never been done, except with a nuke in space. Even your link can't find an example of it being done anywhere else.

Here's a clue: IONosphere.

Ions. Think: electricity.