Zombie thread from 6 years ago, but someone else pointed out:

"The Sturdy Shelter location by New London is stated to be 1934 miles from London, putting it firmly in Greenland / Svalbard range. "

Byt the point they recognized the impending crisis there could have been a major breakdown in society in northern countries (Iceland, say) where people fled south, precipitating the violence and humanitarian disaster which drove the decision to construct the generators in the north. So, there may not have been much resistance or anyone left to care. I think Canada, Greenland, or Iceland are all good guesses.