You maybe meant "magnetic north", not "true north"? Or if you meant what you wrote, then fairly safe to rule out magnetism from being involved! (I suspect it's

You maybe meant "magnetic north", not "true north"? Or if you meant what you wrote, then fairly safe to rule out magnetism from being involved! (I suspect it's not involved either way, but I don't know anything) (Explanation of the difference between true and magnetic norths: https://www.rmg.co.uk/stories/topics/true-north-magnetic-north-whats-difference https://www.rmg.co.uk/stories/topics/true-north-magnetic-nor... )