Stansted Airport in Essex, UK has renamed its runway because the position of the Earth’s magnetic North Pole has moved.
6 Jul 09 – The runway, known by pilots and air traffic controllers as 23/05 because of its location and compass heading, has been renamed 22/04 to reflect the new position and bearing.
“We’ve had to make this change due to the Magnetic North Pole slowly drifting on the Earth’s surface but our runway remains in a fixed position,” said Trevor Waldock, head of airside operations.
“The magnetic North Pole will continue to drift,” this article continues, “until it eventually switches with the magnetic South Pole.”
A magnetic reversal, in other words.
Thanks to Dan Hammer for this link