That means your compass is pointing about 40 miles closer to Russia than it did a year ago. About every five to 10 years, the shift in the planet’s magnetic pole builds up to the point where compass alignments and the direction of true north render some runway designations obsolete. The shift impacts some runways more than others, depending on which direction they face and when they were last numbered.
“Earth’s magnetic field is changing in time. And as far as we know, it has always been changing in time,” geophysicist Jeffrey Love, with the U.S. Geological Survey in Colorado, told Discovery News.
Looks like North will be Russia soon.