Polar shift: Earth being turned upside down?

Pilots, boaters adjust to shift in magnetic north

Magnetic north, the point at the top of the Earth that determines compass headings, is shifting its position at a rate of about 40 miles per year. In geologic terms, it's racing from the Arctic Ocean near Canada toward Russia.

As a result, everyone who uses a compass, even as a backup to modern GPS navigation systems, needs to be aware of the shift, make adjustments or obtain updated charts to ensure they get where they intend to go, authorities say. That includes pilots, boaters and even hikers.