The Earth's magnetic north pole is on the move, and while scientists aren't exactly sure what's behind the migration, they have taken the unprecedented step of issuing an unplanned update to the World Magnetic Model.
Why it matters: The World Magnetic Model, which is issued by the National Oceanic and Atmospheric Administration (NOAA), exists to help undersea and aircraft navigation, among other uses. It's normally updated every 5 years, and the last one was published in 2015. The next wasn't planned until the end of this year.
