“The slowly drifting location of Earth’s magnetic north pole means the Hillsboro Airport’s main runway underwent a name change early this week,” says this article in the Hillsboro (Oregon) Argus.
Because runways are designated according to the points on a compass, the changing location of true magnetic north means that the runway sometimes needs to be renamed.
“Experts say magnetic north is slipping slowly from above the Arctic Ocean in a north-northwestern direction toward Siberia, at about 34.2 miles per year. When the magnetic points were recalibrated, Hillsboro, like some other airports, had to renumber its main runway.”
The Hillsboro Airport is also known as the Portland-Hillsboro Airport.
See entire article:
Thanks to Robert Stom for this link