john wayne airportSANTA ANA ( – John Wayne Airport is set to become the first airport in Southern California to re-number its runways in response to Earth’s changing magnetic field.

Orange County Register reporter Mary-Ann Milbourn told KNX 1070′s Chris Sedens and Diane Thompson workers at John Wayne will re-number the airport’ s two runways and update about two dozen directional signs to adjust for a periodic shift in magnetic north, the point at the top of the Earth that determines compass headings.

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