World Magnetic Model (WMM)

The World Magnetic Model (WMM) is a detailed representation of Earth's magnetic field generated by movements within its core. It predicts how the magnetic North and South poles shift over time, which is essential for navigation systems like compasses, GPS, and aircraft. The WMM combines mathematical data to describe the field's intensity, direction, and changes, typically updated every five years to maintain accuracy. It helps ensure that navigational tools and systems accurately reflect Earth's magnetism, supporting safe and reliable navigation worldwide.