MagQuest Race to Revolutionize Earth's Magnetic Field Tracking

A global competition is under way to improve how we measure Earth’s magnetic field. The challenge, called MagQuest, aims to create a more accurate World Magnetic Model (WMM). This model supports everything from navigation systems to precise mapping and satellite operations. The WMM was last updated in early 2019 after unexpected shifts in the magnetic field. Normally, these updates happen every five years, but rapid changes forced an early revision. The model is vital for the World Geodetic System (WGS), which underpins GPS, aviation, and military navigation.

Three finalists are now launching satellites to test new sensing technologies. One uses the COSMO magnetometer, while another relies on the Io-1 system. The third, an NV quantum sensor, stands out for its extreme sensitivity. Unlike traditional methods, it detects magnetic fields at a quantum level, promising far greater precision.

The competition’s main goal is to enable faster updates—possibly even in real time. Currently, delays between measurements and model updates can cause errors in navigation and positioning. A more responsive system would reduce these risks and improve accuracy for industries worldwide. The winning technology will help refine the WMM, ensuring it keeps pace with Earth’s changing magnetic field. Faster, more precise updates could enhance satellite navigation, scientific research, and global mapping. The results of the contest are expected to shape future standards in geomagnetic measurement.