IGRF (International Geomagnetic Reference Field)

The International Geomagnetic Reference Field (IGRF) is a precise, standardized model of Earth's magnetic field used by scientists and engineers. It represents the magnetic environment created mainly by movements within Earth's core, along with influences from the crust and external sources like solar wind. The IGRF is updated roughly every five years to reflect changes, enabling accurate navigation, satellite operations, and scientific research. Essentially, it provides a consistent baseline for understanding and predicting Earth's magnetic behavior across the globe, crucial for everything from compass accuracy to studying Earth's interior.