Web Service
Maps on in this webservice are produced using the
International Geomagnetic Reference Field (IGRF), 14th Generation, as released in Dec 2024.
Values are computed at mean sea-level (h=0) for every year spanning 1900-2030. Each magnetic field component can be shown.
Pure Python International Geomagnetic Reference Field (PPIGRF) was used to compute field values.
Model Background
The IGRF is a model of the Earth's main magnetic field that is updated every 5 years; the first version of the IGRF was created in 1965
The creation and updating of the IGRF is a collaborative project involving many countries, research institutions, and scientific organizations.
The British Geological Survey plays an important role in updating the IGRF and provides an online calculator