IGRF-14

The International Geomagnetic Reference Field (IGRF) is a standard mathematical description of the Earth's main magnetic field. It is used widely in studies of the Earth's deep interior, crust, ionosphere, and magnetosphere. The model is developed and maintained by the International Association of Geomagnetism and Aeronomy (IAGA). The coefficients for the 14th generation of IGRF model were finalized by an IAGA task force in November 2024. The IGRF is the product of a global collaborative effort between magnetic field modelers and the institutes involved in collecting and disseminating magnetic field data collected from satellites, observatories, and surveys around the world.

This is the fourteenth generation of the model, IGRF-14, which covers the period from 1900 to 2030. It incorporates the Definitive Geomagnetic Reference Field (DGRF) for 2020.0, which supersedes the preliminary estimate for that epoch provided in IGRF-13.

For more information, see https://www.ncei.noaa.gov/products/international-geomagnetic-reference-field

The model coefficients are provided in three formats:
- igrf14coeffs.txt - traditional format compatible with previous IGRF releases
- IGRF14coeffs.xlsx - Excel equivalent of the above
- IGRF14.shc - SHC format compatible with ESA Swarm mission software (see description here)

NB: "Version v2" on the Zenodo record includes a fix to the format of the .shc file.

You can cite the Zenodo record (i.e. the IGRF-14 coefficients themselves) as: 
International Association of Geomagnetism and Aeronomy. (2024). IGRF-14. Zenodo. https://doi.org/10.5281/zenodo.14012302

When using IGRF-14, you should cite: 
Beggan et al. International geomagnetic reference field: the fourteenth generation. Earth Planets Space 78, 127 (2026). https://doi.org/10.1186/s40623-025-02360-0

A list of journal articles can be found as a topical collection in "International Geomagnetic Reference Field - The Fourteenth Generation" in Earth, Planets and Space.