IGRF-13

The International Geomagnetic Reference Field (IGRF), 13th generation, is a model that describes the core field from 1900 to 2025. It was developed by an international team of scientists, under the auspices of the International Association of Geomagnetism and Aeronomy (IAGA).

HDGM2023 and HDGM2023-RT

The High Definition Geomagnetic Model 2023 (HDGM2023) is a global, high-resolution model (degree 790) of the Earth's geomagnetic main and crustal fields, providing magnetic field values (total field, dip, and declination) at any point above or below the Earth's surface for the year 2023. An optional extension to the HDGM is the HDGM-RT, which provides near real-time estimates of the external disturbance field caused by the solar wind and includes a magnetic field model for daily variations due to ionospheric current systems.