Please refer to the IAGA web page
A collection of related articles is available here.
Model field at a point by IGRF
Transformation of Coordinate
[Geographic <-> Geomagnetic (Dipole)]
Coefficients (1900-2020):
Html Version
Text Version
MS Excel Version
Fortran program by IAGA V-MOD Geomagnetic Field Modeling
Magnetic Charts (2020.0)
| Geomagnetic Element | Mercator Projection | Northern Hemisphere | Southern Hemisphere |
|---|---|---|---|
| Total Intensity (F) | GIF, PDF | GIF, PDF | GIF, PDF |
| Declination (D) | GIF, PDF | GIF, PDF | GIF, PDF |
| Inclination (I) | GIF, PDF | GIF, PDF | GIF, PDF |
| Horizontal Component (H) | GIF, PDF | GIF, PDF | GIF, PDF |
| Vertical Component (Z) | GIF, PDF | GIF, PDF | GIF, PDF |
| Northward Component (X) | GIF, PDF | GIF, PDF | GIF, PDF |
| Eastward Component (Y) | GIF, PDF | GIF, PDF | GIF, PDF |
Animation of secular variation in geomagnetic total
intensity for the last 400 years. (392kB)