https://www.usgs.gov/software/usgs-geomagnetism-programinterpolated-magnetic-perturbations-geomag-imp
Geomag-IMP is an open-source Python library for interpolating magnetic field perturbations onto geographic coordinates. Geomag-IMP provides two (for now)...
u susgsgeomagnetismmagneticperturbations
https://www.msoldris.cz/akce/geomat/
geomagcz
https://geomag.colorado.edu/about-us
usgeomag