GeomagneticModelData
GeomagneticModelData[] returns the current magnetic field data for the current location.
GeomagneticModelData[locationspec] returns the current magnetic field data for a location.
GeomagneticModelData[datespec] returns the magnetic field data for the specified time for the current location.
GeomagneticModelData[locationspec,datespec] returns the magnetic field data for the specified time and location.
GeomagneticModelData[locationspec,datespec,component] returns the component of the magnetic field for the specified time and location.
Examples
GeomagneticModelData[Entity["City", {"Paris", "IleDeFrance", "France"}]]Please visit the official Wolfram Language Reference for more details.