GFZ German Research Centre for Geosciences operates and supports geomagnetic observatories worldwide. We provide unique and important scientific data for the investigation of Earth's interior and near-Earth space, as well as for navigation, exploration and the monitoring of space weather.
IGRF declination calculator after the international geomagnetic reference field, generation 12 from 1900 - 2020.
Current Models of the Earth's magnetic main and lithospheric field. continuous, respectively long term, epoch based or constant.
The GEOMAGIA50 database is an international collaboration to provide easy access to published archeomagnetic/volcanic and sediment paleomagnetic and chronological data for the past 50 ka.