A large number of geomagnetic observatories throughout the world are members of INTERMAGNET. All these observatories send their data to Geomagnetic Information Nodes. In order to become an INTERMAGNET observatory (IMO) a strict set of conditions must be met. These conditions are described in the INTERMAGNET Technical Manual. Go to List of IMOs to follow the links to individual observatories. Details on location, instrumentation, type of data, and more are given in the pages for the individual observatories.
Map provided in collaboration with Geophysical Center of Russian Academy of Science