International Service for Geomagnetic Indices (ISGI)

Service international des indices géomagnétiques

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Founded 1906, as Central Bureau for Terrestrial Magnetism, for the calculation of the "International Magnetic Character". Hosted by the 'Koninklijk Nederlands Meteorologisch Instituut', De Bilt (Netherlands), until 1987. Moved to France following decision during IUGG meeting, 1987, Vancouver BC (Canada), and hosted by 'Institut de Physique du Globe de Paris'. Moved, 1990, to 'Centre d'étude des environnements terrestres et planétaires', Saint-Maur-des-Fossés (France), which was replaced in 2009 by 'Laboratoire atmosphères, milieux, observations spatiales (LATMOS)', Guyancourt (France). Moved to 'EOST', 2015.


Derive, publish and disseminate indices of International Association of Geomagnetism and Aeronomy (IAGA).


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Executive Committee; Advisory Board.


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Relations with Non-Governmental Organizations

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Type I Classification

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Subjects *

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UN Sustainable Development Goals **

GOAL 9: Industry, Innovation and Infrastructure



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* Subject classification is derived from the organization names and aims.
** UN SDGs are linked to the subject classification.

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