The Contribution of a Geophysical Data Service: The International Service of Geomagnetic Indices
Geomagnetic indices are basic data in Solar-Terrestrial lovesense 3 physics and in operational Space Weather activities.The International Service of Geomagnetic Indices (ISGI) is in charge of the derivation and dissemination of the geomagnetic indices that are acknowledged by the International Association of Geomagnetism and Aeronomy (IAGA, an IUGG