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The International Service of Geomagnetic Indices (ISGI) is in charge of the elaboration and dissemination of geomagnetic indices, and of tables of remarkable magnetic events, based on the report of magnetic observatories distributed all over the planet, with the help of ISGI Collaborating Institutes. The interaction between the solar wind, including plasma and interplanetary magnetic field, and the Earth's magnetosphere results in a transfer of energy and particles inside the magnetosphere. Solar wind characteristics are highly variable, and they have actually a direct influence on the shape and size of the magnetosphere, on the amount of transferred energy, and on the way this energy is dissipated. It is clear that the great diversity of sources of magnetic variations give rise to a great complexity in ground magnetic signatures. Geomagnetic indices aim at describing the geomagnetic activity or some of its components. Each geomagnetic index is related to different phenomena occurring in the magnetosphere, ionosphere and deep in the Earth in its own unique way. The location of a measurement, the timing of the measurement and the way the index is calculated all affect the type of phenomenon the index relates to. The IAGA endorsed geomagnetic indices and lists of remarkable geomagnetic events constitute unique temporal and spatial coverage data series homogeneous since middle of 19th century.
CAD INASAN was established in 1980 as a branch regional center of the Centre de Donnes Stellaire (CDS). Since that time, the CAD has been working to distribute, create and store astronomical data according to the requirements of time, specifics of techniques and requests of the Russian astronomical community. At present, the staff of the CAD is maintaining mirrors of several major astronomical data resources, keeping a record of Russian astronomical data resources, and is working to create new astronomical data resources. Since 2002, we are the important part of the Russian Virtual Observatory project (member of the International Virtual Observatory Alliance - IVOA). The CAD archive is based on astronomical catalogues received from Strasbourg since 1980. Several well known astronomical archives and databases are also stored at INASAN (e.g. VizieR, ADS, INES, VALD). At present CAD coordinates work on the Russian Virtual Observatory (RVO) project