 The International Service of Geomagnetic Indices (I.S.G.I.) is in charge of the elaboration and dissemination of geomagnetic indices with data provided by geomagnetic observatories.
DATA ACQUISITION AND PROCESSING
- Definitive, provisional, quick look, and estimated values
- Derivation schemes of IAGA geomagnetic indices
- AE index
- Dst index
- K-derived planetary indices
- DATA DISSEMINATION :
- On-line services
- Printed Bulletins All the printed bulletins are available on request
The I.S.G.I. Publication Office circulates a monthly bulletin contains the provisional values of planetary magnetic indices (am, aa, Kp, and Dst) and the list of the quiet magnetic days of the month. It is normally sent six to eight weeks after the end of the current month. It also publish the yearly IAGA Bulletin 32 series, which contain the definitive values of the I.A.G.A. indices.
The Analysis Centre for Geomagnetism and Spacemagnetism, Kyoto University, publishes and distributes the provisional Dst index on a monthly basis, the provisional AE index in Prompt Reports, and the final AE index in Data Books.
The Kp and Kp-related geomagnetic indices are distributed on tables edited half-monthly. The definitive values of these indices are circulated on monthly tables, together with musical diagrams of Kp, semi graphic tables of C9, and lists of the quietest and most disturbed days of the month.
The provisional values of geomagnetic indices are also published in the Solar Geophysical Data NOAA/NGDC reports, and in Journal of Geophysical Research (Editor: H. Coffey).
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