Historical database of propagation indexes

This database contains information of the geomagnetic Kp and ap indexes at 3 hour intervals since 1932, plus the resulting Ap index. It also contains daily details of SSN (Sun spots) and SFI (Solar flux) since 1947. (Brief description of propagation indexes)

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Database is not updated in real time yet, but most recent indexes will be added regularly. Currently contains information up to 31-May-2017.
Source of data is NOOA's NGDC

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