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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)
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