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NOTICE: This section of the NWRA website will be closing down on 30 June 2024 after 28 years
of providing information to the Space Weather community. Thanks for all the fish. JAS

Note to SSNe Users


The effective sunspot number, or SSNe, products that have been available through this NWRA site since 1997 are no longer available as of 18 May 2024. This is due to a decision made in February 2024 by the National Center for Environmental Information (NCEI) Solar & Terretrial Physics Section to no longer provide real-time observations of the foF2 ionospheric parameter. We have as yet found no viable replacement for this source, so we are terminating the production of SSNe until a new source can be found.


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