From Bureau of Meteorology
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SWS Sunspot Numbers (1700 onwards)

Created 07/10/2024

Updated 07/10/2024

JSON RDF ISO19115-3 XML

The SWS sunspot number tables are based on the observed (definitive and provisional) monthly mean sunspot numbers from WDC-SILSO, Royal Observatory of Belgium, Brussels (sidc.oma.be/silso/home). The observed values are smoothed using a 13 month running filter (the first and last values have half weighting). Estimated values have an "e" suffix and are calculated from observed monthly and predicted smoothed sunspot numbers. Observed smoothed values precede the estimated values, while predicted smoothed values follow the estimated values.

The 10.7 cm solar radio flux values, including the "observed" values, are obtained from sunspot numbers using a statistical conversion. They are therefore described as "equivalent" solar radio flux values.

SPECIAL NOTE In June 2015, WDC-SILSO, Royal Observatory of Belgium, Brussels, adjusted their original observed sunspot numbers (Version 1.0) to a Version 2.0 series in which the sunspot numbers are higher. In the Version 1.0 data series, some of the sunspot numbers were weighted. The new (Version 2.0) sunspot numbers are unweighted sunspot number counts (for more information see: www.sidc.be/silso/home). The Bureau of Meteorology SWS solar cycle prediction is now based on the Version 2.0 values. As a result of the WDC-SILSO recalibration, the observed monthly sunspot numbers are higher. This is also reflected in the tables of smoothed sunspot numbers and equivalent 10.7 cm solar flux and the solar cycle graph.

Data frequency :Daily figure;

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Additional Info

Field Value
Title SWS Sunspot Numbers (1700 onwards)
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/c6143c5e-f82f-460a-9a4f-87e391a3f1d6
Contact Point
Bureau of Meteorology
sws_wdc@bom.gov.au
Reference Period 24/06/2017
Geospatial Coverage {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "SWS Sunspot Numbers (1700 onwards)". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/sws-sunspot-numbers-1700-onwards

Original dataset
Dataset copies

No duplicate datasets found.