Reproduction of the SIDC sunspot data is allowed, but we kindly request that the source
is explicitly mentioned as follows:
credit: SIDC, RWC Belgium, World Data Center for the
Sunspot Index, Royal Observatory of Belgium, `year(s)-of-data'.
This is required for explicit reproduction of our data.
If our data is used for publications, a reference to
our online catalogue of sunspot data
is appropriate. We recommend that you use the following format, mentioning the current SIDC team,
in the list of references:
R.A.M. Van der Linden and the SIDC team, online catalogue of the sunspot index,
All publications that use and mention SIDC data are welcome to figure on this page.
If you wish to see your publication(s) listed below, send a message to
Ronald Van der Linden with the journal references and, if possible,
an appropriate link.
|Publication colour code|
|....||Publication in refereed scientific journal *|
|....||Non-refereed scientific publication: proceeding|
|....||Publication in journal for scientific vulgarisation|
*For refereed publications, access to links is provided for registered sites who
have subscriptions to the printed version of the journal.