Sunspot Number Archive

There are many special Solar Telescopes around the world, which are specially designed to take daily measurements of Solar Activity.

We have collected together some of this data for you to work with, in the form of the change in the number of sunspots over time. You can select the data you want to look at with this form and then download the data and use a spreadsheet or some other software to

If you are not sure how to use this data, why not try this Sunspot Workshop.