Counting Sunspots and Sunspot Inflation

Guest post by Dr. Leif Svalgaard The official sunspot number is issued by SIDC in Brussels http://sidc.be/sunspot-data/ . The [relative] sunspot number was introduced by Rudolf Wolf http://en.wikipedia.org/wiki/Rudolf_Wolf  in the middle of the 19th century. He called it the ‘relative’ number because it is rather like an index instead of the actual number of spots…

About these ads