Introduction
Sunspot Activity Notes
Solar Observing CD-ROM
Sunspot Development
Disk Animations
Disk Drawings
Eclipses of the Sun
Glossary
Hydrogen Alpha
Latest Disk Animation
Latest Disk Drawing
Sunspot Measurements
Observing the Sun
Parallactic Angle
Software
Solar Books
Stonyhurst Disks
The Sun as viewed from the Earth
Sunspot Area
Sunspot Location
Sunspot Numbers
Sunspot Trends
Transits
Useful Links
What's New

Sunspot numbers derived from individual drawings are shown below in the form of a colour table from blue through to red via green and yellow. A sunspot number of 0 is , a sunspot number of 50 is , a sunspot number of 100 is , a sunspot number of 150 is while a sunspot number of 200 or more is . The numbers are given for each solar rotation so that active longitudes can be identified. Dates can be seen by placing the mouse icon over each coloured square.

Rotation

                                                

1985

       10th January 2002   12th January 2002     15th January 2002       19th January 2002                              

1986

             9th February 2002 10th February 2002       14th February 2002 15th February 2002 16th February 2002   18th February 2002                        

1987

 2nd March 2002 3rd March 2002   5th March 2002   7th March 2002   9th March 2002             16th March 2002 17th March 2002   19th March 2002   21st March 2002   23rd March 2002 24th March 2002 25th March 2002 26th March 2002 27th March 2002 28th March 2002 29th March 2002

1988

   31st March 2002     3rd April 2002 4th April 2002 5th April 2002 6th April 2002 7th April 2002 8th April 2002   10th April 2002 11th April 2002   13th April 2002 14th April 2002   16th April 2002 17th April 2002 18th April 2002 19th April 2002 20th April 2002 21st April 2002 22nd April 2002 23rd April 2002 24th April 2002 25th April 2002  

1989

   27th April 2002   29th April 2002   1st May 2002   3rd May 2002 4th May 2002   6th May 2002 7th May 2002 8th May 2002           14th May 2002 15th May 2002 16th May 2002 17th May 2002 18th May 2002 19th May 2002   21st May 2002 22nd May 2002  

1990

 23rd May 2002   25th May 2002   27th May 2002       31st May 2002 1st June 2002 2nd June 2002 3rd June 2002               11th June 2002       15th June 2002   17th June 2002 18th June 2002  

1991

 19th June 2002 20th June 2002 21st June 2002   23rd June 2002 24th June 2002 25th June 2002 26th June 2002 27th June 2002 28th June 2002 29th June 2002 30th June 2002 1st July 2002     4th July 2002         9th July 2002 10th July 2002 11th July 2002 12th July 2002 13th July 2002 14th July 2002 15th July 2002  

1992

   17th July 2002 18th July 2002 19th July 2002 20th July 2002   22nd July 2002   24th July 2002 25th July 2002 26th July 2002                                 12th August 2002

1993

 13th August 2002 14th August 2002   16th August 2002 17th August 2002 18th August 2002 19th August 2002   21st August 2002   23rd August 2002 24th August 2002 25th August 2002   27th August 2002 28th August 2002 29th August 2002   31st August 2002 1st September 2002           7th September 2002 8th September 2002  

1994

       12th September 2002 13th September 2002     16th September 2002         21st September 2002   23rd September 2002         28th September 2002 29th September 2002 30th September 2002 1st October 2002   3rd October 2002      

1995

 6th October 2002 7th October 2002                   17th October 2002   19th October 2002                 28th October 2002          

1996

   3rd November 2002 4th November 2002     7th November 2002   9th November 2002   11th November 2002         16th November 2002   18th November 2002               26th November 2002 27th November 2002    

1997

                   9th December 2002                                    

1998

                 4th January 2003 5th January 2003 6th January 2003     9th January 2003   11th January 2003 12th January 2003       16th January 2003     19th January 2003     22nd January 2003  

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Last updated on 18 April 2003.