The working group Sun is one of the sections of the belgian amateur-astronomers association VVS (= Vereniging Voor Sterrenkunde) and groups all the members who are interessted in the study of our nearby star, the sun.
On this website you can find all the information about this working group and his members. You have also an online database with their observations. Take also a look to their monthly newsletter.

Take a look at a very nice article writen by Kevin Smith for the magazine " The Practical astronomer " !