Solar Influences Data analysis Center
For information :
E_mail:
Ronald.Vanderlinden@oma.be
ROYAL OBSERVATORY OF BELGIUM
Av. Circulaire, 3 - B-1180 BRUSSELS
SUNSPOT DATA
Provisional daily International Sunspot Numbers for last month
(updated every first of the month)
Provisional international normalized hemispheric sunspot numbers
(updated every first of the month)
GRAPHICS
(updated every first of the month)
ASCII FILES (updated every first of the month) (See
Readme file
for explanations)
daily sunspot number
monthly and monthly smoothed sunspot number
yearly sunspot number
other data
Credit and publications using SIDC data
Last modified: August 28, 2003