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Portable Network Graphic  |  2003-02-25  |  22.3 KB  |  512x385  |  8-bit (71 colors)
   ocr: SUNSPOT CYCLE The number of the spots varies cyclically over a period of 11 years and reflects the variation of the general activity level of the Sun. The previous sunspot mini- mum occurred in 1994 and the sunspot number will reach a new maximum in 2000-2001. SUNSPOT CYCLE hot sun AD 170010: 7995 cool sun 200r 1001 - 720t - I I - - - a 80 y alinbladlilnnl 2 - - - - - I 1700 1715 1750 1745 1r00 1795 1790 7805 1820 7835 1850 1865 1880 1805 1910 1925 1940 1955 1970 1985 Year Wor Sunapor Nunber