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Current solar activity, sunspot index and sunspot numbers, Observation of sunspots and solar activity forecast, prediction of the solar activity. Sunspots in the northern hemisphere and sunspots of the southern hemisphere. sunspot numbers since 1700, daily sunspot numbers since 1818. solar activity diagram, sun cycle diagrams, strong sun cycle, weak sun cycle. historical solar activity, old solar activity, new definition of solar activity. Galileo Galilei and Wolf. forecast of the next sun cycle, forecast of the next solar cycle, comparing the sun cycles. 22 year Hale cycle, 11 year Schwabe cycle, magnetic polarity, 2300 - 2400 years Hallstatt cycle, 55 years Yoshimura, 85 years Gleißberg cycle, 180 - 210 years Seuss cycle, 180 - 210 years de-Vries cycle, 1470 years cycle of Bond- and Dansgaard-Oeschger events, intensity of the solar wind, solar activity of suns backside. Maunder Minimum, Dalton Minimum, Modern Maximum, Oort Minimum, Mittelalterliches Maximum, Wolf Minimum, Spoerer Minimum. Flares and aurora, space weather, Observatory, solar telescope, SDO, Satellites, brightness of the sun, geomagnetical storms. The Zeeman Effect describes the solar magnetic field as the driver of the sunspots. Royal Observatory of Belgium by the World Data Center.

Annual summery of the solar activity

Archive

Diagram for 2009

Sunspot index for 2009

2008
2010


The diagram shows the sunspot index of the selected year. The red line displays the sunspot index for the northern hemisphere, the blue line the index for the southern hemisphere of the sun. The green line represents the sunspot index for the whole visible solar disc.


Note: The sunspot index cannot discribe the solar activity on the far side of the sun.



Source: WDC-SILSO, Royal Observatory of Belgium, Brussels.

 

Sunspot archive:

2010   2011   2012   2013   2014   
2015   2016   2017   2018   

2000   2001   2002   2003   2004   
2005   2006   2007   2008   2009   

1990   1991   1992   1993   1994   
1995   1996   1997   1998   1999   

1980   1981   1982   1983   1984   
1985   1986   1987   1988   1989   

1970   1971   1972   1973   1974   
1975   1976   1977   1978   1979   

1960   1961   1962   1963   1964   
1965   1966   1967   1968   1969   

1950   1951   1952   1953   1954   
1955   1956   1957   1958   1959   

1940   1941   1942   1943   1944   
1945   1946   1947   1948   1949   

1930   1931   1932   1933   1934   
1935   1936   1937   1938   1939   

1920   1921   1922   1923   1924   
1925   1926   1927   1928   1929   

1910   1911   1912   1913   1914   
1915   1916   1917   1918   1919   

1900   1901   1902   1903   1904   
1905   1906   1907   1908   1909   

1890   1891   1892   1893   1894   
1895   1896   1897   1898   1899   

1880   1881   1882   1883   1884   
1885   1886   1887   1888   1889   

1870   1871   1872   1873   1874   
1875   1876   1877   1878   1879   

1860   1861   1862   1863   1864   
1865   1866   1867   1868   1869   

1850   1851   1852   1853   1854   
1855   1856   1857   1858   1859   

1840   1841   1842   1843   1844   
1845   1846   1847   1848   1849   

1830   1831   1832   1833   1834   
1835   1836   1837   1838   1839   

1820   1821   1822   1823   1824   
1825   1826   1827   1828   1829   

1818   1819