C l o s e

List of data modifications of Greenwich sunspot data (1874-1976)
made in the Heliophysical Observatory, Debrecen, Hungary

The columns of the original data are left, the new data are right, and the changes are in red.
For further information on checking of GPR data see the List of tests


1874 1875 1876 1877 1878 1879 1880 1881
1882 1883 1884 1885 1886 1887 1888 1889 1890 1891
1892 1893 1894 1895 1896 1897 1898 1899 1900 1901
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911
1912 1913 1914 1915 1916 1917 1918 1919 1920 1921
1922 1923 1924 1925 1926 1927 1928 1929 1930 1931
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941
1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
1952 1953 1954 1955 1956 1957 1958 1959 1960 1961
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971
1972 1973 1974 1975 1976

Lists in the FTP