Reports, Geological Survey of Japan Back Number

1991	1992		1994	1995		1997			2000
1981			1984	1985	1986	1987	1988	1989
1971	1972	1973	1974	1975	1976	1977	1978		1980
1961	1962	1963	1964	1965	1966	1967	1968	1969	1970
1951	1952	1953	1954	1955	1956	1957	1958		1960
1941	1942	1943	1944				1948	1949	1950
	1932	1933	1934	1935	1936	1937		1939	1940
1921	1922	1923	1924	1925	1926	1927	1928	1929	1930
1911	1912	1913	1914	1915	1916	1917	1918	1919	1920
						1907	1908	1909	1910

※Now, before 1937, it is only Japanese