El Niño (Sunspot Number) | La Niña (Sunspot Number) | |||||
(El Niño Index) | (La Niña Index) | |||||
Weak (1) | Moderate (2) | Strong (3) | Very Strong (4) | Weak (1) | Moderate (2) | Strong (3) |
1952-53 (0.05) 1953-54 (0.05) 1958-59 (0.34) 1969-70 (0.16) 1976-77 (0) 1977-78 (0.03) 1979-80 (0.25) 2004-05 (0.28) 2006-07 (0.05) 2014-15 (0.18) | 1951-52 (0.05) 1963-64 (0.04) 1968-69 (0.22) 1986-87 (0.04) 1994-95 (0.11) 2002-03 (0.29) 2009-10 (0)
| 1957-58 (0.4) 1965-66 (0.02) 1972-73 (0.15) 1987-88 (0.05) 1991-92 (0.38)
| 1982-83 (0.38) 1997-98 (0.16) 2015-16 (0.19)
| 1954-55 (0) 1964-65 (0.06) 1971-72 (0.21) 1974-75 (0.03) 1983-84 (0.28) 1984-85 (0.22) 2000-01 (0.27) 2005-06 (0.1) 2008-09 (0.02) 2016-17 (0.04) 2017-18 (0.05) | 1955-56 (0.05) 1970-71 (0.22) 1995-96 (0.05) 2011-12 (0.05)
| 1973-74 (0.09) 1975-76 (0) 1988-89 (0.05) 1998-99 (0.1) 1999-00 (0.11) 2007-08 (0.05) 2010-11 (0.02) |