Wikipedia has some dates that clarify: https://en.m.wikipedia.org/wiki/La_Ni%C3%B1a https://en.m.wikipedia.org/wiki/La_Ni%C3%B1a Difference between gaps and d

Wikipedia has some dates that clarify: https://en.m.wikipedia.org/wiki/La_Ni%C3%B1a https://en.m.wikipedia.org/wiki/La_Ni%C3%B1a Difference between gaps and duration.