Russian Academician Postulates a Seismicity-Climate Connection
Molchanov, O. 2010. About climate-seismicity coupling from correlation analysis. Natural Hazards and Earth System Sciences 10: 299-304.
Based on their analysis, it was determined, first of all, that (1) the "climate indices show expected ENSO variation," and "amazingly," as Molchanov describes it, that (2) the earthquake indices demonstrate "similar quasi-ENSO variations." So the next questions were obviously: (1) which is the action? ... and (2) which is the reaction? From a number of other factors considered by the Russian researcher, he concludes that it is "more probable" that earthquake activity is "forcing the ENSO variation in the climate" than vice versa.
In concluding his paper, Molchanov states that "trends in the climate and seismic variations are similar to each other," and that "it is rather probable that the climate ENSO effect is at least partially induced by seismicity with a time lag of about 1.5 years," leaving it up to others to further study and debate the issue.