The catalogs of earthquakes [1], edited by Shebalin-Leydekkera selected 19 seismic zones. It was interesting to check the methods of mathematical statistics availability of the statistical relationship between these zones. Mathematical Statistics reveals the degree of likelihood of certain hypotheses concerning some events.
Plausibility is not proof, but says only that there are sufficient grounds to reject has been suggested. Statistical techniques can help you find areas of research and to point out the most important factors.