Author(s)：Youjin Su1, Hui Hu
This article introduces application of the expanding commensurability in earthquake prediction. The results show that most of the world’s major earthquake occurred at their commensurable points of time axis. An EQ 7.0 occurred in Lushan of China on 2013-04-20 and an EQ 8.2 occurred in Iquique of northern Chile on 2014-04-01 all occurred at their commensurable points of time axis. This once again proves that the commensurability provides an important scientific basis for the prediction of major earthquakes, which will occur in the area in future.
Earthquake (EQ) research, especially EQ prediction, is accepted as a worldwide difficult scientific problem .People have made arduous and unremitting efforts for searching for the effective methods of EQ prediction for a very long time. However, most of the basic concepts and systems of methods do not break away from the system of quantitative analysis of the inertial system so that the problem of prediction of serious natural disasters like EQs has not been solved. A Chinese famous geophysicist, Weng Wenbo (1912-1994) studies the Titius-Bode law  and firstly pointed out that the occurrence time of EQ has the commensurability and applied the principle of the commensurability which was firstly proposed in astronomy to the prediction of major natural disasters such as earthquakes, droughts and water-loggings, etc., thereby developed it into the theory of prediction which have been widely used in the prediction of disasters -. Based on this theory, the occurrence of a few EQs, droughts and water-loggings, and other natural disasters were successfully predicted.
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