Characteristic study on the significant earthquake before strong earthquake based on CH method in Xinjiang

Authors used the CH method to study the significant earthquakes before 21 strong earthquakes with M_S6.0 in Xinjiang.The study show that,of 21 strong earthquakes,there are 10 strong earthquakes,before which occurred more than 2 significant earthquakes,and 7 strong earthquakes meet the CH criterion,accounting for 70% of the earthquakes,whose number of significant earthquakes meet the CH method.Of the 7 earthquakes,the main earthquakes occurred 25 days later after its significant earthquakes,excepting the Jinghe M6.0 earthquakes occurred 63 days later after its significant earthquakes.The result shows that CH method can be used for the short-term earthquake prediction before strong earthquakes in Xinjiang.