A NEW NORM OF MID-SHORT TERM EARTHQUAKE PREDICTION
Chen Xuezhong Ding Jianhai (Center for Analysis and Prediction, SSB, Beijing 100036, China)
A new norm, Cr value which could mirror the seismogenic process entering the mid short term phase, is proposed by the analysis of the seismicities with a certain magnitude level occurring several years prior to strong earthquakes. It could reflect the state around the peak point of the constitutive relation curve. The results of seven earthquake cases with magnitude about 7 show that the Cr value is unusually high before the earthquakes. These strong earthquakes occurred 1～3 years after the maximum value of Cr emerged, and most about 1 year. It will be beneficial to the mid short term earthquake prediction.