In this paper, we have researched the space-time distribution characteristics of small earthquakes sequence before and after large earthquakes from information amount, and defined lack information amount IQ value to reflect the distribution which hides the anomalous information of large earthquake in future. As some examples of the Haicheng, Tangshan, Helingeer and Manasi earthquakes, we have analysed the dynamic variations of IQ values before and after these strong earthquakes.The results show that the IQ value had appeared notable low value phenomena before the strong earthquakes took place. We believed that IQ value can quantitatively describe the information of various phenomena patterns of the seismic space-time distribution before large earthquake. It is a good way to monitor and forecast large earthquake.
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朱令人,周仕勇,龚宇清,王海涛,白超英.信息量在地震活动研究中的应用[J].地震工程学报,1991,13(3):15-20. Zu lingren, Zhou Shiyong, Gong Yuqing. THE APPLICATION OF INFORMATION AMOUNT IN THE SEISMIC ACTIVITY STUDY[J]. China Earthquake Engineering Journal,1991,13(3):15-20.