摘要
文中发展了由Tinti et a1.(1985)提出的一种判断地震目录不完全性的方法。它由三步组成:余震和震群的剔除,相对完全性的识别以及绝对完全性的计算。假定经过剔除余震和震群后理想化(即没有任何地震从目录中遗漏)的地震目录是一个稳态随机泊松过程,而对于实际的目录,通过拟合检验,将目录分成一组时间区段,每个区段是相对完全的,并具有不同的地震发生率。如果目录中至少有一区段被认为是绝对完全的,那么真实的地震发生率通过统计修补可以得到。该方法被应用到估计华北地区地震发生的概率密度。
In this paper, authors developed a method to identify the incompleteness of a seismic catalog which is provided by Tinti et. al. (1985). It consists of three steps: removal of aftershock and swarm, detection of the relative completeness and evaluation of the absolute completeness. Assuming that the ideal seismic catalog after the aftershock and swarm removel (i.e there isn't any earthquake lost in the catalog) is a set of independent events which are treated as a stationary Possion process; for a practical seismic catalog, it can be divided into a group of time intervals with different seismic occurrence rates by goodness of fittest and the seismic catalog of each interval is treated as relative completeness. If there is at least one interval which is considered as absoulute completeness, the true occurrence rate can be obtained by statistical amendment. The method is applied to estimate the seismic occurrence rate in North China region.
出处
《地震》
CSCD
北大核心
1996年第1期59-67,共9页
Earthquake
基金
国家自然科学基金会
国家地震局科技监测司资助
关键词
地震目录
华北地区
地震概率密度
完全性
Earthquake catalogue, North China region, Stationary Possion pro- cess, Density of seismic occrrence probability
