什么是地震活动度?有位外系统的朋友来问我。我对此知之甚少,为了回答这个问题,我查阅了一些资料,形成一点看法。首先说明,地震活动度是对地震群体而言的,而不是对单个地震而言的。因为单个地震,可以用地震震级、发震时间和它的空间位置确定。为了描述地震的群体特征,最直接的办法是,利用上述描述单个地震的时空强参数,画出它们的空间分布图或时间分布图,从而 What is the degree of seismic activity? There is a system of friends to ask me. I know very little about this, in order to answer this question, I read some information to form a point of view. First, it shows that the degree of seismic activity is for earthquake groups, not for single earthquakes. Because of a single earthquake, it can be determined by the magnitude of the earthquake, the time of occurrence of the earthquake and its spatial location. In order to describe the population characteristics of the earthquake, the most direct way is to use the above-mentioned space-time strength parameters of a single earthquake to draw their spatial or temporal distribution maps