震中分布 meaning in Chinese

epicenter distribution

At first the authors explain the structural environment of earthquake in china , by giving an example of the institutes of epicenter of earthquake in china , from january , 1989 to december , 1998 , it shows the recent activity characteritic and districts division of earthquake in china . secondly they give a prediction by explaining stages about the earthquake activity in the past 100 years in china
首先对中国地震构造环境作了分析，并以1989年1月至1998年12月中国地震震中分布为例说明中国近期地震活动特征且对中国近期进行地震分区.最后，试图通过对中国近100年地震活动分期分析，作出相应的中长期预测