Abstract: This paper discusses the rhythmic characteristics of high seismic activity by using the China Mainland data on M≥7 earthquakes. It is pointed that there is a developmental process, high tide of strong earthquak activity follows quiet and increase of the strong seismic activity (called quiet transition and strong earthquak episode respectively). The continued time, the frequency and energy of the strong earthquakes of each episode in the seismic cycle are discussed in detail in this paper. In addition, region of distribution of strong earthquakes in each cycle is analysed as well as forming of major activity regions in each high tide of strong seismic activity. These results can be used to study marks of the beginning and end of the high tide of strong earthquakes and to determine the major activity regions of the coming high tide of strong earthquakes to a certain extent. The relation between the strong earthquake episodes in the China continent and the deep earthquakes in the Northeastern part of China is analysed as well.

Key words: China Mainland, Earthquake, Rhythmic

摘要： 本文应用1895年以来我国大陆地区7级和大于7级的强震资料,讨论了我国大陆强震活动的轮回特性,指出了我国大陆地区强震高潮的到来有一个发展过程,即经历强震活动的平静、增强及出现强震高潮三个幕。文中讨论了各幕的持续时间及其强震活动的频度和能量分布,同时还分析了各轮回中强震的地区分布,探讨了每个强震高潮的主体活动区的形成特点。这些结果可为研究我国大陆强震高潮到来和结束的标志及判断未来强震高潮的主体活动地区等强震预测问题提供线索。此外,本文还分析了我国大陆强震高潮与东北深震的相关关系等问题。

关键词: 中国大陆, 地震, 韵律性