中国大陆成组强震与强震调制比分析  

The strong earthquake group in China′s continent and the analysis of the strong earthquake modulation rate

作　　者：黎凯武[1] 

机构地区：[1]中国地震局分析预报中心,北京100036

出　　处：《地震》2000年第z1期44-50,共7页Earthquake

基　　金：地震科学联合基金项目!(1 990 35)

摘　　要：阐述了中国大陆强震成组活动中反映地球自转和引潮力对强震调制作用的参量——强震调制比 ,及其在地震预报中的意义。强震成组活动是中国大陆地震高潮期的主要方式和主体 ,某些强震组强震的发生常常受地球自转和引潮力的调制 ,调制的程度可用一个称之为强震调制比的参数 K来表示 ,Kr、Kt分别表示地球自转和日月引潮力的强震调制比。Kr=Nr/N总,Kt=Nt/N总 ,N总 、Nr、Nt分别为一组地震中 MS≥ 6.0的地震总次数、地球自转触发的地震次数和引潮力触发的地震次数。强震调制比是地震组的一个特征参数 ,它除反映该组地震受地球自转和引潮力调制的强弱外 ,还反映孕育该组地震的地质构造和地震活动时间的某些特性 ,因此对地震预报具有一定的实用价值。A parameter, the strong earthquake modulation rate, which rep resents t he modulation effect of the rotation of the earth and the tide force to the stro ng earthquakes during the strong earthquake activity in group in China′s contin e nt, and its significance for earthquake prediction are studied in this paper. Th e strong earthquake activity is the basic pattern and feature of the seismically active period. The occurrences of some strong earthquake groups were modulated by the rotation of the earth and the tide force. The degree of modulation is rep resented by a parameter K, where kr and kt are the strong earthq uake modulation rate of the rotation of the earth and the tide force respectively. Kr=Nr/N total, Rt=Nt/Ntotal, Ntotal, Nr, Nt are th e total number of the earthquake s in a stron g earthquake group, the number of the earthquakes modulated by the rotation of t he earth and the tide force respectively. The strong earthquake modulation rate is a characteristic parameter. Because it represents the degree of the modulatio n resulted from the rotation of the earth and the tide force as well as some fea ture of the seismogenic structure and the timing of seismicity, it is of some pr actical value to earthquake prediction.

关 键 词：地震组 地球自转 引潮力 强震调制比 

分 类 号：P315[天文地球—地震学]