华北几次大震前弱震分布参数R(t)的异常变化  

ANOMALOUS VARIATION OF PARAMETER R(t) OF SMALL EARTHQUAKE DISTRIBUTION PRIOR TO SEVERAL LARGE EARTHQUAKES IN NORTH CHINA

作　　者：刘西林[1] 华爱军[1] 

机构地区：[1]山东省地震局,工程师济南250021

出　　处：《地震学刊》1994年第3期17-20,26,共5页Journal of Seismology

摘　　要：本文详细研究了1974年以来华北地区9次Ms≥5.0级大震前,小震时空分布参数R(t)的变化特征.结果表明:华北地区9次Ms≥5.0级大震前小震时空分布参数R(t)值均出现了先上升,然后下降直至主震发生的异常图象。根据R(t)值异常可能对未来发生的大震作出一定程度的预报.文中对R(t)值异常变化的机制进行了初步讨论.The change characteristic of space - time distribution parameter R(t) of small earthquakes prior to nine large earthquakes (Ms≥5. 0) is studied in detail in North China since 1974. The results show that there was anomalous pattern with the parameter R(t) increased at first, and then decreased untill the main earthquake ocurred. It is possible that earthquake is predicted to a certain extent, finally, the mechanism of anomalous variation of R(t) is preliminarily discussed.

关 键 词：时空分布参数 地震预报 弱震 异常机制 

分 类 号：P315.75[天文地球—地震学]