黑龙江省及其邻区地震序列早期特征研究

通过对中国大陆103个地震序列（自1966年以来）显著地震发生后6小时内的资料进行分析表明,中国东部地区地震序列的数量明显低于西部地区,而黑龙江省及其邻区地震序列的数量则更少。地震累积频度拟合函数主要呈指数函数、幂函数分布,其中双震型或多震型序列以指数函数分布为主,主余震型则以幂函数分布为主。 h 值、k 值与地震数量及主余震时间差等无线性关系。显著地震有前震的序列,其地震频度拟合函数、h 值与前震至显著地震的时间间隔有关,当时间间隔大于7小时,地震累积频度拟合函数多呈指数函数分布,h 值<0.5。

Research on early characteristics of earthquake sequences in Heilongjiang Province and its neighbor region

The data collected with in6 hours after significant earthquakes of 103 earthquake sequences （since 1966） have been analyzed systematically,the results show number of earthquake sequence in eastern region is obviously lower than that in western region of China,fewer for Heilongjiang province and its neighbor region.The time distribution function of earthquake frequency is mainly power function and exponential function.Exponential distribution is more for sequences of double earthquakes or cluster. Power function is more for main shock-aftershock sequences.There is not linear correlation among h、k values,number of earthquakes and time gap of main shock-aftershock.The time distribution function and h value is related with time gap between fore-shock and remarkable earthquakes,and the time distribution function is mainly exponential distribution,h value is less than 0.5.