论文部分内容阅读
文献[1]指出,采一地区,一定时段内发生K次地震的单元面积的频数服从幂函数关系:N(K)=A/(1+K)~C,K=0,1,2,……,K_(max)。式中的C值表征地震在空间分布的集中程度,称为地震空间集中度。笔者认为文献[2]给出的几种C值求解法,在很大程度上决定于初值的选取以及由方程结构本身所决定的收敛速度的快慢。为此,本文提出了一种简单可行的图解法,并制成了相应的量板。而且还利用此法研究了四川几次大震震例,发现在震中周围的C值震前确有一个较为明显的异常过程。文章最后还对C值的意义作了一些推理性解释,认为开展这方面的研究有利于认识地震活动图象随时间的变化过程。
The paper [1] pointed out that the frequency of the unit area of K earthquakes occurring in a certain period of time in a mining area obeys the power function relation: N (K) = A / (1 + K) ~ C, K = 0,1,2, ..., K_ (max). The C value in the equation characterizes the degree of concentration of earthquakes in the spatial distribution, which is called the degree of seismic spatial concentration. The author thinks that several C-value solutions given in [2] are largely determined by the selection of initial values and the speed of convergence determined by the equation structure itself. To this end, this article presents a simple and feasible graphical method, and made the corresponding volume board. In addition, this method was used to study several earthquakes in Sichuan Province. It is found that there is a clear anomalous process before the epicenter C value. Finally, the article also makes some reasoning explanations on the significance of C value. It is concluded that carrying out the research in this aspect is beneficial to understanding the changing process of seismic images over time.