摘要
本文综合了哈斯克尔(N.A.Haskell)的有限长度的运动断层模型和安艺敬一(K.Aki)的所谓ω^(2)模型(他的模型用了一个指数衰减函数作为位错速度的自相关函数),略去了一些次要的因素和项,考虑了与烈度的联系,建立了一个计算烈度分布的模型。用此模型和震源机制工作给出的震源参数,计算了四个典型地震的理论烈度分布。同实际观测的烈度分布比较,两者基本一致。说明我们建立的模型,不仅可以解释许多实际的烈度分布(而有些是从地质构造角度无法解释的),而且可以用于计算大面积的烈度分布。
In this paper,the authors combine the Haskell’s model which is a moving fault of finite length and the Aki’s so-called ω^(2) model which is constructed by fitting an exponentially decaying function to the autocorrelation function of the dislocation velocity.Neglecting some secondary factors and terms and at the sametime considering its relation with the earthquake intensity,the authors have proposed a model for computing the distribution of earthquake intensity.Using this model and the seismic source parameters obtained by source mechanism studies,the authors computed the theoretical distributions of earthquake intensity for four typical earthquakes.Com-parison of the theoretical with the observed distributions,the agreement is close.It shows that this model not only can explain many earthquake intensity distributions in practice,some of which are hard to explain from the point of view of geological structures,but also may be used for computing the theoretical earthquake intensity distribution for a very large area.
作者
陈培善
严寿民
CHEN PEI-SHAN;YEN SHOU-MIN(Institute of Geophysics,Academia Sinica)
出处
《地球物理学报》
1975年第1期11-25,共15页
Chinese Journal of Geophysics
