震源断层的长度与错动幅度之间关系的讨论

震源断层的长度和错动幅度是震源参数中两个重要的量,寻找它们在震前的指标对地震预报具有要重的意义。这两个量的比值代表了地下断层错动的协调性,因此有助于了解震源环境。本文通过对中国、日本、美国三地区的大震断层资料的处理,得到了震源断层的长度与错动幅度之间近似地存在着线性关系的结论,震源断层的错动幅度是其长度的10~(-5)数量级。另外,本文根据地震过程中震源断层的长度与错动幅度之间的协调关系,讨论了1976年唐山地震前的断层蠕滑问题,以及郯庐断裂带上几百公里的水平错距是否可能的问题。

DISCUSSION ON THE RELATIONSHIP BETWEEN FOCAI FAULT LENGTH AND FACAL FAULT DISLOCATION

F.F.L.and.F.F.D.^* are two important quantities of the earthquake source parameters.It is important for earthquake prediction to find indicated scales of them before earthquake occurs.The special value between F.F.L.and F.F.D.represents the harmonic property in dis ocation procedure of fault at depth.This property is helpful for us to understand source circumstance.In this paper,we have collected the fault data of great earthquakes occurred in regions of China,Japan and the United States,then analysed and processed these data,and obtained approximate linear relationship between F.F.L.and F.F.D.,the former of which is 10^-5 order of magnitude larger than the latter.In addition to the above-mentioned,depending on the harmonic relationship between F.F.L.and F.F.D.in the earthquake procedure,we discuss the problem whether the earthquake fault before the 1976 Tangshan earthquake creeped or not,and whether the slippage in the Tanlu fault can do or not for handred kilometers of horizontal offset.