Abstract
The Ishimoto-Iida's statistical formula is represented as follows:NAm=k, where, A is a traced maximum amplitude, N is an annual average frequency of small shocks with A, and m or k is a constant at that place. The index m shows some different values in accordance with the class number classifying the maximum amplitude.In applying the Sturges' Formula to its classification, as the result of testing these values by the stochastical method, we have reached the conclusions that we need not consider both values in two directions of horizontal vibration, and moreover, the geophysical meaning of m is not lost, for the value m=1.9 in population is not rejected at the significance level of 5% or 1%.In recognition of this fact, we shall be able to propose the classifying method based on the Sturges' Formula, i. e.n=1+logN/log2, where, N is the total number of data, and n is the suitable class number.Let us now apply the above method to the observational data obtained at Abuyama during 1949-1953. Thus we shall gain the results that the homogeneity of the m value and m=1.9 in population are not rejected (1%), regardless of the magnitude, or the extent of the observed domain, or the term of each year of observed earthquakes.
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Schedule a callMore From: Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
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