日本における受震頻度分布について
1974 年 27 巻 3 号 p. 215-224
詳細
1974 年 27 巻 3 号 p. 215-224
The map of expected maximum acceleration in Japan was published in 1951 by Kawasumi based on 342 data during 1350 years. Muramatu computed in 1966 the expected maximum veloctiy using 106 data during 97 years. These two, however, are not so well coincident with each other. The discrepancy may be partly due to the difference in time duration of data. The older the data, the less precise the quality in number and homogeneity of distribution.
In this paper the similar study on expected intensity is made based on the homogeneous and high quality data by JMA during 1926 and 1965. The average intensities at 552 mesh points are calulated. The result for whole 40 years (L) has a good correlation with that for every 10 years (A, B, C, D).
The correlation between the present result and those based on longer period data is also found, although the correlation is not so high as the case of L, A, B, C and D. These results indicate that the expected intensity based on the short time data is fairly useful, if the data are homogeneous and of high quality.
