中国大陆及其分区余震序列b值的统计特征分析

Abstract

Abstract: This paper investigated the statistical characteristics of b values of aftershock series in China continent and its subregions during 1966—1999. For the whole China continent, the mean of b values is 0.73±0.19, based on 88 samples of aftershock series. Further the China continent is divided into four sub-regions: Northwestern region (29 samples), Southwestern region (29 samples), North China region (25 samples) and Southeast region (5 samples). We choose the front three regions with more samples as studied ones in this paper, its means of b values ()are 0.62±0.17, 0.86±0.17 and 0.69±0.14 respectively. According to the Z-test on the differences of two means, the difference among the means of b values for the sub-regions is obviously at 90% or more significant level. This paper also investigated the significant difference among the means of b values of aftershock series for shallow earthquakes in China continent (=0.73±0.19), South California of USA (=1.06±0.26) and Japan region (=0.85±0.26).

Key words: Shallow earthquakes, Aftershock series, b value, China continent and sub-regions

CLC Number:

P315.7

FU Zheng-xiang, LU Xiao-jian, SHAO hui-cheng, DIANG Xiang. Analysis on statistical characteristics of b values of aftershock series in China continent and its subregions[J]. EARTHQUAKE, 2008, 28(3): 1-7.

References

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Analysis on statistical characteristics of b values of aftershock series in China continent and its subregions

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