| Influence of statistical time range on estimating seismicity parameters |
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| 作者姓名： | 黄玮琼 吴宣 |
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| 作者单位： | HUANG Wei-qiong WU Xuan Institute of Geophysics，China Seismological Bureau，Beijing 100081，China |
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| 基金项目： | Chinese Joint Seismological Science Foundation (100110). |
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| 摘 要： | Introduction At present, the current probabilistic method of seismic hazard analysis in the world is gener-ally adopted in seismic safety evaluation (Cornell, 1968). It supposed that earthquake occurrence conforms to the segmented Poisson distribution model in time and space and the proportional rela-tion among earthquakes of various magnitudes obeys the cut-exponential distribution law in a sta-tistical area in compiling Seismic Intensity Zoning Map in China (1990) owing to the temporal- sp…
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| 收稿时间： | 21 March 2001 |
| 修稿时间： | 21 September 2001 |
Influence of statistical time range on estimating seismicity parameters |
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| HUANG Wei-qiong,WU Xuan.Influence of statistical time range on estimating seismicity parameters[J].Acta Seismologica Sinica(English Edition),2001,14(6):626-633. |
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| Authors: | HUANG Wei-qiong WU Xuan |
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| Institution: | Institute of Geophysics, China Seismological Bureau, |
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| Abstract: | The influence of non-uniqueness in selecting statistical time ranges on seismicity parameters of b value and annual mean occurrence rate n4 is widely analyzed and studied. The studied result states that the influence of statistical time range on the b value is generally smaller than on the annual mean rate. Owing to the exponentially functional relation between the annual mean rate and b value, the variation of b value by varying statistical time range brings about decrease or increase in the annual mean rates of each magnitude interval with power progression law. These results will exert a synthetic effect on seismic safety evaluation results in various regions in our country. |
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| Keywords: | statistical time range b value annual mean occurrence rate uncertainty |
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