| Statistical Analysis on Depth Distribution Model of Earthquake Hypocenters |
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| 作者姓名： | Xu Guangyin Gao Mengtan Yu Yanxiang Wang Jian |
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| 摘 要： | In order to improve reliability of probabilistic seismic hazard analysis, shallow earthquake (depth <70 km) data, recorded with orientation precision grades 1 and 2 by modern instrument and containing depth information after 1970, are selected as statistical samples, meanwhile, North China seismic region, Central China seismic region, South China seismic region, Xinjiang seismic region and Qinghai-Xizang Plateau seismic region are chosen as statistical units to study the depth distribution characteristics of shallow earthquakes. Considering the differences of depth distribution characteristics of earthquakes with different magnitudes, the following magnitude intervals are adopted to analyze earthquakes with different magnitude scales, respectively: M S=2.0～2.9, M S=3.0～3.9, M S=4.0～4.9, M S=5.0～5.9 and M S=6.0～6.9. The results show that hypocenter depths are normally distributed by and large around the mean depth of the corresponding seismic region. The probabilistic distribution curves of earthquake depth in West China are wider than those in East China. The probabilistic distribution deviation, σ, of West China is greater than those of East China, that is, earthquakes in West China have a wider range in terms of depth. There is also a tendency that the absolute value of mean hypocenter depth increases with the magnitude by and large.
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| 关 键 词： | 浅层地震 震源深度 地震带 分布模型 统计分析 |
Statistical Analysis on Depth Distribution Model of Earthquake Hypocenters |
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| Xu Guangyin,Gao Mengtan,Yu Yanxiang,Wang Jian.Statistical Analysis on Depth Distribution Model of Earthquake Hypocenters[J].Earthquake Research in China,2002,16(2):113-119. |
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| Authors: | Xu Guangyin Gao Mengtan Yu Yanxiang and Wang Jian |
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| Institution: | Institute of Geophysics, CSB, Beijing 100081, China;Institute of Geophysics, CSB, Beijing 100081, China;Institute of Geophysics, CSB, Beijing 100081, China;Institute of Geophysics, CSB, Beijing 100081, China |
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| Abstract: | |
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| Keywords: | Shallow earthquake Hypocenter depth Distribution model Seismic region Magnitude interval |
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