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Methods for Estimating Mean Annual Rate of Earthquakes in Moderate and Low Seismicity Regions

Methods for Estimating Mean Annual Rate of Earthquakes in Moderate and Low Seismicity Regions
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摘要 Two kinds of methods for determining seismic parameters are presented, that is, the potential seismic source zoning method and grid-spatially smoothing method. The Gaussian smoothing method and the modified Gaussian smoothing method are described in detail, and a comprehensive analysis of the advantages and disadvantages of these methods is made. Then, we take centrai China as the study region, and use the Gaussian smoothing method and potential seismic source zoning method to build seismic models to calculate the mean annual seismic rate. Seismic hazard is calculated using the probabilistic seismic hazard analysis method to construct the ground motion acceleration zoning maps. The differences between the maps and these models are discussed and the causes are investigated. The results show that the spatial smoothing method is suitable for estimating the seismic hazard over the moderate and low seismicity regions or the hazard caused by background seismicity; while the potential seismic source zoning method is suitable for estimating the seismic hazard in well-defined seismotectonics. Combining the spatial smoothing method and the potential seismic source zoning method with an integrated account of the seismicity and known seismotectonics is a feasible approach to estimate the seismic hazard in moderate and low seismicity regions. Two kinds of methods for determining seismic parameters are presented,that is,the potential seismic source zoning method and grid-spatially smoothing method. The Gaussian smoothing method and the modified Gaussian smoothing method are described in detail, and a comprehensive analysis of the advantages and disadvantages of these methods is made. Then,we take central China as the study region,and use the Gaussian smoothing method and potential seismic source zoning method to build seismic models to calculate the mean annual seismic rate. Seismic hazard is calculated using the probabilistic seismic hazard analysis method to construct the ground motion acceleration zoning maps. The differences between the maps and these models are discussed and the causes are investigated. The results show that the spatial smoothing method is suitable for estimating the seismic hazard over the moderate and low seismicity regions or the hazard caused by background seismicity; while the potential seismic source zoning method is suitable for estimating the seismic hazard in well-defined seismotectonics. Combining the spatial smoothing method and the potential seismic source zoning method with an integrated account of the seismicity and known seismotectonics is a feasible approach to estimate the seismic hazard in moderate and low seismicity regions.
作者 Peng Yanju Zhang Lifang Lv Yuejun Xie Zhuojuan
机构地区 Institute of Crustal Dynamics
出处 《Earthquake Research in China》 2012年第3期335-347,共13页 中国地震研究（英文版）
基金 sponsored by the National Key Technology R&D Program,China (2006BAC13B01)
关键词 Moderate and low seismicity regions Annual seismic activity rate Grid-spatially smoothing method Potential seismic source zoning method 地震区 概率地震危险性分析 平均 空间平滑法 潜在震源区 危险性分区 估算 平滑方法
分类号 P315.2 [天文地球—地震学] P315.08 [天文地球—地震学]
  • 相关文献

参考文献17

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二级参考文献26

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Earthquake Research in China
2012年 第3期

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