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利用全国地震目录数据库,系统梳理建国以来中国西部地区5.0级以上地震信息;利用信息扩散理论,从年最大震级和各级地震灾害年频次两个方面对西部12省、市、自治区的地震灾害进行风险评估。在此基础上,将风险估计离散值进行曲线拟合,系统评价中国西部地震最为多发5省区的地震风险分布趋势及差异,定量揭示中国西部地区地震风险,为西部地区地震防灾减灾提供技术支持和决策建议。
Using the National Earthquake Catalog Database, we systematically sorted out the magnitude 5.0 earthquakes in western China since the founding of the People's Republic of China. Based on the information diffusion theory, the earthquake disasters in 12 provinces, municipalities and autonomous regions in western China were carried out from two aspects of the maximum annual magnitude and annual frequency of earthquake disasters at all levels Risk assessment. On the basis of this, curve fitting of discrete values of risk estimation is carried out to systematically evaluate the trend and difference of seismic risk distribution in the five provinces with the most frequent earthquakes in western China, quantitatively reveal the seismic risk in western China and provide technology for earthquake disaster prevention and mitigation in western China Support and decision-making advice.