【摘要】 京津冀地区位于华北地震区北部,区内受多组北北东向、北西西向断裂带的影响,构造活动强烈,地震活动水平较高.该区是我国城市密集、人口稠密、经济较发达地带,一旦发生中强地震,会严重影响着区域经济的发展和社会稳定,因此该区的地震活动性愈加值得关注和研究.本文收集了京津冀地区历史破坏性地震和1970年以来中小地震,分析了区域最小完整性震级时间、空间分布特征,基于古登堡-里克特G-R关系的震级-频度分布原理和泊松分布原理,统计分析了京津冀地区的地震活动性参数:a值、b值和V₄值,并定量地分析京津冀地区的地震时、空分布特征,探讨了京津冀地区的地震活动规律性、地震分布特征以及未来地震活动趋势.本文的研究结果可供京津冀地区地震活动性分析和地震危险性分析时参考.更多还原

【Abstract】 Beijing-Tianjin-HeBei region is located in the northern part of the north China seismic zone, where the tectonic and seismicity activities are strong enough, because of the earthquake controlled by a series of the NNE and NWW faults. The region is the dense cities, densely populated; economy is relatively developed area of china. If a moderate-strong earthquake occurs in the area, it will cause a disaster and tremendously influence on the society and economy of the area, so, it is necessary to study and attention the seismicity in this region. In this paper, we collected the historical destructive earthquakes and moderate and small earthquakes since 1970 of the Beijing-Tianjin-HeBei region, analyses the temporal and spatial distribution characteristics of the minimum magnitude of completeness. Based on the magnitude-frequency distribution principle of the G-R relationship and Poisson distribution principle, this paper make a statistical analysis on the seismicity parameters a value, b value and the V₄ value of research region, quantitative analyses the temporal and spatial distribution characteristics of earthquake in the Beijing-Tianjin-HeBei region. This paper discusses the regularity, distribution characteristics of the earthquake and future trend of seismic activity in the Beijing-Tianjin-HeBei region. The research results of this article can be used as a reference for the seismic activity and seismic risk analysis in the Beijing-Tianjin-HeBei region.更多还原