摘要
通过对鄂东襄樊-广济断裂黄州段的地质构造、第四纪活动性、地震活动和现今地壳变形的分析,综合判定该段断裂的活动性和构造特征。该断裂是中国东部地区典型的弱-中等活动断裂。采用地震构造类比法和矩震级经验关系,综合评估了断裂的未来可能最大发震震级为6.0级;利用历史和现今地震活动资料,建立了按500a归算的震级-频度关系,采用泊松概率模型,计算得到襄樊-广济断裂黄州段未来50~200a地震平均复发间隔和发震概率等定量参数。该成果可为区域地震危险分析及工程抗震设防提供参考。
Based on the analysis of geological structure,Quaternary activity,seismic activity and recent crustal deformation in Huangzhou section of Xiangfan-Guangji fault in the eastern Hubei,the activity and tectonic characteristics of the fault were determined synthetically.The result shows this fault is a typical weak-medium active fault in the eastern part of China.Then the seismic structure analogy and moment magnitude empirical relationship were adopted to evaluate the possible maximum seismicity of the fault,which is M s6.0.Historical and modern seismic activity data were used to establish a magnitude-frequency relationship model by 500 a.Finally the Poisson probability model was utilized and quantitative parameters such as recurrence period and occurrence probability of Huangzhou section of Xiangfan-Guangji fault in the coming 50 to 200 a were calculated.This result can provide a reference for regional seismic hazard analysis and engineering seismic fortification.
作者
胡庆
余松
杨钢
郑水明
蔡永建
HU Qing;YU Song;YANG Gang;ZHENG Shui-ming;CAI Yong-jian(Hubei Key Laboratory of Earthquake Early Warning,Institute of Seismology,China Earthquake Administartion,Wuhan 430071,China;Wuhan Institute of Earthquake Engineering,Wuhan 430071,China)
出处
《科学技术与工程》
北大核心
2019年第16期26-32,共7页
Science Technology and Engineering
基金
地震科技星火计划(XH15027)资助
关键词
襄樊-广济断裂黄州段
地震危险性
最大震级
复发周期
发震概率
Huangzhou section of Xiangfan-Guangji fault
seismic risk
maximum seismicity
recurrence period
occurrence probability
