华北平原地震带活动性参数计算  

Statistical Calculation of Seismic Activity Parametersin the North China Plain

作　　者：茅远哲 刘德强 MAO Yuanzhe;LIU Deqiang(Hebei Earthquake Agency,Hebei Shijiazhuang 050021,China)

机构地区：[1]河北省地震局,河北石家庄050021

出　　处：《四川地震》2024年第4期32-35,共4页Earthquake Research in Sichuan

基　　金：面向区划图编制的河北潜源划分和地震活动性参数研究(DZ2023120800007)。

摘　　要：地震带活动性参数是地震危险性分析的核心指标之一,地震统计样本需要以足够时长和时效的资料为基础。为填补地震资料不足造成的影响,本文以华北平原地震带活动性参数为研究对象,在《中国地震动参数区划图》(GB 18306—2015)地震目录基础上,补充华北平原地震带2011年1月1日至2023年12月31日共13年M≥4.0地震的资料,重新计算了地震带活动性参数。结合统计基础和实际数据分析,计算出华北平原地震带b值为0.84,v4结果为3.91。该结果低于第五代区划图确定的b值,体现了后续地震对地震活动特征和活动水平的影响,可为工程地震危险性分析计算和相关业务提供参考依据。Seismic activity is one of the key parameters for seismic risk analysis,seismic statistical samples need to be based on sufficient duration and time data.In order to supplement the calculation impact caused by insufficient seismic data,this paper took the activity parameters of the seismic zone in the North China Plain as the research ob-ject.We based on the earthquake catalog of the China Ground Motion Parameter Zoning Map(GB 18306—2015).The activity parameters of the seismic belt in the North China Plain were recalculated by supplementing the data of M≥4.0 earthquakes from January 1,2011 to December 31,2023.Based on the statistical basis and the analysis of actual data,the result of calculating the b value of the seismic zone is 0.84 whereas the result of v4 is 3.91.The result is lower than the b value determined by the“five-generation map”,which reflects the influence of subsequent earthquakes on the characteristics and level of seismic activity.The study could provide a reference for engineering seismic risk analysis and calculation and related business.

关 键 词：华北平原地震带 B值 V4 地震活动性参数 地震危险性分析 

分 类 号：P315[天文地球—地震学]