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  王世进,张超,刘文龙,苏广利.利用跨断层资料研究首都圈地区断层活动特征及地震危险性[J].震灾防御技术,2017,12(3):547-556, DOI:10.11899/zzfy20170311.

利用跨断层资料研究首都圈地区断层活动特征及地震危险性
摘要:    本文针对首都圈的跨断层形变资料(1984-2016年),利用11个场地的基线和水准观测资料,计算了断层三维活动量,以此来分析首都圈断层现今的活动特征。同时计算了断层形变协调比序列,分析其与首都圈中强地震的关系。结果表明:首都圈的断层活动有明显的区域特征,受张家口-渤海断裂带影响的西北地区的断层以左旋张性活动为主,而中部和东部断层表现为右旋压性特征。断层协调比结果显示在首都圈及其邻区出现中强地震前后,协调比会出现发散现象,这种现象可以作为今后首都圈及邻近地区中强地震危险性分析的一种依据。
作者单位
王世进 中国地震局第一监测中心, 天津 300180 
张超 中国地震局第一监测中心, 天津 300180 
刘文龙 中国地震局第一监测中心, 天津 300180 
苏广利 中国地震局第一监测中心, 天津 300180 
关  键  词:首都圈地区  跨断层形变资料  断层活动特征  断层活动协调比
DOI:10.11899/zzfy20170311
基金项目:中国地震局监测、预测、科研三结合课题(CEA-JC/3JH-163705)和(CEA-JC/3JH-163703)共同资助
收稿日期:2017-02-15
作者简介:王世进,男,生于1988年。助理工程师。主要从事跨断层测量与断裂活动特征研究。E-mail:275201600@qq.com
通讯作者:
Study on Fault Activity and Seismic Risk in the Capital Region by the Cross-fault Measurement Data
Abstract:      According to fault crossing deformation data of capital circle region, we collected a few decades of data (1984-2016). In order to analyze the present-day activity characteristics of the fault in capital circle region, the three-dimensional activity of the fault is calculated based on these data of 11 sites. The fault motion coordination ration is calculated in order to analyze the relationship with the earthquakes above medium intensity in capital circle region. The results show that:there are obvious regional characteristics of the fault activity in the capital circle region. And it provides a certain method of support for determining the seismic risk of the capital circle region and its adjacent areas in the future and the faults activity is mainly characterized by left lateral and tensional movement. The faults is mainly characterized by right-lateral and compressive movement in central and eastern capital circle region. The result of fault coordination ratio show that divergence will arise before and after the strong earthquakes occurred in the capital circle and its adjacent areas. This phenomenon can be used for the risk analysis of moderately strong earthquakes in the capital circle and adjacent areas.
Keywords:  Capital Region  Fault crossing deformation data  Fault activity characteristics  Fault motion coordination ration
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