THE ACTIVE CHARACTERISTICS OF FAULTS AROUND HANDAN CITY

doi:10.3969/j.issn.0253-4967.2012.01.010

Abstract

Abstract:

Activity of fault zones can often lead to earthquake. On the contrary, earthquake can also help people to analyze and forecast the characteristics of faults. To know more about the characteristics of active faults around Handan, and serve better for the urban construction and planning, a joint inversion method, which is based on earthquake data from local seismic network in Handan, was employed in this paper to get the distribution characteristic of earthquake parameters in space and time on the main faults around Handan and determine the characteristics of P-wave velocity structure in the crustal medium. Integrated analysis shows: The small earthquake activities around Handan are caused mainly by Cixian Fault and the Linzhou-Wu'an Fault; There is almost no activity on the southern end of Taihang Mountains piedmont fault zone (Cixian-Wu'an section); Earthquake activities are concentrated in a range of 6～10km; Fault activity gradually evolved from the faulting of the two faults simultaneously at the beginning to that the Cixian Fault was dominant.

Key words: fault zone, earthquake distribution, Handan City, velocity inversion

摘要：

断裂活动和地震活动具有互为因果的关系,而不同于一般做法,文中用地震的活动性来分析断裂带的活动特征。为了解邯郸市周边存在的断裂带的活动特征,基于邯郸市附近地震台网监测的地震数据,利用地震纵波速度和震源位置联合反演方法,得到了邯郸市周边主要断裂带上地震波速度及震中在空间和时间上的分布特征,确定了地下壳质的纵波速度结构特征。综合分析表明:邯郸市周边小震的活动主要由磁县断裂和林州-武安断裂引起,太行山山前断裂带南端(邯郸-磁县段)几乎没有活动;地震活动集中在6～10km的范围内;活动时间特征是,从开始的2条断裂带同时活动逐渐演变为以磁县断裂活动为主。

关键词: 断裂带, 地震分布, 邯郸市, 速度反演

CLC Number:

P315.2

ZHOU Jun-jie, SONG Hong-li, LIU Hai-xin, ZHANG Hong-fen, ZHOU Long-quan. THE ACTIVE CHARACTERISTICS OF FAULTS AROUND HANDAN CITY[J]. SEISMOLOGY AND GEOLOGY, 2012, 34(1): 100-109.

周俊杰, 宋宏利, 刘海新, 张红芬, 周龙泉. 邯郸市周边断裂带的活动特征分析[J]. 地震地质, 2012, 34(1): 100-109.

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