山西断裂带断层现今活动特征及与中强震关系浅析

地震 ›› 2014, Vol. 34 ›› Issue (4): 143-151.

山西断裂带断层现今活动特征及与中强震关系浅析

李腊月, 许明元, 何庆龙, 刘文龙, 刘辛中, 孙启凯, 杜雪松

中国地震局第一监测中心,天津300180

收稿日期:2013-12-13 修回日期:2014-01-17 发布日期:2020-09-11
作者简介:李腊月（1986-)，女，黑龙江哈尔滨人，硕士研究生毕业，主要从事地壳形变与地震预测研究。
基金资助:
地震行业科研专项（201308009, 201208006),中国地震局第一监测中心科技创新主任基金（2014006) 联合资助

Present-day Fault Activity Characteristics of the Shanxi Fault Zone and its Relationship with Moderate-strong Earthquakes

LI La-yue, XU Ming-yuan, HE Qing-long, LIU Wen-long, LIU Xin-zhong, SUN Qi-kai

First Crust Monitoring and Application Center, CEA, Tianjin. 300180 ,China

Received:2013-12-13 Revised:2014-01-17 Published:2020-09-11

摘要/Abstract

摘要： 断层的运动方式与滑动速率是断层活动性分析的主要内容,本文利用山西地区的10处跨断层流动场地和4处定点台站的观测资料,计算了断层垂直升降累积量、断层垂直活动速率,定量地给出断层现今活动性质与背景活动方式,然后采用主成分分析方法对所有的资料进行综合分析,给出区域内断层活动的总体活动水平。结果表明：山西断裂带大多数断层活动为张性正断层活动,南部断层累积活动量较大,中北部相对较小。断层垂直活动速率综合指标反映出山西断裂带断层总体活动具有较好的趋势性特征,活动规律明显,并且在中强地震前出现显著异常变化,其与山西地区及周边的5.0级以上地震有较好的对应。断层活动在2013年又一次出现了破趋势的异常变化,本文认为对此应引起注意并加强跟踪分析。

关键词: 山西断裂带, 断层活动, 跨断层形变, 主成分分析

Abstract: Slip rates and modes of motion of faults are the main contents in the analysis of fault activity, In this paper, with the observation data from 10 fault-crossing mobile sites and 4 fixed stations in the Shanxi region, we calculate cumulative amount of vertical lifts and vertical activity rates, and give quantitatively the current faulting characteristics and activity background, then the overall faults' activity level is showed quantitatively and objectively by the principal component analysis. The results indicate that most faults in the Shanxi area are in tensional activities, and the cumulative amount of fautt activity is larger in the southern section than in the northern and middle sections. Comprehensive index of fautt vertical activity rate reflects that the entire Shanxi fautt zone shows good trend of faults' activities with regulations, in which remarkable anomalies emerge before moderate- strong earthquakes and corresponde well with M≥5.0 earthquakes in Shanxi and its surrounding area. Anomaly of fautt activity had broken the trend again in 2013, and we should pay much attention to it and enhance tracking and analyzing.

Key words: Seismic activity, Fautt activity, Cross-fautt deformation, Principal compo

中图分类号:

P315.7

李腊月, 许明元, 何庆龙, 刘文龙, 刘辛中, 孙启凯, 杜雪松. 山西断裂带断层现今活动特征及与中强震关系浅析[J]. 地震, 2014, 34(4): 143-151.

LI La-yue, XU Ming-yuan, HE Qing-long, LIU Wen-long, LIU Xin-zhong, SUN Qi-kai. Present-day Fault Activity Characteristics of the Shanxi Fault Zone and its Relationship with Moderate-strong Earthquakes[J]. EARTHQUAKE, 2014, 34(4): 143-151.

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