福建及台湾海峡西侧地壳一维速度结构研究  

Inversion for the 1D velocity model of onshore-offshore in Fujian area

作　　者：金震 李山有[1] 蔡辉腾[2] 李培[2] 李海艳 徐嘉隽[2] JIN Zhen;LI Shanyou;CAI Huiteng;LI Pei;LI Haiyan;XU Jiajun(Institute of Engineering Mechanics, China Earthquake Administration,Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration, Harbin 150080 China;Earthquake Administration of Fujian Province, Fuzhou 350000 China)

机构地区：[1]中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]福建省地震局,福建福洲350000

出　　处：《地震工程与工程振动》2018年第3期81-93,共13页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(41474071);地震行业科研专项项目(2015419015);中国地震局工程力学研究所基本科研业务费专项资助项目(2016A03).

摘　　要：根据福建及台湾海峡地区2008-2016年M>1级的地震(共656个),以及福建陆域实施的由18次人工爆破测线构成的三维人工地震测深工程实验数据,利用Kissing提出的"最小一维速度结构"的方法联合反演福建及台湾海峡地区一维速度模型。通过数值模拟试验发现此方法对速度模型的还原能力深部强于浅部,对震源位置还原能力较强。重定位结果表明震中位置未发生较大改变,震中位置主要分布在滨海断裂带,以及长乐-诏安断裂和政和-大埔断裂两条断裂带附近;震源深度主要集中在8~25 km范围内,这表明福建地区的中小地震主要集中在上地壳范围之内。We integrated the datasets from a total of 10 725 P-wave records and 7 450 S-wave records were recorded bacxcccsed on the total of 656 earthquakes in M > 1 in Fujian and Taiwan Strait,and the artificial seismic sounding projects to resolve onshore-offshore deep crustal. Joint inversion Fujian and Taiwan Strait area 1 D velocity model. It is found by numerical simulation that the reduction ability of this method to the velocity model is stronger in the deep part than in the shallow part,and the ability to restore the hypocenter position is stronger. The results show that the location of the hypocenter has not changed greatly. The location of the epicenter is mainly located in the Binhai Fault Changle-Zhao’an Fault and Zhenghe-Dapu Fault. The depth of hypocenter distribution is mainly concentrated in the range of 8 ~ 25 km,which shows that the small and medium earthquakes in the Fujian area are mainly concentrated in the upper crust.

关 键 词：P波速度结构 S波速度结构 最小一维速度模型 福建及台湾海峡西侧 数值模拟 

分 类 号：P315.3[天文地球—地震学]