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地质力学学报:2011,17(1):27-40
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龙门山断裂带WFSD 数字地震台网监测能力及动态范围分析
(1.国土资源部新构造运动与地质灾害重点实验室,北京 100081;2.中国地质科学院地质力学研究所,北京 100081)
ANALYSIS UPON DYNAMIC RANGE AND MONITORING CAPABILITY OF WFSD DIGITAL SEISMIC NETWORK OF THE LONGMENSHAN FAULT ZONE
(1.Key Lab of Neotectonic Movement and Geohazards,Ministry of Land and Resources,Beijing 100081,China;2.Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China)
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投稿时间:2010-10-25    
中文摘要: 5.12 汶川特大地震后,为了监测地震的发展趋势,探讨大范围的构造应力场作用,在龙门山断裂带上及时布设临时数字地震台网。数字台网由11 个数字地震台组成,遍布龙门山断裂带的北东缘和南西端。为了分析WFSD 数字地震台网监测能力及其动态范围,随机抽取一定数量台站观测数据,通过傅立叶变换和功率谱密度分析,获得台基地动噪声均值,进而分析观测系统的动态范围和台网监测能力。根据计算结果与记录的大量微震对比研究,表明在龙门山断裂带上,WFSD数字地震台网具有监测ML 1.5 级微地震的能力,且与中国地震局台网中心发布的地震结果基本吻合。因此,WFSD 数字地震台网可为龙门山断裂带变形机制研究提供基础的观测资料。
Abstract:After the 5.12 earthquake in Wenchuan,the temporary digital seismic network has been layout in time in Longmenshan fault zone in order to monitor earthquake trends and probe into the large-scale tectonic stress field activity.Digital seismic network is made of 11 digital seismic instruments,and which are arranged at north eastern margin and southwestern side of Longmenshan fault zone.A certain number of data from observation stations are randomly selected in order to analyze the monitoring capability and dynamic range of WFSD digital seismic network.The dynamic noises of station base are acquired through the Fourier Transform and power spectral density analysis.And then,the dynamic range of observing systems and monitoring capacity of network are analyzed.WFSD digital seismic network has a monitoring ML1.5 micro-seismic capacity in Longmenshan fault zone based on Comparing the computing results with the record of a large number of micro-seismic.And it basically accorded with the results of that by Seismological Bureau Networks Center of China.Therefore,WFSD digital seismic network can provide a basic observing datum for the deformation mechanism research of Longmenshan fault zone.
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基金项目:科技支撑计划项目"汶川地震断裂带科学钻探"— "井中科学探测"课题、"地震断裂带的应力环境、应变能的分布及其与地震关系"课题和地调项目(1212010916064) 联合资助。
引用文本:
马秀敏,彭华,姜景捷,等,2011.龙门山断裂带WFSD 数字地震台网监测能力及动态范围分析[J].地质力学学报,17(1):27-40.DOI:
MA Xiu-min,PENG Hua,JIANG Jing-jie,et al,2011.ANALYSIS UPON DYNAMIC RANGE AND MONITORING CAPABILITY OF WFSD DIGITAL SEISMIC NETWORK OF THE LONGMENSHAN FAULT ZONE[J].Journal of Geomechanics,17(1):27-40.DOI:

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