利用数字地震波资料研究宁夏地区介质非弹性衰减和场地响应

英文篇名：STUDY ON INELASTIC ATTENUATION AND SITE RESPONSE OF EACH STATION IN NINGXIA AREA BY USING WAVEFORM DATA FROM DIGITAL SEISMIC STATION NETWORK
中文刊名：大地测量与地球动力学
英文刊名：Journal of Geodesy and Geodynamics
作者：许英才 ; 许文俊 ; 李鸿庭 ; 陈继锋
英文作者：Xu Yingcai{1)} ; Xu Wenjun{1)} ; Li Hongting{1)} and Chen Jifeng{2)}1)Earthquake Administration of Ningxia Hui Autonomous Region ; Yinchuan 7500012)Earthquake Administration of Gansu Province ; Lanzhou 730001
中文关键词：宁夏地区 ; Q值 ; 遗传算法 ; 场地响应 ; 非弹性衰减
英文关键词：Ningxia area ; Q value ; genetic algorithm ; site response ; inelastic attenuation
出版日期：2011-06-15
机构：宁夏回族自治区地震局;甘肃省地震局;
年：2011
期：S1
出版单位：大地测量与地球动力学

摘要

利用宁夏及邻区的数字地震波资料,选取2009-05—2010-10月ML2.6以上的20个台站32次地震事件的268条波形记录,用遗传算法反演了宁夏及邻区介质非弹性衰减系数和台站场地相应。反演得到:宁夏地区介质非弹性衰减Q值与频率的关系为Q(f)=337.67f0.4554。其Q值和山西及浙江地区的结果最相近,可能预示着该区地质构造活动处于一个正常的活动水平。
268 pieces of digital oscillograms of 32 seismic events of form M-L2.6 to M-L4.9 recorded at 20 seismologic stations located on Ningxia region and its adjacent areas occurred from May,2009 to Oct.,2010 were studied and the relation of inelastic attenuation Q value with media frequency in the crust of this area,the site responses of 20 stations were calculated with the genetic algorithm.The results indicate that the frequency-dependent relation of inelastic attenuation value Q in the studied area is estimated as: Q(f)=337.67f+{0.455 4}.The Q value is close to the regional result in Shanxi and Zhejiang.It probably indicate that the geological tectonic activity is in a normal level.

引文

1刘杰,等.华南地区地震动衰减和场地响应的研究[J].地球物理学报,2003,46(1)54-61.
    2刘杰,郑斯华,黄玉龙.利用遗传算法反演非弹性衰减系数、震源参数和和场地响应[J].地震学报,2003,25(2):211-218.
    3陈章立.浅论地震预报地震学基础[M].北京:地震出版社,2004.
    4陈章立.数字地震观测资料应用研究[M].北京:地震出版社,2007.
    5陈章立.新的地震参数、介质参数的测定及新参数地震目录编制(数据处理方法与软件)[S].中国地震局监测预报司,2007.
    6Atkinson G Mand Mereu R F.The shape of ground attenuation curves in Southeastern Canada[J].Bull Seism Soc A-mer.,1992,82:2 014-2 031.
    7Moya A and Jorge A.Inverson of source parameters and siteefects from strong ground motion record using genetic algo-rithms[J].Bull Seism Sec Amer.,2000,90:977-992.