利用数字化地震波形资料研究山西中南部地区的非弹性衰减系数、震源参数和场地响应

英文篇名：Study on Non-elastic Attenuation Factor,Source Parameter and Site Response of Central and Southern Regions of Shanxi by Using Digital Seismic Waveform Data
中文刊名：山西地震
英文刊名：Earthquake Research in Shanxi
作者：宋美琴 ; 王秀文 ; 梁向军 ; 贾建喜 ; 程紫燕 ; 唐垒黎
英文作者：SONG Mei-qin ; WANG Xiu-wen ; LIANG Xiang-jun ; JIA Jian-xi ; CHENG Zi-yan ; TANG Lei-li(Earthquake Administration of Shanxi province ; Taiyuan ; Shanxi 030021 ; China)
中文关键词：震源参数 ; 地震波形 ; 场地响应 ; 联合反演
英文关键词：Source parameter ; Seismic wave form ; Site response ; Combined inversion
出版日期：2007-10-15
机构：山西省地震局,山西省地震局,山西省地震局,山西省地震局,山西省地震局,山西省地震局山西太原030021,山西太原030021,山西太原030021,山西太原030021,山西太原030021,山西太原030021
年：2007
期：04
出版单位：山西地震

摘要

利用遗传算法反演山西中南部地区14个地震震源谱的低频水平、拐角频率和7个台站的场地响应。结果表明,Q(f)与频率的关系是:Q(f)=299.4f0.563;7个基岩台中岢岚、东山、阳城台在3 Hz~6 Hz附近有6~8倍的放大、离石台在2 Hz~10 Hz有2~3倍的放大。标量地震矩M。与ML震级线性相关较好,震源半径在230 m~508 m之间;拐角频率和地震矩之间的关系表现为拐角频率随地震矩的减小而增大;应力降和地震矩之间存在着应力降随地震矩的增大而增大的关系。
Low-frequency spectrum levels,corner frequencies of 14 seismological stations,located in the central and southern regions of Shanxi,and site responses of 7 stations among them have been inversed by using genetic algorithms.The result shows that the relation between frequency and Q(f) is Q(f)=299.4f0.563.Among 7 bedrock stations,low-frequency spectrum level of Kelan, Dongshan and Yangcheng stations are magnified 6-8 times around 3-6 Hz and Lishi Station,2-3 times around 2-10 Hz.Scalar seismic moment MO is well linearly correlated with magnitude ML.The source radius is in 230-508 m.Corner frequency increases with the decrease of seismic moment and stress drop increases with the increase of seismic moment.

引文

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