云南姚安地震序列震源参数研究
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摘要
2000年1月15日云南姚安发生5.9级和6.5级地震,利用布设在震中附近的6个流动数字地震台所记录的地震波资料,采用波谱分析和Brune理论的方法,得到姚安地震序列震源谱参数和震源参数。结果表明:地震序列的地震矩在108~1014N·m之间,应力降在0.005~10MPa之间,震源半径分布在50~660m之间,并得到地震矩M0和震级ML的关系为:lgM0=8.24+1.4ML。随着地震矩增大应力降增加,拐角频率反而减小;随震级的增大震源半径变大,但震源半径与应力降之间不存在明显的相关关系。
Using the digital waveform data recorded by six temporary digital seismic stations which was closed to the epicenters of the Yao’an M5.9 and M6.5 earthquakes in Jan.15,2000,applying the methods of the spectrum analysis and Brune’theory,we obtained source spectrum parameters and source parameters of Yao’an earthquake sequence.The result shows that the seismic moments of Yao’an earthquake sequence are between 108N·m and 1014 N·m,the stress drops are between 0.005 MPa and 10 MPa,and the source radius is between 50 m and 660 m,and we obtain the relationship between seismic moment M0 and local magnitude ML.With the seismic moment increases the corner frequency reduces,but the stress drop increases.The source radius increases with the magnitude increases,but there is no evidence relationship between source radius and stress drops.
引文
①云南省地震局.2003.2000年云南姚安地震现场台网新参数目录.
    ①云南省地震局.2003.2000年云南姚安地震现场台网新参数目录.
    陈运泰,吴忠良,王培德.2000.数字地震学[M].北京:地质出版社.
    胡家富,丛连理,苏有锦.2003.云南及周边地区Lg尾波Q值的分布特征[J].地球物理学报,46(6):809-813.
    黄玉龙,郑斯华,刘杰.2003,广东地区地震动衰减和场地响应的研究,地球物理学报,46(1):54-61.
    刘杰,郑斯华,黄玉龙.2003.利用遗传算法反演非弹性衰减系数、震源参数和场地响应[J].地震学报,25(2):211-218.
    刘丽芳,刘杰,苏有锦.2006.姚安地震序列与大姚震源参数的对比研究[J].地震,26(1):10-18.
    刘学军,叶建庆,蔡绍平.2002.姚安地震序列的震源参数研究[J].地震研究,25(3):240-245.
    毛燕,徐彦,胡家富.2005.用叠加谱比法研究四川地区Lg尾波Q值的区域性变化[J].云南大学学报(自然科学版),27(2):123-128.
    毛燕.2007.姚安地震余震序列研究[J],地震研究,30(2):142-145.
    苏有锦,刘杰,郑斯华.2006.云南地区S波非弹性衰减Q值研究[J].地震学报,28(2):206-212.
    王培德,吴大铭,程云泰.1988.地震矩、震级、震源尺度及应力降之间的相互关系的研究[J].地壳形变与地震,8(2):109-123.
    赵翠萍,夏爱国,郑斯华.2005,新疆北天山中东段地区震源参数研究[J].中国地震,21(1):61-69.
    Brune J N.1970.Tectonic stress and the spectra of seismic shear wavesfrom earthquake[J].J Geophys Res,75(26):4997-5009.
    Kanamori H.1977.The energy release in great earthquakes[J].Journal ofGeophysical Research,82(20):1981-1987.
    Moya C A,Aguirre J,Irikura K.2000.Inversion of source parameters andsite effects from strong ground motion records using genetic algo-rithms[J].BSSA,90(4):977-992.
    Shi Jin Hua,Kim W Y,Richards P G.1998.The corner frequencies andstress drops of intraplate earthquakes in the Northeastern UnitedStates[J].BSSA,88(2):531-542.
    Atkinson G M,Mereu R F.1992.The shape of ground motion atlenuationcurves in Southeastern Canada[J].BSSA,82(5):2014-2031.

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