云南姚安地区的尾波衰减
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摘要
20 0 0年 1月 1 5日云南姚安发生了 6 .5级地震 .震后围绕震中区架设了一个由 6套拾震器 记录仪组成的临时数字地震台网 .在所记录的余震中 ,有 40 2次余震有较精确的定位 .依照Sato的单散射模型分析观测的尾波短记录 ,获得了姚安地区地壳的尾波平均品质因子Qc(f) =49f0 .95,f=1 .5～ 2 0 .0Hz,具有高构造活动性区域的衰减特征 .
An earthquake with M=6.5 happened on January 15, 2000 in Yao′an of Yunnan P rovince. After the earthquake, a temporary digital network with 6 detectors arou nd the epicenter area was set up. 402 aftershocks were located more precisely. A ccording to coda shorting recording observed by Sato single scattering model ana lyses, the coda averaging quality factor has been acquired, Q c(f)=49 f 0.95 , f=1.5～20.0 Hz, which has the attenuation characteristics of high tectonic structural active region.
An earthquake with M=6.5 happened on January 15, 2000 in Yao′an of Yunnan P rovince. After the earthquake, a temporary digital network with 6 detectors arou nd the epicenter area was set up. 402 aftershocks were located more precisely. A ccording to coda shorting recording observed by Sato single scattering model ana lyses, the coda averaging quality factor has been acquired, Q c(f)=49 f 0.95 , f=1.5～20.0 Hz, which has the attenuation characteristics of high tectonic structural active region.
引文
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阚荣举,张四昌,晏凤桐,等.1977.我国西南地区现代构造应力场与现代构造活动特征的探讨[J].地球物理学报,20:96～109
李白基,秦嘉政,叶建庆,等.2000a.2000年云南姚安地震的发震断裂[A].见:陈运泰编.中国地震学会第八次学术大会论文摘要集[C].北京:地震出版社,29
李白基,秦嘉政,谢庆茵,等.2000b.云南武定1995年地震余震尾波Qc[J].地震地磁观测与研究,21(2):1～6
秦嘉政.1992.澜沧耿马地震后尾波衰减的区域特征[J].地震学报,14(1):71～82
秦嘉政,刘祖荫,龙晓帆.1995.滇西实验场两次中强地震前后尾波衰减的区域特征分析[J].中国地震,11(3):212～221
王绍晋,龙晓帆,李忠华.2002.2000年1月5日姚安6.5级地震的震源断层与震源应力场[J].中国地震,18(1):59～66
王洋龙.2001.滇中块体构造与地震[A].见:毛玉平编.2000年云南姚安6.5级地震[C].昆明:云南科技出版社,289～209
叶建庆.2001.近场流动数字地震台网监测[A].见:毛玉平编.2000年云南姚安6.5级地震[C].昆明:云南科技出版社,55～84
AkiK .1980.Attenuationofshear wavesinthelithosphereforfrequenciesfrom0.05to25Hz[J].PhysEarthPlantInteri ors,21:50～60
AkiK ,ChouetB .1975.Originofcodawaves:Source,attenuationandscatteringeffects[J].JGeophysRes,80:3322～3342
ChouetB .1979.TemporalvariationintheattenuationofearthquakecodanearStoneCanyon,California[J].GeophysResLett,6:143～146
DominguezT ,RebollarCJ,FabriolH .1997.AttenuationofcodawavesattheCerroPrietoGeothermalField,BajaCalifornia,Mexico[J].BullSeismSocAmer,87:1368～1374
HerrmannRB .1980.Qestimatesusingthecodaoflocalearthquakes[J].BullSeismSocAmer,70:447～468
JinA ,AkiK .1986.TemporalchangeinQcbeforetheTangshanearthquakeof1976andtheHaichengearthquakeof1975[J].JGeophysRes,91:665～673
JinA ,AkiK .1989.SpatialandtemporalcorrelationbetweencodaQ-1 andseismicityanditsphysicalmechanism[J].JGeo physRes,94:14041～14059
RautianTG ,KhalturinVI.1978.Theuseofthecodafordeterminationofearthquakesourcespectrum[J].BullSeismSocAmer,68:923～948
SatoH .1977.Energypropagationincludingscatteringeffects:Singleisotropicscatteringapproximation[J].JPhysEarth,25:27～41
SteckLK ,ProtheroWA ,ScheimerJ.1989.Site dependentcodaQatMonoCraters,Califonia[J].BullSeismSocAmer,79:1559～1574
WongV ,RebollarCJ,MunguiaL .2001.AttenuationofcodawavesattheTresVirgenesvolcanicarea,BajaCaliforniaSur,Mexico[J].BullSeismSocAmer,91:683～693
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