小江断裂带地震尾波Q_c值特征研究
|
摘要
利用小江断裂带及邻区10个数字地震台记录到的地震波形资料,采用Aki单次散射模型,计算了各台站半径60km范围内地震尾波Qc值,分别拟合得到10个台站的尾波Qc和η值,并用10个台站的平均结果得出了小江断裂带及邻区尾波Qc值与频率的关系。结果表明,小江断裂带及邻区总体上属低值Qc区;尾波Qc值空间差异较大,小江断裂带中段为低Qc值,明显低于北段和南段的Qc值。研究了尾波Qc值在时间上的变化与中强地震的关系。
The coda-wave attenuation factor Qc in the Xiaojiang Fault Zone is estimated through the Aki's single-scattering attenuation model based on the seismic events from January 2000 to December 2009 recorded by 10 regional digital seismic stations.The events are situated within 60 km from the stations.The relation between Qc and f at the 10 stations are fittted as Qc(f)=Q0f0.81.The Qc-value in the Zone is lower than the ones in the other areas of Yunnan.The Qc-value in the middle part of the Zone is much lower than the ones in the north and the south part of the Zone.The relationship between the temporal variation of Qc-value and the mid-strong earthquakes is studied too.
The coda-wave attenuation factor Qc in the Xiaojiang Fault Zone is estimated through the Aki's single-scattering attenuation model based on the seismic events from January 2000 to December 2009 recorded by 10 regional digital seismic stations.The events are situated within 60 km from the stations.The relation between Qc and f at the 10 stations are fittted as Qc(f)=Q0f0.81.The Qc-value in the Zone is lower than the ones in the other areas of Yunnan.The Qc-value in the middle part of the Zone is much lower than the ones in the north and the south part of the Zone.The relationship between the temporal variation of Qc-value and the mid-strong earthquakes is studied too.
引文
啜永清,张淑亮,苏燕,等.2004.大同地震序列的尾波Qc值变化特征研究[J].地震,24(2):66-72.
黄才中,葛焕称.1995.中国东部的尾波衰减特征和Qc值估计[J].地震学报,17(2):196-202.
李白基,秦嘉政.2004.云南姚安地区的尾波衰减[J].地震学报,26(1):47-51.
李琼,秦嘉政,钱晓东.2007.2007年宁洱6.4级地震余震序列尾波Qc值研究[J].地震研究,30(4):337-343.
马宏生,刘杰,张国民,等.2006.云南地区尾波Qc值的分布特征及其初步解释[J].地震,26(3):37-43.
钱晓东,秦嘉政,李白基.2006.澜沧江流域水电工程地区的尾波衰减[J].地震研究,29(3):215-220.
秦嘉政,阚荣举.1986.用近震尾波估算昆明及其周围地区的Qc值及地震矩[J].地球物理学报,29(2):145-155.
秦嘉政,李白基,钱晓东,等.2001.云南武定地震余震近场尾波衰减的区域特征[J].地震学报,23(1):87-97.
秦嘉政,刘祖荫,龙晓帆.1995.滇西试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.
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.
王伟君,刘杰.2004.1999年岫岩地震序列尾波Qc的变化过程[J].地震,24(4):37-44.
Beroza G C,Cole AT,Ellsworth WL.1995.Stability of coda wave attenu-ation during the Loma Prieta,California earthquake sequence[J].JGR,100(B3):3977-3987.
Catherine R D,Woodgold.1990.Estimation ofQin eastern Canada usingcoda waves[J].BSSA,88(2):411-429.
Peng J Y,Aki K,Chouet B,et al.1968.Temporal change in codaQcasso-ciated with the Round Valley,California,eathquake of November23,1984[J].JGR,92(B5):3507-3526.
Singn S,Herrmann R B.1983.Regionalization of crustal codaQin thecontinental United states[J].JGR,88(B1):527-538.
Hartzell S,Leeds A,Frankel A.1996.Site response for urban Los Angelesusing aftershocks of the Northridge earthquake[J].BSSA,86(1B):168-192.
Woodgold C D R.1990.Estimation ofQin eastern Canada using codawaves[J].BSSA,88:411-229.
Xie J,Nuttli O W.1988.Interpretation of high-frequency coda at largedistances:stochastic modeling and method of inversion[J].Geo-physical J Int,95(3):579-595.
Yoshihiro H,Nobuhiko H,Muneyoshi F,et al.2000.Temporal changes incodaQc-1andbvalue due to the static stress changes associated withthe1995Hyogo-ken Nanbu earthquke[J].JGR,105(B3):6141-6151.
黄才中,葛焕称.1995.中国东部的尾波衰减特征和Qc值估计[J].地震学报,17(2):196-202.
李白基,秦嘉政.2004.云南姚安地区的尾波衰减[J].地震学报,26(1):47-51.
李琼,秦嘉政,钱晓东.2007.2007年宁洱6.4级地震余震序列尾波Qc值研究[J].地震研究,30(4):337-343.
马宏生,刘杰,张国民,等.2006.云南地区尾波Qc值的分布特征及其初步解释[J].地震,26(3):37-43.
钱晓东,秦嘉政,李白基.2006.澜沧江流域水电工程地区的尾波衰减[J].地震研究,29(3):215-220.
秦嘉政,阚荣举.1986.用近震尾波估算昆明及其周围地区的Qc值及地震矩[J].地球物理学报,29(2):145-155.
秦嘉政,李白基,钱晓东,等.2001.云南武定地震余震近场尾波衰减的区域特征[J].地震学报,23(1):87-97.
秦嘉政,刘祖荫,龙晓帆.1995.滇西试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.
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.
王伟君,刘杰.2004.1999年岫岩地震序列尾波Qc的变化过程[J].地震,24(4):37-44.
Beroza G C,Cole AT,Ellsworth WL.1995.Stability of coda wave attenu-ation during the Loma Prieta,California earthquake sequence[J].JGR,100(B3):3977-3987.
Catherine R D,Woodgold.1990.Estimation ofQin eastern Canada usingcoda waves[J].BSSA,88(2):411-429.
Peng J Y,Aki K,Chouet B,et al.1968.Temporal change in codaQcasso-ciated with the Round Valley,California,eathquake of November23,1984[J].JGR,92(B5):3507-3526.
Singn S,Herrmann R B.1983.Regionalization of crustal codaQin thecontinental United states[J].JGR,88(B1):527-538.
Hartzell S,Leeds A,Frankel A.1996.Site response for urban Los Angelesusing aftershocks of the Northridge earthquake[J].BSSA,86(1B):168-192.
Woodgold C D R.1990.Estimation ofQin eastern Canada using codawaves[J].BSSA,88:411-229.
Xie J,Nuttli O W.1988.Interpretation of high-frequency coda at largedistances:stochastic modeling and method of inversion[J].Geo-physical J Int,95(3):579-595.
Yoshihiro H,Nobuhiko H,Muneyoshi F,et al.2000.Temporal changes incodaQc-1andbvalue due to the static stress changes associated withthe1995Hyogo-ken Nanbu earthquke[J].JGR,105(B3):6141-6151.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心