云鹏水电站及其周围地震尾波Q_c值研究
|
摘要
利用云鹏水电站周边5个数字地震台站记录到的2000年1月至2008年12月间的108个地震的数字波形资料,采用Aki单次散射模型,计算了各台站周围423条地震记录的尾波Q0值。结果显示:云鹏水电站地区尾波的Qc值与频率的关系为Qc(f)=90.2f0.94。该地区的Q0值比云南其它构造活动强烈地区的要高,因此属于中等构造活动地区。云鹏水电站蓄水后弥勒台记录到的108个地震的尾波Q0值及分频Qc值有所下降,但下降幅度不大,表明水库蓄水对库区及其附近区域地下介质性质有所影响,但影响的程度有限。
The coda-wave-attenuation-quality factor Q0 in Yunpeng Hydropower Station area and its adjacent regions is estimated using Aki's single-scattering attenuation model based on 108 local seismic events recorded by 5 regional digital seismic stations from January 2000 to December 2008.The result shows that the relationship between Q0 and f can be described as Qc(f)=90.2f 0.94.Compared with the ones in other areas of Yunnan with strong tectonic seismic activity,the values are higher in this area with moderate tectonic activity.The Q0 and Qc values declined a little after the Yunpeng reservoir impounded water;this means that the water storage has influenced the medea character in this area,but the effect is limited.
The coda-wave-attenuation-quality factor Q0 in Yunpeng Hydropower Station area and its adjacent regions is estimated using Aki's single-scattering attenuation model based on 108 local seismic events recorded by 5 regional digital seismic stations from January 2000 to December 2008.The result shows that the relationship between Q0 and f can be described as Qc(f)=90.2f 0.94.Compared with the ones in other areas of Yunnan with strong tectonic seismic activity,the values are higher in this area with moderate tectonic activity.The Q0 and Qc values declined a little after the Yunpeng reservoir impounded water;this means that the water storage has influenced the medea character in this area,but the effect is limited.
引文
安艺敬一.1991.构造活动性的地球物理标志———尾波品质因素[J].魏淳,译.世界地震译丛,(3):68-87.
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.
李琼,钱晓东,秦嘉政.2008.2005年云南文山地震余震序列尾波Qc值研究[J].地震地磁观测与研究,29(3):22-28.
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,李白基,秦嘉政.2004.2001年云南施甸5.9级地震余震序列尾波Qc值研究[J].地震地磁观测与研究,25(1):9-17.
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.
苏有锦,刘祖荫,蔡民军,等.1999.云南地区强震分布的深部地球介质背景[J].地震学报,21(3):313-322.
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.
王伟君,刘杰,陈凌.2006.云南地区尾波衰减特征研究[J].地震学报,28(1):8-19.
徐彦.2002.澄江地震的后续丘北5.5级地震研究[J].西北地震学报,24(1):92-96.
赵小艳,苏有锦,付虹,等.2007.欧亚地震带现代构造应力场及其分区特征[J].地震研究,30(2):146-151.
A k i K.1969.Analysis of the seismic coda of local earthquakes as scatterwaves[J].JGR,74:615-631.
A k i K,Chout B.Origin of coda waves:source,attenuation and scatteringeffects[J].JGR,80:3322-3342.
Ha rtzell S,Leeds A,Frankel A,et al.1996.Site response for urban LosAngeles using aftershocks of the Northridge earthquake[J].BSSA,86:168-192.
P u lli J J.1984.Attenuation of Coda Waves in NewEngland[J].BSSA,74(4):1149-1166.
S in gn S,Herrmann R B.1983.Regionalization of crustal codaQin thecontinental United States[J].JGR,88.527-538.
S ut eau AM,Whitcomb J H.1979.Alocal earthquake coda magnitude andits relation to duration,momentM0and local magnitudeML[J].BSSA,69(2):353-368.
Wo odgold C D R.1990.Estimation ofQin eastern Canada using codawaves[J].BSSA,88.411-429.
Xi e 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.
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.
李琼,钱晓东,秦嘉政.2008.2005年云南文山地震余震序列尾波Qc值研究[J].地震地磁观测与研究,29(3):22-28.
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,李白基,秦嘉政.2004.2001年云南施甸5.9级地震余震序列尾波Qc值研究[J].地震地磁观测与研究,25(1):9-17.
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.
苏有锦,刘祖荫,蔡民军,等.1999.云南地区强震分布的深部地球介质背景[J].地震学报,21(3):313-322.
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.
王伟君,刘杰,陈凌.2006.云南地区尾波衰减特征研究[J].地震学报,28(1):8-19.
徐彦.2002.澄江地震的后续丘北5.5级地震研究[J].西北地震学报,24(1):92-96.
赵小艳,苏有锦,付虹,等.2007.欧亚地震带现代构造应力场及其分区特征[J].地震研究,30(2):146-151.
A k i K.1969.Analysis of the seismic coda of local earthquakes as scatterwaves[J].JGR,74:615-631.
A k i K,Chout B.Origin of coda waves:source,attenuation and scatteringeffects[J].JGR,80:3322-3342.
Ha rtzell S,Leeds A,Frankel A,et al.1996.Site response for urban LosAngeles using aftershocks of the Northridge earthquake[J].BSSA,86:168-192.
P u lli J J.1984.Attenuation of Coda Waves in NewEngland[J].BSSA,74(4):1149-1166.
S in gn S,Herrmann R B.1983.Regionalization of crustal codaQin thecontinental United States[J].JGR,88.527-538.
S ut eau AM,Whitcomb J H.1979.Alocal earthquake coda magnitude andits relation to duration,momentM0and local magnitudeML[J].BSSA,69(2):353-368.
Wo odgold C D R.1990.Estimation ofQin eastern Canada using codawaves[J].BSSA,88.411-429.
Xi e 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.
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