紫坪铺水库库区介质衰减、台站响应和震源参数研究
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摘要
利用紫坪铺水库数字地震台网和成都区域数字台网中的油榨坪台2004年8月到2008年5月12日汶川大地震前的紫坪铺库区2级以上地震波形资料,采用Atkinson方法计算了紫坪铺水库库区地震波非弹性衰减系数、几何扩散系数和介质品质因子;利用Moya等提出的方法计算了台站场地响应;对震源谱的低频水平和拐角频率进行了联合反演,并计算了紫坪铺库区287次1.6级以上地震的震源波谱参数,同时讨论了它们之间的关系。结果表明:紫坪铺库区Q值与频率的关系为Q(f)=47.8×f~(0.91);场地响应均表现为与频率相关;紫坪铺库区小震地震矩、震级与震源谱拐角频率的依赖关系不明确,这可能与水库诱发地震有关。
Based on digital seismograms recorded by Zipingpu reservoir digital seismic network and YZP station of Chendu Digital Tele-seismic Network from August 2004 to May 2008 before the M8.0 Wenchuan earthquake,the paper calculates the inelastic attenuation,geometrical spreading and Q of the Zipingpu reservoir region using Atkinson's method,and site response using Moya's method.Seismic source parameters of 287 earthquakes with M≥1.6 were calculated and the relations between them discussed.Result shows:The relation between inelastic attenuation Q andfis Q(f)=47.8×f~(0.91);the site response has correlation with f;and the dependence between seismic moment,corner frequency and earthquake magnitude of small earthquakes is not obvious in the Zipingpu reservoir region,which maybe has something to do with reservoir-induced earthquake.
Based on digital seismograms recorded by Zipingpu reservoir digital seismic network and YZP station of Chendu Digital Tele-seismic Network from August 2004 to May 2008 before the M8.0 Wenchuan earthquake,the paper calculates the inelastic attenuation,geometrical spreading and Q of the Zipingpu reservoir region using Atkinson's method,and site response using Moya's method.Seismic source parameters of 287 earthquakes with M≥1.6 were calculated and the relations between them discussed.Result shows:The relation between inelastic attenuation Q andfis Q(f)=47.8×f~(0.91);the site response has correlation with f;and the dependence between seismic moment,corner frequency and earthquake magnitude of small earthquakes is not obvious in the Zipingpu reservoir region,which maybe has something to do with reservoir-induced earthquake.
引文
黄玉龙,郑斯华,刘杰,等,2003.广东地区地震动衰减和场地响应的研究[J].地球物理学报,46(1):54-61.
HUANG Yu-long,ZHENG Si-hua,LIU Jie,et al.2003.Attenuation of ground motion and site response in Guangdong region[J].Chinese J Geophys,46(1 ):54-61(in Chinese).
雷建设,赵大鹏,苏金蓉,等,2009.龙门山断裂带地壳精细结构与汶川地震发震机理[J].地球物理学报,52 (2):339-345.
LEI Jian-she,ZHAO Da-peng,SU Jin-rong,et al.2009.Fine seismic structure under the Longmenshan Fault zone and the mechanism of the large Wenchuan earthquake[J].Chinese J Geophys,52(2):339-345(in Chinese).
雷兴林,马胜利,闻学泽.2008.地表水体对断层应力与地震时空分布影响的综合分析:以紫坪铺水库为例[J].地震地质,30(4):1046-1064.
LEI Xing-lin,MA Sheng-li,WEN Xue-ze.2008.Integrated analysis of stress and regional seismicity by surface loading: A case study of Zipingpu reservoir[J].Seismology and Geology,30(4):1046-1064(in Chinese).
李白基,秦嘉政,钱晓东.2004.云南姚安地区的尾波衰减[J].地震学报,26(1):47-52.
LI Bai-ji,QIN Jia-zheng,QIAN Xiao-dong.2004.The coda attenuation of the Yao'an area in Yunnan Province[J].Acta Seismologica Sinica,26(1 ):47-52(in Chinese).
李白基,秦嘉政,叶建庆,等.2000.腾冲火山区剪切波和尾波衰减初步研究[J].地震研究,23(2):136-142.
LI Bai-ji,QIN Jia-zheng,YE Jian-qing,et al.2000.Primary study on attenuation of shear waves and coda in Tengchong volcano area[J].Journal of Seismological Research,23(2 ):136- 142(in Chinese).
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): 21 1-218.
LIU Jie,ZHENG Si-hua,HUANG Yu-long.2003.The inversion of non-elasticity coefficient,source parameters,site response using genetic algorithms[J].Acta Seismologica Sinica,25(2):211-218(in Chinese).
刘特培,康英.2004.广东地区地震波谱和震源参数某些特征及与地震预报的关系[J].地震地磁观测与研究, 25(6):41一48.
LIU Te-pei,KANG Ying.2004.Some characteristics of the spectra of earthquakes in the Guangdong area and relation to earthquake prediction[J].Seismological and Geomagnetic Observation and Research,25(6):41-48(in Chinese ).
刘学军,叶建庆,蔡绍平,等.2002.姚安地震序列的震源参数研究[J].地震研究,25(3):240-245.
LIU Xue-jun,YE Jian-qing,CAI Shao-ping,et al.2002.Study on focal parameters for the Yaoan earthquake sequence [J].Journal of Seismological Research,25(3 ):240-245(in Chinese).
钱晓东,秦嘉政.2005.澜沧江流域水电工程地区的环境剪应力及震源参数[J].地震研究,28(1):64-70.
QIAN Xiao-dong,QIN Jia-zheng.2005.Ambient shear stress and source parameters in the hydropower engineering region along the Lancangjiang River Valley[J].Journal of Seismological Research,28(1 ):64-70(in Chinese).
沈小七,陈宇卫,刘东旺,等.2005.安徽地区地震波衰减、场地响应及震源新参数的测定[J].地震地磁观测与研究,26(3):1-10.
SHEN Xiao-qi,CHEN Yu-wei,LIU Dong-wang,et al.2005.The determination of seismic wave attenuation,site response and source parameters in Anhui area[J].Seismological and Geomagnetic Observation and Research,26 (3):1-10(in Chinese).
苏有锦,刘杰,郑斯华,等.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.
SU You-jin,LIU Jie,ZHENG Si-hua,et al.2006.Q value of anelastic S-wave attenuation in Yunnan region[J].Acta Seismologica Sinica,28(2):206-212(in Chinese).
王勤彩,高景春,郑斯华,等.2004.华北中北部地面运动衰减研究[J].防灾减灾工程学报,24(3):313-319.
WANG Qin-cai,GAO Jing-chun,ZHENG Si-hua,et al.2004.Attenuation of ground motion in central and north area of North China[J].Journal of Disaster Prevention and Mitigation Engineering,24(3):313-319(in Chinese).
吴建平,黄暖,张天中,等.2009.汶川M_S8.0级地震余震分布及周边区域P波三维速度结构研究[J].地球物理学报,52(2):320-328.
WU Jian-ping,HUANG Yuan,ZHANG Tian-zhong,et al.2009.Aftershock distribution of the Ms 8.0 Wenchuan earthquake and three-dimensional P-wave velocity structure in and around source region[J].Chinese J Geophys,52 (2):320-328(in Chinese).
胥颐,黄润秋,李志伟,等.2009.龙门山构造带及汶川震源区的S波速度结构[J].地球物理学报,52(2):329- 338.
XU Yi,HUANG Rui-qiu,LI Zhi-wei,et al.2009.S-wave velocity structure of the Longmen Shan and Wenchuan earthquake area[J].Chinese J Geophys,52(2):329-338(in Chinese).
姚立殉,钟羽云,张震峰,等.2004.岩体裂隙充水后对拐角频率的影响[J].西北地震学报,26(4):315-321.
YAO Li-xun,ZHONG Yu-yun,ZHANG Zhen-feng,et al.2004.Influence of impregnated rock mass on the corner frequency [J].Northwestern Seismological Journal,26(4 ):315-321(in Chinese).
张永久,程万正.2003.用S波研究雅江地震序列震源波谱[J].中国地震,19(4):340-350.
ZHANG Yong-jiu,CHENG Wan-zheng.2003.Study on source parameters for the Yajiang earthquake sequence using S wave[J].Earthquake Research in China,19(4):340-350(in Chinese).
张永久,彭立国,程万正.2006.马尔康地震序列震源参数研究[J].中国地震,22(1):85-91.
ZHANG Yong-jiu,PENG Li-guo,CHENG Wan-zheng.2006.Study on source parameters of the Maerkang earthquake sequence[J].Earthquake Research in China,22(1 ):85-91(in Chinese).
赵珠,范军,郑斯华,等.1997.龙门山断裂带地壳速度结构和震源位置的精确修定[J].地震学报,19(6): 615-622.
ZHAO Zhu,FAN Jun,ZHENG Si-Hua,et al.1997.Precision determination of the crustal structure and hypocentral locations in the Longmenshan thrust nappe belt[J].Acta Seismologica Sinica,19(6):615-622(in Chinese).
赵翠萍,张智强,夏爱国,等.2004.利用数字地震波资料研究新疆天山中东段地区的介质衰减特征[J].防灾减灾工程学报,24(3):300-305.
ZHAO Cui-ping,ZHANG Zhi-qiang,XIA Ai-guo,et al.2004.Study of attenuation characteristics of the central and eastern Tianshan,Xinjiang using digital seismic waves[.J].Journal of Disaster Prevention and Mitigation Engineering, 24(3 ):300-305(in Chinese).
Atkinson G M,Mereu R F.1992.The shape of ground motion attenuation curves in Southeastern Canada[J].Bull Seism Soc Am,82(5 ):2014-2031.
Bindi D,Spallarossa D,Augliera P,et al.2001.Source parameters estimated from the aftershock of the 1997 Umbria Marche(Italy) seismic sequence[J].Bull Seis Soc Amer,91(3 ):448- 455.
Brune J N.1970.Tectonic stress and spectra of seismic wave from earthquake[J].J Geophys Res,75:4997-5009.
Eric P,Chael.1987.Spectral scaling of earthquakes in the Miramichi region of New Brunswick[J].Bull Seism Soc Am,77:347-365.
Holland J H.1975.Adaptation in Nature and Artificial System[M].University of Michigan Press,Ann Arbor.1-132.
Hough S E,Lees J M,Monastero F.1999.Attenuation and source properties at the Coso Geothermal area,California [J].Bull Seis Soc Amer,89(6):1606-1619.
Moya A and Jorge A.2000.Inversion of source parameters and site effects from strong ground motion record using genetic algorithms[J].Bull Seism Soc Amer,90:977-992.
HUANG Yu-long,ZHENG Si-hua,LIU Jie,et al.2003.Attenuation of ground motion and site response in Guangdong region[J].Chinese J Geophys,46(1 ):54-61(in Chinese).
雷建设,赵大鹏,苏金蓉,等,2009.龙门山断裂带地壳精细结构与汶川地震发震机理[J].地球物理学报,52 (2):339-345.
LEI Jian-she,ZHAO Da-peng,SU Jin-rong,et al.2009.Fine seismic structure under the Longmenshan Fault zone and the mechanism of the large Wenchuan earthquake[J].Chinese J Geophys,52(2):339-345(in Chinese).
雷兴林,马胜利,闻学泽.2008.地表水体对断层应力与地震时空分布影响的综合分析:以紫坪铺水库为例[J].地震地质,30(4):1046-1064.
LEI Xing-lin,MA Sheng-li,WEN Xue-ze.2008.Integrated analysis of stress and regional seismicity by surface loading: A case study of Zipingpu reservoir[J].Seismology and Geology,30(4):1046-1064(in Chinese).
李白基,秦嘉政,钱晓东.2004.云南姚安地区的尾波衰减[J].地震学报,26(1):47-52.
LI Bai-ji,QIN Jia-zheng,QIAN Xiao-dong.2004.The coda attenuation of the Yao'an area in Yunnan Province[J].Acta Seismologica Sinica,26(1 ):47-52(in Chinese).
李白基,秦嘉政,叶建庆,等.2000.腾冲火山区剪切波和尾波衰减初步研究[J].地震研究,23(2):136-142.
LI Bai-ji,QIN Jia-zheng,YE Jian-qing,et al.2000.Primary study on attenuation of shear waves and coda in Tengchong volcano area[J].Journal of Seismological Research,23(2 ):136- 142(in Chinese).
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): 21 1-218.
LIU Jie,ZHENG Si-hua,HUANG Yu-long.2003.The inversion of non-elasticity coefficient,source parameters,site response using genetic algorithms[J].Acta Seismologica Sinica,25(2):211-218(in Chinese).
刘特培,康英.2004.广东地区地震波谱和震源参数某些特征及与地震预报的关系[J].地震地磁观测与研究, 25(6):41一48.
LIU Te-pei,KANG Ying.2004.Some characteristics of the spectra of earthquakes in the Guangdong area and relation to earthquake prediction[J].Seismological and Geomagnetic Observation and Research,25(6):41-48(in Chinese ).
刘学军,叶建庆,蔡绍平,等.2002.姚安地震序列的震源参数研究[J].地震研究,25(3):240-245.
LIU Xue-jun,YE Jian-qing,CAI Shao-ping,et al.2002.Study on focal parameters for the Yaoan earthquake sequence [J].Journal of Seismological Research,25(3 ):240-245(in Chinese).
钱晓东,秦嘉政.2005.澜沧江流域水电工程地区的环境剪应力及震源参数[J].地震研究,28(1):64-70.
QIAN Xiao-dong,QIN Jia-zheng.2005.Ambient shear stress and source parameters in the hydropower engineering region along the Lancangjiang River Valley[J].Journal of Seismological Research,28(1 ):64-70(in Chinese).
沈小七,陈宇卫,刘东旺,等.2005.安徽地区地震波衰减、场地响应及震源新参数的测定[J].地震地磁观测与研究,26(3):1-10.
SHEN Xiao-qi,CHEN Yu-wei,LIU Dong-wang,et al.2005.The determination of seismic wave attenuation,site response and source parameters in Anhui area[J].Seismological and Geomagnetic Observation and Research,26 (3):1-10(in Chinese).
苏有锦,刘杰,郑斯华,等.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.
SU You-jin,LIU Jie,ZHENG Si-hua,et al.2006.Q value of anelastic S-wave attenuation in Yunnan region[J].Acta Seismologica Sinica,28(2):206-212(in Chinese).
王勤彩,高景春,郑斯华,等.2004.华北中北部地面运动衰减研究[J].防灾减灾工程学报,24(3):313-319.
WANG Qin-cai,GAO Jing-chun,ZHENG Si-hua,et al.2004.Attenuation of ground motion in central and north area of North China[J].Journal of Disaster Prevention and Mitigation Engineering,24(3):313-319(in Chinese).
吴建平,黄暖,张天中,等.2009.汶川M_S8.0级地震余震分布及周边区域P波三维速度结构研究[J].地球物理学报,52(2):320-328.
WU Jian-ping,HUANG Yuan,ZHANG Tian-zhong,et al.2009.Aftershock distribution of the Ms 8.0 Wenchuan earthquake and three-dimensional P-wave velocity structure in and around source region[J].Chinese J Geophys,52 (2):320-328(in Chinese).
胥颐,黄润秋,李志伟,等.2009.龙门山构造带及汶川震源区的S波速度结构[J].地球物理学报,52(2):329- 338.
XU Yi,HUANG Rui-qiu,LI Zhi-wei,et al.2009.S-wave velocity structure of the Longmen Shan and Wenchuan earthquake area[J].Chinese J Geophys,52(2):329-338(in Chinese).
姚立殉,钟羽云,张震峰,等.2004.岩体裂隙充水后对拐角频率的影响[J].西北地震学报,26(4):315-321.
YAO Li-xun,ZHONG Yu-yun,ZHANG Zhen-feng,et al.2004.Influence of impregnated rock mass on the corner frequency [J].Northwestern Seismological Journal,26(4 ):315-321(in Chinese).
张永久,程万正.2003.用S波研究雅江地震序列震源波谱[J].中国地震,19(4):340-350.
ZHANG Yong-jiu,CHENG Wan-zheng.2003.Study on source parameters for the Yajiang earthquake sequence using S wave[J].Earthquake Research in China,19(4):340-350(in Chinese).
张永久,彭立国,程万正.2006.马尔康地震序列震源参数研究[J].中国地震,22(1):85-91.
ZHANG Yong-jiu,PENG Li-guo,CHENG Wan-zheng.2006.Study on source parameters of the Maerkang earthquake sequence[J].Earthquake Research in China,22(1 ):85-91(in Chinese).
赵珠,范军,郑斯华,等.1997.龙门山断裂带地壳速度结构和震源位置的精确修定[J].地震学报,19(6): 615-622.
ZHAO Zhu,FAN Jun,ZHENG Si-Hua,et al.1997.Precision determination of the crustal structure and hypocentral locations in the Longmenshan thrust nappe belt[J].Acta Seismologica Sinica,19(6):615-622(in Chinese).
赵翠萍,张智强,夏爱国,等.2004.利用数字地震波资料研究新疆天山中东段地区的介质衰减特征[J].防灾减灾工程学报,24(3):300-305.
ZHAO Cui-ping,ZHANG Zhi-qiang,XIA Ai-guo,et al.2004.Study of attenuation characteristics of the central and eastern Tianshan,Xinjiang using digital seismic waves[.J].Journal of Disaster Prevention and Mitigation Engineering, 24(3 ):300-305(in Chinese).
Atkinson G M,Mereu R F.1992.The shape of ground motion attenuation curves in Southeastern Canada[J].Bull Seism Soc Am,82(5 ):2014-2031.
Bindi D,Spallarossa D,Augliera P,et al.2001.Source parameters estimated from the aftershock of the 1997 Umbria Marche(Italy) seismic sequence[J].Bull Seis Soc Amer,91(3 ):448- 455.
Brune J N.1970.Tectonic stress and spectra of seismic wave from earthquake[J].J Geophys Res,75:4997-5009.
Eric P,Chael.1987.Spectral scaling of earthquakes in the Miramichi region of New Brunswick[J].Bull Seism Soc Am,77:347-365.
Holland J H.1975.Adaptation in Nature and Artificial System[M].University of Michigan Press,Ann Arbor.1-132.
Hough S E,Lees J M,Monastero F.1999.Attenuation and source properties at the Coso Geothermal area,California [J].Bull Seis Soc Amer,89(6):1606-1619.
Moya A and Jorge A.2000.Inversion of source parameters and site effects from strong ground motion record using genetic algorithms[J].Bull Seism Soc Amer,90:977-992.
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