利用Sato模型研究九江-瑞昌地震序列的Q_c值特征
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摘要
利用Sato单次散射模型和九江台的近场数字地震记录,研究了九江-瑞昌地震序列尾波Qc值的变化特征,得到Qc值随频率的变化关系为Qc(f)=19.63±4.81f1.1838±0.0945。以2005年12月3日ML3.9地震为分隔点,序列早期时段地震的Q0值随时间的变化起伏较大,平均值相对较高,余震活动水平也较高;而序列后期时段地震的Q0值随时间的变化相对稳定,平均值相对较低,余震活动水平也较低,这种特征有可能意味着九江-瑞昌地震序列将逐渐转入平静时段。
By use of single scattering model(Sato),the varying characteristics of Qc value of Jiujiang-Ruichang seismic sequence is studied from the digital earthquake record of Jiujiang station.The relation between the frequency and Qc value is Qc(f)=(19.63±4.81)f1.183 8±0.094 5.Before the 2005-12-03 ML3.9 earthquake,the Qc value changed obviously,the mean Qc value was higher,the aftershocks was more active;after this earthquake,the Qc value changed stably,the mean Qc value was lower,the aftershocks was not active.This feature is presumed that the Jiujiang-Ruichang earthquake sequence would come into the quiet state.
By use of single scattering model(Sato),the varying characteristics of Qc value of Jiujiang-Ruichang seismic sequence is studied from the digital earthquake record of Jiujiang station.The relation between the frequency and Qc value is Qc(f)=(19.63±4.81)f1.183 8±0.094 5.Before the 2005-12-03 ML3.9 earthquake,the Qc value changed obviously,the mean Qc value was higher,the aftershocks was more active;after this earthquake,the Qc value changed stably,the mean Qc value was lower,the aftershocks was not active.This feature is presumed that the Jiujiang-Ruichang earthquake sequence would come into the quiet state.
引文
1Aki K.Analysis of the seismic coda of local earthquakes asscattered waves[J].J Geophys Res,1969,74,651-681.
2Aki Kand Chouet B.Origin of coda waves:source,attenua-tion and scattering effects[J].J Geophys Res,1975,80:3322-3342.
3Chouet B.Temporal variation in the attenuation of earth-quake coda near Stone Canyon,California[J].Geophys ResLett,1979,6:143-146.
4Jin A and Aki K.Temporal changes in coda Q before theTangshan earthquake of1976and the Haicheng earthquakeof1975[J].J Geophys Res,1986,91:665-673.
5秦嘉政,刘祖荫,龙晓帆.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,1995,11(3):212～221.5Qin Jiazheng,Liu Zuyin and Long Xiaofan.Analysis on theregional characteristics of coda attenuation both before andafter the1992Qina(Ms=5.4,5.1)earthquakes in Wyepsa[J].Earthquake research in China,1995,11(3):212-221.(in Chinese)
6李白基,等.云南武定1995年地震余震尾波Qc值[J].地震地磁观测与研究,2000,21(2):1～6.6Li Baiji,et al.TheQc(f)of coda from the aftershocks of the1995Wuding earthquake in Yunnan Province[J].Seismo-logical and Geomagnetic observation and research,2000,21(2):1-6.(in Chinese)
7啜永清,等.大同地震序列的尾波Q值变化特征研究[J].地震,2004,24(2):66～72.7Chuo Yongqing,et al.Research on variation characteristicsof seismic code Q value of datong earthquake sequence[J].Earthquake,2004,24(2):66-72.(in Chinese)
8王伟君,刘杰.1999年岫岩地震序列尾波Qc的变化过程[J].地震,2004,24(4):38～44.8Wang Weijun and Liu Jie.Temporal process of S-coda Qcof Xiuyan earthquake sequence in1999[J].Earthquake,2004,24(4):38-44.(in Chinese)
9陈俊华,等.九江-瑞昌5.7级地震余震尾波Qc值分析[J].大地测量与地球动力学,2006,26(3):65～68.9Chen Junhua,et al.Analysis ofQcvalue of coda waves aboutaftershocks of Jiujiang-RuichangMs5.7earthquake[J].Journal of Geodesy and Geodynamics,2006,26(3):65-68.(in Chinese)
10Sato H.Energy propagation including scattering effect:Sin-gle isotropic scattering,approximation[J].Bull Seis Soc A-mer,1977,68:923-948.
11Domingguez Tand Rebollar C J.Attenuation of coda wavesat the Cerro Prieto Geothermal Field,Baja California,Mexico[J].Bull Seis Soc Amer,1997,87:1368-1374.
12Pulli J.Attenuation of coda wave in NewEngland[J].BullSeis Soc Amer,1984,1149-1166.
13李白基,等.云南姚安地区的尾波衰减[J].地震学报,2004,24(1):47～52.13Li Baiji,et al.The coda attenuation of the Yaoan area inYunnan province[J].Acta Seismologica Sinica,2004,24(1):47-52.(in Chinese)
14朱新运,等.基于Sato模型的近震S波尾波Q值求解及分析软件研制[J].地震地磁观测与研究,2005,26(3):63～70.14Zhu Xinyun,et al.Developing on the data processing soft-ware of Q value of local earthquake[J].Seismological andGeomagnetic Observation and Research,2005,26(3):63-70.(in Chinese)
15钱晓东,李白基,秦嘉政.2001年云南施甸Ms5.9地震余震序列尾波Qc值研究[J].地震地磁观测与研究,2004,25(1):9～17.15Qian Xiaodong,Li Baiji and Qin Jiazheng.Study on the Qcvalue of coda for sequence of aftershocks of ShidianMs5.9earthquake in2001in Yunnan[J].Seismological and Geo-magnetic Observation and Research,2004,25(1):9-17.(in Chinese)
16王勤彩,等.张北地震序列的尾波Q值研究[J].防震减灾工程学报,2004,24(1):37～40.16Wang Qincai,et al.The Coda WaveQcValue of ZhangbeiEarthquake Sequence[J].Journal of Disaster Preventionand Mitigation Engineering,2004,24(1):37-40.(inChinese)
17Aki K.A new view of earthquake and volcano precursors[J].Earth Planets Space,2004,56,689-713.
18陈颙,黄庭芳.岩石物理学[M].北京:北京大学出版社,2001.18Chen Yong and Huang Tingfang.Petrophysics[M].Bei-Jing:Beijing University Press,2001.(in Chinese)
19王伟君,刘杰.云南4个地震序列Qc值变化特征对比研究[J].地震,2006,26(1):19～25.19Wang Weijun and Liu Jie.Comparative study on Qc-1temporal variation characteristics for4earthquake se-quences in Yunnan area[J].Earthquake,2006,26(1):19-25.(in Chinese)
20李峰.九江-瑞昌5.7级地震现场波形监测记录分析[J].大地测量与地球动力学,2006,26(增):109～111.20Li Feng.On records of waveform sequence of Jiujiang-RuichangMs5.7earthquake[J].Journal of Geodesy andGeodynamics,2006,26(Supp.):109-111.(in Chinese)
21李峰,翟杰,罗俊秋.九江-瑞昌地震序列震源机制解探讨[J].大地测量与地球动力学,2006,26(增):123-126.21Li Feng,Zhai Jie and Luo Junqiu.On focal mechanism so-lutions of earthquake sequence at Jiujiang-Ruichang in Jian-gxi[J].Journal of Geodesy and Geodynamics,2006,26(Supp.):123-126.(in Chinese)
2Aki Kand Chouet B.Origin of coda waves:source,attenua-tion and scattering effects[J].J Geophys Res,1975,80:3322-3342.
3Chouet B.Temporal variation in the attenuation of earth-quake coda near Stone Canyon,California[J].Geophys ResLett,1979,6:143-146.
4Jin A and Aki K.Temporal changes in coda Q before theTangshan earthquake of1976and the Haicheng earthquakeof1975[J].J Geophys Res,1986,91:665-673.
5秦嘉政,刘祖荫,龙晓帆.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,1995,11(3):212～221.5Qin Jiazheng,Liu Zuyin and Long Xiaofan.Analysis on theregional characteristics of coda attenuation both before andafter the1992Qina(Ms=5.4,5.1)earthquakes in Wyepsa[J].Earthquake research in China,1995,11(3):212-221.(in Chinese)
6李白基,等.云南武定1995年地震余震尾波Qc值[J].地震地磁观测与研究,2000,21(2):1～6.6Li Baiji,et al.TheQc(f)of coda from the aftershocks of the1995Wuding earthquake in Yunnan Province[J].Seismo-logical and Geomagnetic observation and research,2000,21(2):1-6.(in Chinese)
7啜永清,等.大同地震序列的尾波Q值变化特征研究[J].地震,2004,24(2):66～72.7Chuo Yongqing,et al.Research on variation characteristicsof seismic code Q value of datong earthquake sequence[J].Earthquake,2004,24(2):66-72.(in Chinese)
8王伟君,刘杰.1999年岫岩地震序列尾波Qc的变化过程[J].地震,2004,24(4):38～44.8Wang Weijun and Liu Jie.Temporal process of S-coda Qcof Xiuyan earthquake sequence in1999[J].Earthquake,2004,24(4):38-44.(in Chinese)
9陈俊华,等.九江-瑞昌5.7级地震余震尾波Qc值分析[J].大地测量与地球动力学,2006,26(3):65～68.9Chen Junhua,et al.Analysis ofQcvalue of coda waves aboutaftershocks of Jiujiang-RuichangMs5.7earthquake[J].Journal of Geodesy and Geodynamics,2006,26(3):65-68.(in Chinese)
10Sato H.Energy propagation including scattering effect:Sin-gle isotropic scattering,approximation[J].Bull Seis Soc A-mer,1977,68:923-948.
11Domingguez Tand Rebollar C J.Attenuation of coda wavesat the Cerro Prieto Geothermal Field,Baja California,Mexico[J].Bull Seis Soc Amer,1997,87:1368-1374.
12Pulli J.Attenuation of coda wave in NewEngland[J].BullSeis Soc Amer,1984,1149-1166.
13李白基,等.云南姚安地区的尾波衰减[J].地震学报,2004,24(1):47～52.13Li Baiji,et al.The coda attenuation of the Yaoan area inYunnan province[J].Acta Seismologica Sinica,2004,24(1):47-52.(in Chinese)
14朱新运,等.基于Sato模型的近震S波尾波Q值求解及分析软件研制[J].地震地磁观测与研究,2005,26(3):63～70.14Zhu Xinyun,et al.Developing on the data processing soft-ware of Q value of local earthquake[J].Seismological andGeomagnetic Observation and Research,2005,26(3):63-70.(in Chinese)
15钱晓东,李白基,秦嘉政.2001年云南施甸Ms5.9地震余震序列尾波Qc值研究[J].地震地磁观测与研究,2004,25(1):9～17.15Qian Xiaodong,Li Baiji and Qin Jiazheng.Study on the Qcvalue of coda for sequence of aftershocks of ShidianMs5.9earthquake in2001in Yunnan[J].Seismological and Geo-magnetic Observation and Research,2004,25(1):9-17.(in Chinese)
16王勤彩,等.张北地震序列的尾波Q值研究[J].防震减灾工程学报,2004,24(1):37～40.16Wang Qincai,et al.The Coda WaveQcValue of ZhangbeiEarthquake Sequence[J].Journal of Disaster Preventionand Mitigation Engineering,2004,24(1):37-40.(inChinese)
17Aki K.A new view of earthquake and volcano precursors[J].Earth Planets Space,2004,56,689-713.
18陈颙,黄庭芳.岩石物理学[M].北京:北京大学出版社,2001.18Chen Yong and Huang Tingfang.Petrophysics[M].Bei-Jing:Beijing University Press,2001.(in Chinese)
19王伟君,刘杰.云南4个地震序列Qc值变化特征对比研究[J].地震,2006,26(1):19～25.19Wang Weijun and Liu Jie.Comparative study on Qc-1temporal variation characteristics for4earthquake se-quences in Yunnan area[J].Earthquake,2006,26(1):19-25.(in Chinese)
20李峰.九江-瑞昌5.7级地震现场波形监测记录分析[J].大地测量与地球动力学,2006,26(增):109～111.20Li Feng.On records of waveform sequence of Jiujiang-RuichangMs5.7earthquake[J].Journal of Geodesy andGeodynamics,2006,26(Supp.):109-111.(in Chinese)
21李峰,翟杰,罗俊秋.九江-瑞昌地震序列震源机制解探讨[J].大地测量与地球动力学,2006,26(增):123-126.21Li Feng,Zhai Jie and Luo Junqiu.On focal mechanism so-lutions of earthquake sequence at Jiujiang-Ruichang in Jian-gxi[J].Journal of Geodesy and Geodynamics,2006,26(Supp.):123-126.(in Chinese)
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