中国大陆及邻近地区Lg尾波的Q值分布
摘要
10个中国数字地震台网（CDSN）台站和5个全球地震台网（GSN）台站所记录的785个浅源地震的宽带垂直分量,被用来研究中国大陆及邻近地区Lg尾波的衰减特性.首先运用叠加谱比法对各记录进行处理,得到与各路径相对应的椭圆内Lg尾波的Q0（1Hz处的Q值）和频率相关因子η的平均值.迸一步应用反投影技术,得到Lg尾波的Qo值和η值的成像图及其误差分布.结果表明,在所研究的范围内,Qo在200～500的范围内变化.最低的Qo发生在滇藏地区;最高的Qo发生在西伯利亚地台的南端.η值的变化范围在0.3～0.8之间.对于所研究的大部分地区,η值呈现出与Qo值的反向变化关系.
引文
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2 Herrmann R B, Kijko A. Modeling some empirical Lg relations. Bull Seism Soc Am, 1983, 56: 257-272
3 Wang C Y, Herrmann R B. Synthesis of coda waves in layered medium. Pure Appl Geophys, 1988, 128: 7-42
4 Zhang T, Lay T. Why the Lg phase does not traverse oceanic crust. Bull Seismol Soc Am, 1995, 85: 1665-1678
5 Aki K. Analysis of the seismic coda of local earthquakes as scattered waves. J Geophys Res, 1969, 74: 615-631
6 Suteau A M, Whitcomb J H. A local earthquake coda magnitude and its relation to duration, moment M0 and local magnitude ML. Bull Seism Soc Am, 1979, 69: 353-368
7 Herrmann R B. Qestimates using coda of local earthquakes. Bull Seism Soc Am, 1980, 70: 447-469
8 Xie J, Nuttli O W. Interpretation of high-frequency coda at large distances: stochastic modeling and method of inversion. Geophysical Journal, 1988, 95: 579-595
9 Xie J, Mitchell B R. A back-projection method for imaging large-scale lateral variations of L8 coda Q with application to continental Africa. Geophys J Int, 1990, 100: 161-181
10 Baqer S, Mitchell B J. Regional variations of Lg coda Q in the continental United States and its relation to crustal structure and evolution. Pure Appl Geophys, 1998, 158: 613-638
11 De Souxa J L. Mitchell B J Lg coda Q variations across South America and their relation to erustal evolution. Pure Appl Geophys, 1998. 158: 587-612
12 Cong L. Mitchell B J. Lg coda Q and its relation to the Geology and tectonics of the Middle East. Pure Appl Geophys. 1998, 158: 563-585
13 Mitchell B J. Baqer S. Akinci A, et al. Lg coda Q in Australia and its relation to crustal structure and evolution. Pure Appl Geophys. 1998. 158:639-653
14 Mitchell B J, Pan Y, Xie J, et al. Lg coda Q variation across Eurasia and its relation to crustal evolution. J Geophys Res, 1997. 102: 22767-22779
15秦家政,阚荣举.用近震尾波估算昆明及周围地区的Q值及地震矩.地球物理学报,1986,29（2）:145～155
16樊计昌,李松林,赖晓玲,等.新疆伽师地震区三维Q值成像,地震学报,2001,23（6）:571～581
17李光品,徐国明,高字根,等.中国东部地壳上地幔横波品质因子的三维层析成像.地震学报,2000.22（1）73～81
18黄汲清（指导）.任纪舜,姜春发,张正坤,等（执笔）.中国大地构造及其演化.北京:科学出版社,1980,29～66
19宋仲和 陈国英,安昌强,等.中国大陆及其相临海域瑞利彼群速度分布特征.地震学报,1993,15（1）:32～38
20宋仲和,陈国英,安昌强,等.中国大陆及其海域地壳-上地幔三维速度结构.中国科学,B辑,1993,23（2）:180～188
21高 山,骆庭川,张本仁,等.中国东部地壳的结构和组成.中国科学,D辑,1999.29（3）:204～213
22胥 颐,刘福田,刘建华,等.中国大陆西北造山带及吡邻盆地的地震层析成像.中国科学,D辑,2000,30（2）:113～122
23 Nuttli O W Lg magnitudes and yield estimates for underground Novaya Zemlya nuclear explosions. Bull Seism Soc Am, I988. 78: 873-884
24 Humphreys E. Clayton R W. Adaptation of back projection tomography to seismic travel time problems. J Geophys Res, 1988. 93: 1073-1086
25 Mitchell B J. Anelastic structure and evolution of the continental crust and upper mantle from seismic surface wave attenuation. Rev Geophys, 1995, 33: 441-462
26汪辑安,徐 青,张文仁、等.云南大地热流及地热地质问题.地震地质,1990,12（4）:367～377
2 Herrmann R B, Kijko A. Modeling some empirical Lg relations. Bull Seism Soc Am, 1983, 56: 257-272
3 Wang C Y, Herrmann R B. Synthesis of coda waves in layered medium. Pure Appl Geophys, 1988, 128: 7-42
4 Zhang T, Lay T. Why the Lg phase does not traverse oceanic crust. Bull Seismol Soc Am, 1995, 85: 1665-1678
5 Aki K. Analysis of the seismic coda of local earthquakes as scattered waves. J Geophys Res, 1969, 74: 615-631
6 Suteau A M, Whitcomb J H. A local earthquake coda magnitude and its relation to duration, moment M0 and local magnitude ML. Bull Seism Soc Am, 1979, 69: 353-368
7 Herrmann R B. Qestimates using coda of local earthquakes. Bull Seism Soc Am, 1980, 70: 447-469
8 Xie J, Nuttli O W. Interpretation of high-frequency coda at large distances: stochastic modeling and method of inversion. Geophysical Journal, 1988, 95: 579-595
9 Xie J, Mitchell B R. A back-projection method for imaging large-scale lateral variations of L8 coda Q with application to continental Africa. Geophys J Int, 1990, 100: 161-181
10 Baqer S, Mitchell B J. Regional variations of Lg coda Q in the continental United States and its relation to crustal structure and evolution. Pure Appl Geophys, 1998, 158: 613-638
11 De Souxa J L. Mitchell B J Lg coda Q variations across South America and their relation to erustal evolution. Pure Appl Geophys, 1998. 158: 587-612
12 Cong L. Mitchell B J. Lg coda Q and its relation to the Geology and tectonics of the Middle East. Pure Appl Geophys. 1998, 158: 563-585
13 Mitchell B J. Baqer S. Akinci A, et al. Lg coda Q in Australia and its relation to crustal structure and evolution. Pure Appl Geophys. 1998. 158:639-653
14 Mitchell B J, Pan Y, Xie J, et al. Lg coda Q variation across Eurasia and its relation to crustal evolution. J Geophys Res, 1997. 102: 22767-22779
15秦家政,阚荣举.用近震尾波估算昆明及周围地区的Q值及地震矩.地球物理学报,1986,29（2）:145～155
16樊计昌,李松林,赖晓玲,等.新疆伽师地震区三维Q值成像,地震学报,2001,23（6）:571～581
17李光品,徐国明,高字根,等.中国东部地壳上地幔横波品质因子的三维层析成像.地震学报,2000.22（1）73～81
18黄汲清（指导）.任纪舜,姜春发,张正坤,等（执笔）.中国大地构造及其演化.北京:科学出版社,1980,29～66
19宋仲和 陈国英,安昌强,等.中国大陆及其相临海域瑞利彼群速度分布特征.地震学报,1993,15（1）:32～38
20宋仲和,陈国英,安昌强,等.中国大陆及其海域地壳-上地幔三维速度结构.中国科学,B辑,1993,23（2）:180～188
21高 山,骆庭川,张本仁,等.中国东部地壳的结构和组成.中国科学,D辑,1999.29（3）:204～213
22胥 颐,刘福田,刘建华,等.中国大陆西北造山带及吡邻盆地的地震层析成像.中国科学,D辑,2000,30（2）:113～122
23 Nuttli O W Lg magnitudes and yield estimates for underground Novaya Zemlya nuclear explosions. Bull Seism Soc Am, I988. 78: 873-884
24 Humphreys E. Clayton R W. Adaptation of back projection tomography to seismic travel time problems. J Geophys Res, 1988. 93: 1073-1086
25 Mitchell B J. Anelastic structure and evolution of the continental crust and upper mantle from seismic surface wave attenuation. Rev Geophys, 1995, 33: 441-462
26汪辑安,徐 青,张文仁、等.云南大地热流及地热地质问题.地震地质,1990,12（4）:367～377
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