中国大陆及其分区余震序列b值的统计特征分析
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摘要
该文研究1966—1999年中国大陆及其分区的浅源主震型序列余震强度分布b值的统计特征。对于中国大陆整体而言,88个震例样本的b值平均为0.73±0.19。进一步将中国大陆划分为四个分区:西北地区(29个震例样本)、西南地区(29个震例样本)、华北地区(25个震例样本)和华南地区(5个震例样本)。选取样本多的前三者作为本文研究区。它们的b值平均()分别为0.62±0.17、0.86±0.17和0.69±0.14。根据平均值之间差异显著性的Z检验,研究分区之间b值平均在90%以上的显著性水平上的差别是明显的。该文还对比研究了不同板块构造背景的中国大陆(88个震例样本,=0.73±0.19)、美国南加洲(39个震例样本,=1.06±0.26)和日本地区(57个震例样本,=0.85±0.26)之间,浅源余震序列b值平均的差异显著性。
This paper investigated the statistical characteristics of b values of aftershock series in China continent and its subregions during 1966—1999. For the whole China continent, the mean of b values is 0.73±0.19, based on 88 samples of aftershock series. Further the China continent is divided into four sub-regions: Northwestern region (29 samples), Southwestern region (29 samples), North China region (25 samples) and Southeast region (5 samples). We choose the front three regions with more samples as studied ones in this paper, its means of b values ()are 0.62±0.17, 0.86±0.17 and 0.69±0.14 respectively. According to the Z-test on the differences of two means, the difference among the means of b values for the sub-regions is obviously at 90% or more significant level. This paper also investigated the significant difference among the means of b values of aftershock series for shallow earthquakes in China continent (=0.73±0.19), South California of USA (=1.06±0.26) and Japan region (=0.85±0.26).
This paper investigated the statistical characteristics of b values of aftershock series in China continent and its subregions during 1966—1999. For the whole China continent, the mean of b values is 0.73±0.19, based on 88 samples of aftershock series. Further the China continent is divided into four sub-regions: Northwestern region (29 samples), Southwestern region (29 samples), North China region (25 samples) and Southeast region (5 samples). We choose the front three regions with more samples as studied ones in this paper, its means of b values ()are 0.62±0.17, 0.86±0.17 and 0.69±0.14 respectively. According to the Z-test on the differences of two means, the difference among the means of b values for the sub-regions is obviously at 90% or more significant level. This paper also investigated the significant difference among the means of b values of aftershock series for shallow earthquakes in China continent (=0.73±0.19), South California of USA (=1.06±0.26) and Japan region (=0.85±0.26).
引文
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[22]Meyer S L.Data analysis for scientists and engineers[M].John Wiley&Sons New York,1975.235.
[23]Kisslinger C.Aftershock and fault-zone properties[J].Advances in Geophysics,1996.38:1-36.
[24]Scholz C H.The Mechanics of Earthquake and Faulting[M].Cambridge University Press,USA.1990.
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[26]Scholz C H,Aviles C A,Wesnousky S G.Scaling differences between large interpolate and intra-plate earthquakes[J].Bull Seismol Soc Am,1986,76(1):65-70.
[27]Wiemer S,Gerstenberger M,Hauksson E.Properties of aftershock sequence of the1999MW7.1Hector Mine earthquake:I mplications for aftershock hazard[J].Bull Seismol Soc Amer,2002,92(4):1227-1240.
[2]Gutenberg B,Richter C F.Seismicity of the earth and associated phenomena[M].Princeton Univer-sity Press.1949.
[3]Utsu T.Statistical features of seismicity,International handbook of earthquake and engineering seis-mology(edited by William H K.Lee et al)[M].International Geophysics Series Academic Press Elservier Amsterdam,2002,81A:719-731.
[4]Scholz C H.The frequency-magnitude relation of microfracturing in rock and its relation to earth-quakes[J].Bull Seismol Soc Am,1968,58:399-415.
[5]Mogi K.Study of the elastic Shocks Caused by the fracture of heterogeneous materials and its rela-tion to earthquake phenomena[J].Bull Earthquake Res Inst Univ of Tokyo,1962,40:125-173.
[6]Kisslinger C,Jones L M.Properties of aftershock sequences in southern California[J].J Geophys Res,1991,96(B7):11947-11958.
[7]Utsu T.Aftershocks and earthquake statistics(Ⅰ)Some parameters which characterize after-shock sequence and their interrelation[J].J Fac Sci Hokkaido Univ,SerⅦ,1969,3(3):129-195.
[8]孙文福,顾浩鼎.具有独立过程的地震序列震级—频度分布[J].地震学报,1992,14(3):273-280.
[9]王筱荣,孙甲宁.新疆地震序列分析研究[J].华南地震,2005,25(4):1-9.
[10]蒋海昆,李永莉,曲延军,等.中国大陆中强地震余震序列类型的空间分布特征[J].地震学报,2006,28(4):389-398.
[11]蒋海昆,郑建常,吴琼,等.中国大陆中强地震余震分布尺度的统计特征[J].地震学报,2007,29(2):151-164.
[12]吴开统,焦远碧,吕培苓,等.地震序列概论[M].北京:北京大学出版社,1990.
[13]张肇诚,罗兰格,李海华,等.中国震例(1966—1975年)[M].北京:地震出版社,1998.
[14]张肇诚,罗兰格,李海华,等.中国震例(1976—1980年)[M].北京:地震出版社,1990.
[15]张肇诚,罗兰格,李海华,等.中国震例(1981—1985年)[M].北京:地震出版社,1990.
[16]张肇诚,郑大林,徐京华.中国震例(1986—1988年)[M].北京:地震出版社,1999.
[17]张肇诚,郑大林,徐京华.中国震例(1989—1991年)[M].北京:地震出版社,2000.
[18]陈棋福,郑大林,车时.中国震例(1992—1994年)[M].北京:地震出版社,2002.
[19]陈棋福,郑大林,刘桂萍,等.中国震例(1995—1996年)[M].北京:地震出版社,2002.
[20]陈棋福,郑大林,高荣胜.中国震例(1997—1999年)[M].北京:地震出版社,2003.
[21]张培震,邓起东,张国民,等.中国大陆的强震活动与活动地块[J].中国科学,2003,33(增刊):12-20.
[22]Meyer S L.Data analysis for scientists and engineers[M].John Wiley&Sons New York,1975.235.
[23]Kisslinger C.Aftershock and fault-zone properties[J].Advances in Geophysics,1996.38:1-36.
[24]Scholz C H.The Mechanics of Earthquake and Faulting[M].Cambridge University Press,USA.1990.
[25]Kanamori H.Anderson D L.Theoretical basis of some empirical relations in seismology[J].Bull Seismol Soc Am,1975,65:1073-1095.
[26]Scholz C H,Aviles C A,Wesnousky S G.Scaling differences between large interpolate and intra-plate earthquakes[J].Bull Seismol Soc Am,1986,76(1):65-70.
[27]Wiemer S,Gerstenberger M,Hauksson E.Properties of aftershock sequence of the1999MW7.1Hector Mine earthquake:I mplications for aftershock hazard[J].Bull Seismol Soc Amer,2002,92(4):1227-1240.
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