利用地震活动性参数b值判断张渤地震带中西段地震危险性
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摘要
利用2000年7月—2017年6月地震资料,计算张渤地震构造带中西段地震活动性参数b值、a值和a/b值。基于沿断裂带的b值空间分布,结合多地震活动参数值组合、历史强震背景分布特点,分析张渤地震构造带中西段不同段落的强震危险性。研究结果表明,河北涿鹿及山西大同一带具有低b值、低a值、较高a/b值的参数组合,反映该区域具有高应力积累,未来具有强震发生的危险。
In this paper, using seismic data from July 2000 to June 2017, the b value, a value and a/b value of the west segment of Zhangjiakou-Bohai seismic tectonic belt are calculated. Based on spatial distribution of b values along fault zones, we analyzed strong earthquake risk on the different sections of western part of Zhangjiakou-Bohai seismic tectonic zones, combining the multiseismic activity parameter values and distribution characteristics on historical strong earthquake background. The results show that the parameter combination characteristics of low b, low a and high a/b values are found in the Zhuolu area of Hebei Province and the Datong area of Shanxi Province, the characteristics reflect the high stress accumulation and the risk of happening strong earthquakes in the areas.
In this paper, using seismic data from July 2000 to June 2017, the b value, a value and a/b value of the west segment of Zhangjiakou-Bohai seismic tectonic belt are calculated. Based on spatial distribution of b values along fault zones, we analyzed strong earthquake risk on the different sections of western part of Zhangjiakou-Bohai seismic tectonic zones, combining the multiseismic activity parameter values and distribution characteristics on historical strong earthquake background. The results show that the parameter combination characteristics of low b, low a and high a/b values are found in the Zhuolu area of Hebei Province and the Datong area of Shanxi Province, the characteristics reflect the high stress accumulation and the risk of happening strong earthquakes in the areas.
引文
金安蜀,刘福田,孙永智.北京地区地壳和上地幔的三维P波速度结构[J].地球物理学报,1980,23(2):172-182.
黄德瑜,冯浩.强震前大范围地震活动性参数的时空扫描[J].地震学报,1981,3(3):283-291.
李建华.燕山南缘北西西向昌平-丰南隐伏活断层的初步研究[J].地震地质,1983,5(4):61-66
聂文英,祝治平,张先康,等.穿过张家口-渤海地震带西缘的折射剖面所揭示的地壳上地幔构造与速度结构[J].地震研究,1998,21(1):94-102.
王辉,曹建玲,荆燕,等.川滇地区强震活动前b值的时空分布特征[J].地震地质,2012,34(3):531-543.
王辉,曹建玲,申旭辉,等.华北地区的背景地震活动及区域未来强震危险性[J].地震,2011,31(2):11-23.
向宏发,方仲景,徐杰,等.三河-平谷8级地震区的构造背景与大震重复性研究[J].地震地质,1988,10(1):15-28.
徐杰,宋长青,楚全芝.张家口-蓬莱断裂带地震构造特征的初步探讨[J].地震地质,1998,20(2):146-154.
易桂喜,闻学泽,范军,等.由地震活动参数分析安宁河-则木河断裂带的现今活动习性及地震危险性[J].地震学报,2004,26(3):294-303.
易桂喜,闻学泽,王思维,等.由地震活动参数分析龙门山-岷山断裂带的现今活动习性与强震危险性[J].中国地震,2006,22(2):l17-125.
易桂喜,闻学泽.多地震活动性参数在断裂带现今活动习性与地震危险性评价中的应用与问题[J].地震地质,2007(2):254-271.
易桂喜,闻学泽,辛华,等.2008年汶川MS 8.0地震前龙门山-岷山构造带的地震活动性参数与地震视应力分布[J].地球物理学报,2011,54(6):1 490-1 500.
易桂喜,闻学泽,辛华,等.龙门山断裂带南段应力状态与强震危险性研究[J].地球物理学报,2013,56(4):1 112-1 120.
余钦范,马杏垣.华北地区航磁图像处理结果和地震构造解释[J].地震地质,1989,11(4):5-14.
郑炳华,虢顺民,徐好民.燕山地区北西向和北西西向断裂构造基本特征初步探讨[J].地震地质,1981,3(2):31-40.
朱艾斓,徐锡伟,甘卫军,等.鲜水河-安宁河-则木河断裂带上可能存在的凹凸体:来自背景地震活动性的证据[J].地学前缘,2009,16(1):218-225.
Aki K.Asperities,barriers,characteristic earthquakes and strong motion prediction[J].J Geophys Res,1984,89(B7):5 867-5 872.
Amitrano D.Brittle-ductile transition and associated seismicity:Experimental and numerical studies and relationship with the b value[J].Journal of Geophysical Research-Solid Earth,2003,108(B1):2 044.
Christophersen A,Smith E G.Foreshock rates from aftershock abundance[J].Bull Seismol Soc Am,2008,98(5):2 133-2 148.
Gutenberg R,Richter C F.Frequency of earthquakes in California[J].Bull Seismol Soc Am,1944,34(4):185-188.Scholz C H.The frequency-magnitude relation to microfracturing in rock and its relation to earthquakes[J].Bull Seismol Soc Am,1968,58(1):399-4 15.
Schorlemmer D,Wiemer S,Wyss M.Variations in earthquake-size distribution across different stress regimes[J].Nature,2005,437(7 085):539-542.
Urhancic T I,Trifu C I,Long J M,et a1.Space-time correlation of b values with stress release[J].Pure Appl Geophys,1992,139(3/4):449-462.
Wiemer S,Wyss M.Mapping the frequency-magnitude distribution in asperities:An improved tech-nique to calculate recurrence times?[J].J Geophys Res,1997,102(B7):15 115-15 128.
Wiemer S,Wyss M.Minimum magnitude of completeness in earthquake catalogs:Examples from Alaska,the western US and Japan[J].Bull Seismol Soc Am,2000,90(4):859-869.
Wyss M,Schorlemmer D,Wiemer S.Mapping asperities by minima of local recurrence time:San Jacinto-Elsinore fault zones[J].JGeophys Res,2000,105(B4):7 829-7 844.
黄德瑜,冯浩.强震前大范围地震活动性参数的时空扫描[J].地震学报,1981,3(3):283-291.
李建华.燕山南缘北西西向昌平-丰南隐伏活断层的初步研究[J].地震地质,1983,5(4):61-66
聂文英,祝治平,张先康,等.穿过张家口-渤海地震带西缘的折射剖面所揭示的地壳上地幔构造与速度结构[J].地震研究,1998,21(1):94-102.
王辉,曹建玲,荆燕,等.川滇地区强震活动前b值的时空分布特征[J].地震地质,2012,34(3):531-543.
王辉,曹建玲,申旭辉,等.华北地区的背景地震活动及区域未来强震危险性[J].地震,2011,31(2):11-23.
向宏发,方仲景,徐杰,等.三河-平谷8级地震区的构造背景与大震重复性研究[J].地震地质,1988,10(1):15-28.
徐杰,宋长青,楚全芝.张家口-蓬莱断裂带地震构造特征的初步探讨[J].地震地质,1998,20(2):146-154.
易桂喜,闻学泽,范军,等.由地震活动参数分析安宁河-则木河断裂带的现今活动习性及地震危险性[J].地震学报,2004,26(3):294-303.
易桂喜,闻学泽,王思维,等.由地震活动参数分析龙门山-岷山断裂带的现今活动习性与强震危险性[J].中国地震,2006,22(2):l17-125.
易桂喜,闻学泽.多地震活动性参数在断裂带现今活动习性与地震危险性评价中的应用与问题[J].地震地质,2007(2):254-271.
易桂喜,闻学泽,辛华,等.2008年汶川MS 8.0地震前龙门山-岷山构造带的地震活动性参数与地震视应力分布[J].地球物理学报,2011,54(6):1 490-1 500.
易桂喜,闻学泽,辛华,等.龙门山断裂带南段应力状态与强震危险性研究[J].地球物理学报,2013,56(4):1 112-1 120.
余钦范,马杏垣.华北地区航磁图像处理结果和地震构造解释[J].地震地质,1989,11(4):5-14.
郑炳华,虢顺民,徐好民.燕山地区北西向和北西西向断裂构造基本特征初步探讨[J].地震地质,1981,3(2):31-40.
朱艾斓,徐锡伟,甘卫军,等.鲜水河-安宁河-则木河断裂带上可能存在的凹凸体:来自背景地震活动性的证据[J].地学前缘,2009,16(1):218-225.
Aki K.Asperities,barriers,characteristic earthquakes and strong motion prediction[J].J Geophys Res,1984,89(B7):5 867-5 872.
Amitrano D.Brittle-ductile transition and associated seismicity:Experimental and numerical studies and relationship with the b value[J].Journal of Geophysical Research-Solid Earth,2003,108(B1):2 044.
Christophersen A,Smith E G.Foreshock rates from aftershock abundance[J].Bull Seismol Soc Am,2008,98(5):2 133-2 148.
Gutenberg R,Richter C F.Frequency of earthquakes in California[J].Bull Seismol Soc Am,1944,34(4):185-188.Scholz C H.The frequency-magnitude relation to microfracturing in rock and its relation to earthquakes[J].Bull Seismol Soc Am,1968,58(1):399-4 15.
Schorlemmer D,Wiemer S,Wyss M.Variations in earthquake-size distribution across different stress regimes[J].Nature,2005,437(7 085):539-542.
Urhancic T I,Trifu C I,Long J M,et a1.Space-time correlation of b values with stress release[J].Pure Appl Geophys,1992,139(3/4):449-462.
Wiemer S,Wyss M.Mapping the frequency-magnitude distribution in asperities:An improved tech-nique to calculate recurrence times?[J].J Geophys Res,1997,102(B7):15 115-15 128.
Wiemer S,Wyss M.Minimum magnitude of completeness in earthquake catalogs:Examples from Alaska,the western US and Japan[J].Bull Seismol Soc Am,2000,90(4):859-869.
Wyss M,Schorlemmer D,Wiemer S.Mapping asperities by minima of local recurrence time:San Jacinto-Elsinore fault zones[J].JGeophys Res,2000,105(B4):7 829-7 844.