现代弱震与历史强震联合计算b值方法及分析
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摘要
本文以工程地震中划分、研究的六盘山-祁连山地震带和银川-河套地震带为例,分析了应用现代弱震资料与历史强震资料分时段年发生率联合方法求解某一地震带b值的必要性和可行性。通过联合现代弱震资料及历史中强以上地震资料,利用分时段不同震级档地震的年发生率进行拟合,给出六盘山-祁连山地震带b值为0.61±0.121,银川-河套地震带b值为0.68±0.075。所给出的结果对分析这两个地震带上工程地震安全性评价结果有重要意义,同时也对其它地震带工程地震安全性评价中b值的计算分析有一定参考价值。
Taking Liupanshan-Qilianshan and Yinchuan-Hetao seismic zones divided and researched in earthquake engineering as examples.We analyze necessity and feasibility of estimating value b for a seismic zone by a joint approach of modern weak shocks and annual incidence of sub-periods big earthquake in history.Jointing modern weak shocks and big earthquake in history and fitting annual incidence of earthquake in different periods and at different earthquake magnitudes,the estimated b values for Liupanshan-Qilianshan seismic zone and Yinchuan-Hetao seismic zone are 0.61±0.121 and 0.68±0.075 respectively The results are important for analyzing safety evaluation of the two seismic zones in earthquake engineering.At the same time,the results have some reference value for calculating and analyzing value b in safety evaluation of other seismic zones in earthquake engineering.
Taking Liupanshan-Qilianshan and Yinchuan-Hetao seismic zones divided and researched in earthquake engineering as examples.We analyze necessity and feasibility of estimating value b for a seismic zone by a joint approach of modern weak shocks and annual incidence of sub-periods big earthquake in history.Jointing modern weak shocks and big earthquake in history and fitting annual incidence of earthquake in different periods and at different earthquake magnitudes,the estimated b values for Liupanshan-Qilianshan seismic zone and Yinchuan-Hetao seismic zone are 0.61±0.121 and 0.68±0.075 respectively The results are important for analyzing safety evaluation of the two seismic zones in earthquake engineering.At the same time,the results have some reference value for calculating and analyzing value b in safety evaluation of other seismic zones in earthquake engineering.
引文
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[9]孙文福,顾浩鼎.怎样正确计算b值[J].东北地震研究,1992,8(4):13-27.SUN Wenfu,GU Haoding.How is b-value computed correctly[J].Northeastern Seismological Research,1992,8(4):13-27.(in Chinese)
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[11]王阜.地震发生的更新过程模型及其在地震危险性分析中的应用[J].地震工程与工程振动,1986,6(2):17-26.WANG Fu.A renewal process model of earthquake occurrence for seismic hazard estimation[J].Journal of Earthquake Engineering and Engi-neering Vibration,1986,6(2):17-26.(in Chinese)
[12]陈培善,白彤霞,李保昆.b值和地震复发周期[J].地球物理学报,2003,46(4):510-519.CHEN Peishan,BAI Tongxia,LI Baokun.b-value and earthquake occurrence period[J].Chinese Journal of Geophysics,2003,46(4):510-519.(in Chinese)
[2]潘华,李金臣.地震统计区地震活动性参数b值及ν4不确定性研究[J].震灾防御技术,2006,1(3):218-224.PAN Hua,LI Jinchen.Study on uncertainties of seismicity parameters b andν4 in seismic statistical zones[J].Technology for Earthquake DisasterPrevention,2006,1(3):218-224.(in Chinese)
[3]雷建成,高孟潭,吕红山,等.地震带划分方案对地震活动性参数的影响[J].地震学报,2010,32(4):457-465.LEI Jiancheng,GAO Mengtan,LHongshan,et al.Effects of seismic belt division scheme on seismicity parameters[J].Acta Seismologica Sinica,2010,32(4):457-465.(in Chinese)
[4]王海涛,李莹甄,屠泓为.新疆历史地震目录完整性分析[J].内陆地震,2006,20(l):10-17.WANG Haitao,LI Yingzhen,TU Hongwei.Analysis on integrity of Xinjiang historical earthquake catalogue[J].Intand Earthquake,2006,20(1):10-17.(in Chinese)
[5]Utsu T.Statistical features of seismicity,International handbook of earthquake and engineering seismology[M].Edited byWilliam H K.Lee,et al.International Geophysics Series Academic Press Elservier msterdam,2002,81A:719-731.
[6]黄玮琼,时振梁,曹学锋.b值统计中的影响因素及危险性分析中b值的选取[J].地震学报,1989,11(4):351-361.HUANG Weiqiong,SHI Zhenliang,CAO Xuefeng.Factors influencing the estimation of b value and the selection of b value in hazard analysis[J].Acta Seismologica Sinica,1989,11(4):351-361.(in Chinese)
[7]黄玮琼,李文香,曹学锋.中国大陆地震资料完整性研究之一——以华北地区为例[J].地震学报,1994,16(3):273-280.HUANG Weiqiong,LI Wenxiang,CAO Xuefeng.Analysis on integrity of China historical earthquake catalogue—take North China for example[J].Acta Seismologica Sinica,1994,16(3):273-280.(in Chinese)
[8]黄玮琼,吴宣.统计时段对地震活动性参数估计的影响[J].地震学报,2001,23(6):588-595.HUANG Weiqiong,WU Xuan.Influence of statistical time range on estimating seismicity parameters[J].Acta Seismologica Sinica,2001,23(6):588-595.(in Chinese)
[9]孙文福,顾浩鼎.怎样正确计算b值[J].东北地震研究,1992,8(4):13-27.SUN Wenfu,GU Haoding.How is b-value computed correctly[J].Northeastern Seismological Research,1992,8(4):13-27.(in Chinese)
[10]沈建文,余湛,邱瑛.地震安评中地震活动性的统计区域与b值[J].国际地震动态,2007,339(3):1-6.SHEN Jianwen,YU Zhan,QIU Ying.Statistical zone in seismic safety evaluation and b value[J].Recent Developments in World Seismology,2007,339(3):1-6.(in Chinese)
[11]王阜.地震发生的更新过程模型及其在地震危险性分析中的应用[J].地震工程与工程振动,1986,6(2):17-26.WANG Fu.A renewal process model of earthquake occurrence for seismic hazard estimation[J].Journal of Earthquake Engineering and Engi-neering Vibration,1986,6(2):17-26.(in Chinese)
[12]陈培善,白彤霞,李保昆.b值和地震复发周期[J].地球物理学报,2003,46(4):510-519.CHEN Peishan,BAI Tongxia,LI Baokun.b-value and earthquake occurrence period[J].Chinese Journal of Geophysics,2003,46(4):510-519.(in Chinese)
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