用有限强地震动记录校正等震线的估计研究
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摘要
选用获得了加速度记录的2011年4月10日四川炉霍MS5.3及2011年8月11日新疆维吾尔自治区克孜勒尔自治州阿图什市与伽师县交界MS5.8地震,研究其快速生成震动图的偏差校正方法;通过台站实际观测值与借助经验性衰减关系估计值之间的残差分析,提出了利用台站数据对缺少台站地区借助经验性衰减关系估计值的对数偏差校正方法;并比较了圆和椭圆衰减关系模型的对数残差及震动图的分布形态.结果表明,适合于当地地震动衰减关系±3倍标准差的标准能够识别一些台站异常数据,如炉霍MS5.3地震中炉霍地办强震台近场峰值加速度的高频脉冲引起的异常数据;对数偏差校正方法适合于地震动强度速报中缺少台站数据地区借助经验性衰减关系地震动参数估计值的系统偏差校正;圆衰减关系模型只能控制震动的程度,不能控制其分布形态.明确的地震震源机制、震源破裂过程、当地的地质构造背景及余震分布等信息有助于修正震动图的分布形态.
We investigated bias correction method of ShakeMaps based on limited acceleration records for the 10 April 2011 Luhuo,Sichuan,earthquake(MS5.3) and the 11 August 2011 Jiashi,Xinjiang,earthquake(MS5.8).By analyzing residuals between the observed data and calculated values,we proposed a method of logarithmic deviation correction for theoretical estimates in regions lacking seismic observations.We also compared both logarithmic residuals and vibration distribution between circle attenuation model and ellipse attenuation model.Research and analysis show that rules of ±3 times standard deviation of local ground motion attenuation relations can remove some abnormal station data,such as the abnormal data from Luhuo Diban station for Luhuo earthquake due to near-field high-frequency acceleration pulses.During rapid report of ground motion intensity,the method of logarithmic deviation correction is suitable for systematic error correction of theoretical estimates of ground motion parameters.Circle attenuation model can only control the degree of vibration,but can not control its distribution.The information of focal mechanism,rupture process,local geological structure and distribution of aftershocks of an earthquake can help modify the distribution of ShakeMaps.
We investigated bias correction method of ShakeMaps based on limited acceleration records for the 10 April 2011 Luhuo,Sichuan,earthquake(MS5.3) and the 11 August 2011 Jiashi,Xinjiang,earthquake(MS5.8).By analyzing residuals between the observed data and calculated values,we proposed a method of logarithmic deviation correction for theoretical estimates in regions lacking seismic observations.We also compared both logarithmic residuals and vibration distribution between circle attenuation model and ellipse attenuation model.Research and analysis show that rules of ±3 times standard deviation of local ground motion attenuation relations can remove some abnormal station data,such as the abnormal data from Luhuo Diban station for Luhuo earthquake due to near-field high-frequency acceleration pulses.During rapid report of ground motion intensity,the method of logarithmic deviation correction is suitable for systematic error correction of theoretical estimates of ground motion parameters.Circle attenuation model can only control the degree of vibration,but can not control its distribution.The information of focal mechanism,rupture process,local geological structure and distribution of aftershocks of an earthquake can help modify the distribution of ShakeMaps.
引文
陈鲲,俞言祥,高孟潭.2010.考虑场地效应的ShakeMap系统研究[J].中国地震,26(1):92--102.
陈鲲,俞言祥,高孟潭,吕红山.2011.基于震源破裂过程的青海玉树地震震动图研究[J].中国地震,27(1):56--64.
国家强震动台网中心.2011a.四川省数字强震动台网获取炉霍县M5.3地震记录[DB/OL].[2011-04-30].http:∥www.csmnc.net/selnewxjx1.asp?id=768.
国家强震动台网中心.2011b.新疆数字强震动台网获取克孜勒尔自治州阿图什市、伽师县交界M5.8级地震记录[DB/OL].[2011-08-25].http:∥www.csmnc.net/selnewxjx1.asp?id=770.
汪素云,俞言祥,高阿甲,阎秀杰.2000.中国分区地震动衰减关系的确定[J].中国地震,16(2):99--106.
王玉石,周正华,兰日清.2010.利用修正谱烈度确定我国西部地区仪器烈度的建议方法[J].应用基础与工程科学学报,18:119--129.
Abrahamson N A,Youngs R R.1992.A stable algorithm for regression analysis using the random effects model[J].Bull Seism Soc Amer,82(1):505--510.
Allen T I,Wald D J.2006.TopographicSlopeasaProxyforSeismicSiteConditions(V3S0)and AmplificationAround the Globe[R].U S Geological Survey Open-File Report2007-1357:1--69.
Allen T I,Wald D J.2009.On the use of high-resolution topographic data as a proxy for seismic site conditions(V3S0)[J].Bull Seism Soc Amer,99(2A):935--943.
Anderson J G,Brune J N.1999.Probabilistic seismic hazard analysis without the ergodic assumption[J].Seismol ResLett,70(1):19--28.
Atkinson G M,Kaka S I.2007.Relationships between felt intensity and instrumental ground motion in the centralUnited States and California[J].Bull Seism Soc Amer,97(2):497--510.
Boore D M.2001.Effect of baseline corrections on displacements and response spectra for several recordings of the1999Chi-Chi,Taiwan,earthquake[J].Bull Seism Soc Amer,91(5):1199--1211.
Borcherdt R D.1994.Estimates of site-dependent response spectra for design(methodology and justification)[J].Earthquake Spectra,10(4):617--654.
Brillinger D R,Preisler H K.1985.Further analysis of the Joyner-Boore attenuation data[J].Bull Seism Soc Amer,75(2):611--614.
Ebel J,Wald D J.2003.Bayesian estimations of peak ground acceleration and5%damped spectral acceleration fromModified Mercalli Intensity data[J].Earthquake Spectra,19(3):511--529.
Joyner W B,Boore D M.1981.Peak horizontal acceleration and velocity from strong motion records including recordsfrom the1979Imperial Valley,California earthquake[J].Bull Seism Soc Amer,71(6):2011--2038.
Moratto L,Costa G,Suhadolc P.2009.Real-time generation of ShakeMaps in the southeastern Alps[J].Bull Seism SocAmer,99(4):2489--2501.
Rhoades D A,McVerry G H.2001.Joint hazard of earthquake shaking at two or more locations[J].Earthquake Spectra,17(4):697--710.
Teng T L,Wu L D,Shin T C,Tsai Y B,Lee W H K.1997.One minute after:Strong-motion map,effective epicenter,and effective magnitude[J].Bull Seism Soc Amer,87(5):1209--1219.
Toro G W,Abrahamson N A,Schneider J F.1997.Model of strong ground motions from earthquakes in central andeastern North America:Best estimates and uncertainties[J].Seism Res Lett,68(1):41--57.
Wald D J,Worden B C,Quitoriano V,Pankow K L.2006.ShakeMap Manual:Technical Manual,User’s Guide,andSoftware Guide[M/OL].U S Geological Survey.1--156[2012-02-04].http:∥pubs.usgs.gov/tm/2005/12A01/.
Wessel P,Smith W H.1999.The Generic Mapping Tools Technical Reference and Cookbook[M/OL].Version3.3.1,1-132[2012-01-08].http:∥gmt.soest.hawaii.edu/gmt/html/.
Worden C B,Wald D J,Allen T I,Lin K,Garcia D,Cua G.2010.A revised ground-motion and intensity interpolationscheme for ShakeMap[J].Bull Seism Soc Amer,100(6):3083--3096.
Wu Y M,Shin T C,Chang C H.2001.Near real-time mapping of peak ground acceleration and peak velocity followinga strong earthquake[J].Bull Seism Soc Amer,91(5):1218--1228.
Wu Y M,Teng T L,Shin T C,Hsiao N C.2003.Relationship between peak ground acceleration,peak ground velocity,and intensity in Taiwan[J].Bull Seism Soc Amer,93(1):386--396.
陈鲲,俞言祥,高孟潭,吕红山.2011.基于震源破裂过程的青海玉树地震震动图研究[J].中国地震,27(1):56--64.
国家强震动台网中心.2011a.四川省数字强震动台网获取炉霍县M5.3地震记录[DB/OL].[2011-04-30].http:∥www.csmnc.net/selnewxjx1.asp?id=768.
国家强震动台网中心.2011b.新疆数字强震动台网获取克孜勒尔自治州阿图什市、伽师县交界M5.8级地震记录[DB/OL].[2011-08-25].http:∥www.csmnc.net/selnewxjx1.asp?id=770.
汪素云,俞言祥,高阿甲,阎秀杰.2000.中国分区地震动衰减关系的确定[J].中国地震,16(2):99--106.
王玉石,周正华,兰日清.2010.利用修正谱烈度确定我国西部地区仪器烈度的建议方法[J].应用基础与工程科学学报,18:119--129.
Abrahamson N A,Youngs R R.1992.A stable algorithm for regression analysis using the random effects model[J].Bull Seism Soc Amer,82(1):505--510.
Allen T I,Wald D J.2006.TopographicSlopeasaProxyforSeismicSiteConditions(V3S0)and AmplificationAround the Globe[R].U S Geological Survey Open-File Report2007-1357:1--69.
Allen T I,Wald D J.2009.On the use of high-resolution topographic data as a proxy for seismic site conditions(V3S0)[J].Bull Seism Soc Amer,99(2A):935--943.
Anderson J G,Brune J N.1999.Probabilistic seismic hazard analysis without the ergodic assumption[J].Seismol ResLett,70(1):19--28.
Atkinson G M,Kaka S I.2007.Relationships between felt intensity and instrumental ground motion in the centralUnited States and California[J].Bull Seism Soc Amer,97(2):497--510.
Boore D M.2001.Effect of baseline corrections on displacements and response spectra for several recordings of the1999Chi-Chi,Taiwan,earthquake[J].Bull Seism Soc Amer,91(5):1199--1211.
Borcherdt R D.1994.Estimates of site-dependent response spectra for design(methodology and justification)[J].Earthquake Spectra,10(4):617--654.
Brillinger D R,Preisler H K.1985.Further analysis of the Joyner-Boore attenuation data[J].Bull Seism Soc Amer,75(2):611--614.
Ebel J,Wald D J.2003.Bayesian estimations of peak ground acceleration and5%damped spectral acceleration fromModified Mercalli Intensity data[J].Earthquake Spectra,19(3):511--529.
Joyner W B,Boore D M.1981.Peak horizontal acceleration and velocity from strong motion records including recordsfrom the1979Imperial Valley,California earthquake[J].Bull Seism Soc Amer,71(6):2011--2038.
Moratto L,Costa G,Suhadolc P.2009.Real-time generation of ShakeMaps in the southeastern Alps[J].Bull Seism SocAmer,99(4):2489--2501.
Rhoades D A,McVerry G H.2001.Joint hazard of earthquake shaking at two or more locations[J].Earthquake Spectra,17(4):697--710.
Teng T L,Wu L D,Shin T C,Tsai Y B,Lee W H K.1997.One minute after:Strong-motion map,effective epicenter,and effective magnitude[J].Bull Seism Soc Amer,87(5):1209--1219.
Toro G W,Abrahamson N A,Schneider J F.1997.Model of strong ground motions from earthquakes in central andeastern North America:Best estimates and uncertainties[J].Seism Res Lett,68(1):41--57.
Wald D J,Worden B C,Quitoriano V,Pankow K L.2006.ShakeMap Manual:Technical Manual,User’s Guide,andSoftware Guide[M/OL].U S Geological Survey.1--156[2012-02-04].http:∥pubs.usgs.gov/tm/2005/12A01/.
Wessel P,Smith W H.1999.The Generic Mapping Tools Technical Reference and Cookbook[M/OL].Version3.3.1,1-132[2012-01-08].http:∥gmt.soest.hawaii.edu/gmt/html/.
Worden C B,Wald D J,Allen T I,Lin K,Garcia D,Cua G.2010.A revised ground-motion and intensity interpolationscheme for ShakeMap[J].Bull Seism Soc Amer,100(6):3083--3096.
Wu Y M,Shin T C,Chang C H.2001.Near real-time mapping of peak ground acceleration and peak velocity followinga strong earthquake[J].Bull Seism Soc Amer,91(5):1218--1228.
Wu Y M,Teng T L,Shin T C,Hsiao N C.2003.Relationship between peak ground acceleration,peak ground velocity,and intensity in Taiwan[J].Bull Seism Soc Amer,93(1):386--396.
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