山东地区地震视应力时空变化特征研究
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摘要
本文使用山东地区中小地震的地震数字波形资料,基于Brune圆盘模型得到了2001年1月至2011年7月206个ML≥2.0地震的辐射能量、地震矩、视应力等震源动力学参数。震源参数标度关系分析结果显示,视应力呈现随地震矩增加而增加的趋势,但在视应力较低的2008年9月至2011年3月ML≤2.8震级段,视应力和地震矩之间没有趋势性关系。视应力时空变化特征分析结果表明,山东地区2004年至2007年应力水平明显升高,视应力高值主要集中于安丘—昌邑、莒县—郯城、聊城—兰考断裂、胶东半岛等地区,2009年后处于应力较低水平,但2011年3月开始有升高现象,值得继续关注。
In this paper,by using the waveform data of medium and small earthquakes in Shandong province,we calculated the earthquake energy,seismic moment and apparent stress of 206 ML≥2.0earthquakes from January 2001 to July 2011 based on Brune model.The scaling relations of source parameters turns out that apparent stress increase with the seismic moment,except the earthquakes with ML≤2.8from September 2008 to March2011during which time the apparent stress was low.The temporal and spatial variation of apparent stress shows that the stress level in Shandong province obviously increased from2004 to 2007,and the high value concentrated in Anqu—Changyi,Juxian—Tancheng,Liaocheng—Lankao,and jiaodong peninsula,the stress remained low after 2009 and began to rise from March 2011,which deserves continous concern.
In this paper,by using the waveform data of medium and small earthquakes in Shandong province,we calculated the earthquake energy,seismic moment and apparent stress of 206 ML≥2.0earthquakes from January 2001 to July 2011 based on Brune model.The scaling relations of source parameters turns out that apparent stress increase with the seismic moment,except the earthquakes with ML≤2.8from September 2008 to March2011during which time the apparent stress was low.The temporal and spatial variation of apparent stress shows that the stress level in Shandong province obviously increased from2004 to 2007,and the high value concentrated in Anqu—Changyi,Juxian—Tancheng,Liaocheng—Lankao,and jiaodong peninsula,the stress remained low after 2009 and began to rise from March 2011,which deserves continous concern.
引文
[1]晁洪太,李家灵.郯庐活断层与1668年郯城8.5级地震灾害[J].海洋地质与第四纪地质,1995,15(3):69-80.
[2]周翠英,侯海峰,华爱军,等.山东及其近海区地震序列类型地理分布特征[J].华北地震科学,2001,19(3):15-27.
[3]洪川,窦振亚,刘锋涛.郯庐地震带与日本海沟、琉球群岛地震带之间的地震活动群特征联系[J].海洋地质动态,2008,24(10):1-7.
[4]杨少敏,聂兆生,贾志革,等.GPS解算的日本MW9.0级地震的远场同震地表位移[J].武汉大学学报信息科学版,2011,36(11):1 336-1 339.
[5]张鹏,秦向辉,丰成君,等.郯庐断裂带山东段深孔地应力测量及其现今活动性分析[J].岩土力学,2013,34(8):2329-2335.
[6]季同仁.山东地区地震活动性特征[J].地震研究,1986,9(3):289-298.
[7]吴忠良.由宽频带辐射能量目录和地震矩目录给出的视应力及其地震学意义[J].中国地震,2001,17(1):8-15.
[8]Kanamori H,Heaton T H.Microscopic and macroscopic physics of earthquakes[J].Geo Complexity and the Physics of Earthquakes,2001,147-163.
[9]陈学忠,王小平,王林瑛,等.地震视应力用于震后趋势快速判定的可能性[J].国际地震动态,2003,(7):1-3.
[10]程万正,陈学忠,乔慧珍.四川地震辐射能量和视应力研究[J].地球物理学进展,2006,21(3):692-699.
[11]刘红桂,刘杰,丁页岭,等.地震视应力在云南地震序列中的前兆特征[J].地震学报,2006,28(5):462-471.
[12]刘红桂,王培玲,杨彩霞,等.地震视应力在地震预测中的应用[J].地震学报,2007,29(4):437-445.
[13]秦嘉政,钱晓东.云南地区地震视应力的时间和空间分布研究[J].地震学报,2006,28(3):221-229.
[14]王琼,陈学忠,王林瑛.岫岩地震序列视应力变化及其预测意义[J].地震,2005,25(2):91-97.
[15]孙燕萍,史勇军.新疆两次强震前后地震视应力变化[J].地震地磁观测与研究,2007,28(4):20-28.
[16]易志刚,宋茉,杨选辉,等.地震视应力在中国大陆西部强震趋势预测中的应用[J].地震,2007,27(4):110-120.
[17]郑建常,张永仙,潘元生,等.青岛崂山地区环境应力与视应力变化分析[J].地震,2006,26(3):123-130.
[18]Wyss M.Apparent stresses of earthquakes on ridges compared to apparent sresses of earthquakes in trenches[J].Geophys J R astr Soc,1970,19:479-478.
[19]Brune J N.Tectonic stress and the spectra of seismic waves from earthquakes[J].J Geophys Res,1970,75:4 997-5 009.
[20]陈学忠,李艳娥,郭祥云.河北文安MS5.1地震前震中周围地区小震视应力随时间的变化[J].中国地震,2007,23(4):327-336.
[21]Aki K,Richards P G.Quantitative Seismology,Theory and Methods[M].Freeman&Company San Francisco,California.1980.
[22]Andews D J.Objective deternimation of source parameters and sinilarity of earthquakes of different size[A].In:Das S,Boatwright J and Scholz C H(eds),Earthquake Source Mechanics.Washington[C].D.C.AGU,1986,259-267.
[23]Snoke J A.Stable determination of(Brune)stress drops[J].Bull Seism Soc Am,1987,77(2):530-538.
[24]Archuleta R,Cranswick E,Mueller C,et a1.Source parameters of the 1980Mammoth Lakes,California,earthquakes sequence[J].J Geophys Res,1982,87:4 595-4 607.
[25]Aki K.Scaling law of seismic spectrum[J].J Geophys Res,1967,72(4):1 217-1 231.
[26]Singh S K,Ordaz M.Sesmic energy-releas in mexican subduction zone earthquakes[J].Bull Seism Soc Am,1994,84(5):1 533-1 550.
[27]Choy G L,Boatwright J L.Global patterns of radiated seismic energy and apparent stress[J].J Geophys Res,1995,100(B9):18 205-18 228.
[28]McGarr A.On relating apparent stress to the stress causing earthquake fault slip[J].J Geophys Res,1999,104(B2):3 003-3 011.
[29]Baltay A,et al.Variability in earthquake stress drop and apparent stress[J].Geophys Res Lett,2011,38:L02304.
[30]Abercrombie R E.Earthquake source scaling relationships from-1to 5 MLusing seismograms recorded at 2.5-km depth[J].J Geophys Res,1995,100:24-24.
[31]Mayeda K,Walter W R.Moment,energy,stress drop,and source spectra of western United States earthquakes from regional coda envelopes[J].J Geophys Res,1996,101:11 195-11 208.
[32]Izutani Y,Kanamori H.Scale-dependence of seismic energy-to-moment ratio for strike-slip earthquakes in Japan[J].Geophys Res Lett,2001,28(20):4 007-4 010.
[33]Takahashi T,et al.Scale dependence of apparent stress for earthquakes along the subducting pacific plate in northeastern Honshu,Japan[J].Bull Seism Soc Am,2005,95(4):1 334-1 345.
[34]Mayeda K,et al.Evidence for non-constant energy/moment scaling from coda-derived source spectra[J].Geophys Res Lett,2005,32(10).
[35]盛书中,万永革.地震视应力及其物理意义的探讨[J].地震地磁观测与研究,2008,29(01):36-43.
[36]刘倬,吴忠良,姚雪绒.云南省3次地震的余震活动的折合能量-地震矩关系[J].中国地震,2006,22(04):333-339.
[37]杨志高,张晓东.紫坪铺水库地区蓄水前后视应力标度率变化研究[J].地球物理学报,2010,53(12):2 861-2 868.
[38]李艳娥,陈学忠.1999年11月29日岫岩5.4级地震序列震源参数测定及标度关系分析[J].地震,2007,27(4):59-67.
[39]Wu Z L.Scaling of apparent stress from broadband radiated energy catalogue and seismic moment catalogue and its focal mechanism dependence[J].Earth Planets Space,2001,53(10):943-948.
[40]陈学忠,李艳娥,郭祥云.河北文安MS5.1地震前首都圈及邻区震源动力学参数时空变化特征[J].地震,2011,31(4):15-25.
[41]李艳娥,陈学忠,王恒信.汶川8.0级地震前四川地区地震视应力时空变化特征[J].地震,2012,32(4):113-122
[42]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.
[43]茂木清夫,庄灿涛译.日本地震预报[M].北京:地震出版社,1981,13-20.
[2]周翠英,侯海峰,华爱军,等.山东及其近海区地震序列类型地理分布特征[J].华北地震科学,2001,19(3):15-27.
[3]洪川,窦振亚,刘锋涛.郯庐地震带与日本海沟、琉球群岛地震带之间的地震活动群特征联系[J].海洋地质动态,2008,24(10):1-7.
[4]杨少敏,聂兆生,贾志革,等.GPS解算的日本MW9.0级地震的远场同震地表位移[J].武汉大学学报信息科学版,2011,36(11):1 336-1 339.
[5]张鹏,秦向辉,丰成君,等.郯庐断裂带山东段深孔地应力测量及其现今活动性分析[J].岩土力学,2013,34(8):2329-2335.
[6]季同仁.山东地区地震活动性特征[J].地震研究,1986,9(3):289-298.
[7]吴忠良.由宽频带辐射能量目录和地震矩目录给出的视应力及其地震学意义[J].中国地震,2001,17(1):8-15.
[8]Kanamori H,Heaton T H.Microscopic and macroscopic physics of earthquakes[J].Geo Complexity and the Physics of Earthquakes,2001,147-163.
[9]陈学忠,王小平,王林瑛,等.地震视应力用于震后趋势快速判定的可能性[J].国际地震动态,2003,(7):1-3.
[10]程万正,陈学忠,乔慧珍.四川地震辐射能量和视应力研究[J].地球物理学进展,2006,21(3):692-699.
[11]刘红桂,刘杰,丁页岭,等.地震视应力在云南地震序列中的前兆特征[J].地震学报,2006,28(5):462-471.
[12]刘红桂,王培玲,杨彩霞,等.地震视应力在地震预测中的应用[J].地震学报,2007,29(4):437-445.
[13]秦嘉政,钱晓东.云南地区地震视应力的时间和空间分布研究[J].地震学报,2006,28(3):221-229.
[14]王琼,陈学忠,王林瑛.岫岩地震序列视应力变化及其预测意义[J].地震,2005,25(2):91-97.
[15]孙燕萍,史勇军.新疆两次强震前后地震视应力变化[J].地震地磁观测与研究,2007,28(4):20-28.
[16]易志刚,宋茉,杨选辉,等.地震视应力在中国大陆西部强震趋势预测中的应用[J].地震,2007,27(4):110-120.
[17]郑建常,张永仙,潘元生,等.青岛崂山地区环境应力与视应力变化分析[J].地震,2006,26(3):123-130.
[18]Wyss M.Apparent stresses of earthquakes on ridges compared to apparent sresses of earthquakes in trenches[J].Geophys J R astr Soc,1970,19:479-478.
[19]Brune J N.Tectonic stress and the spectra of seismic waves from earthquakes[J].J Geophys Res,1970,75:4 997-5 009.
[20]陈学忠,李艳娥,郭祥云.河北文安MS5.1地震前震中周围地区小震视应力随时间的变化[J].中国地震,2007,23(4):327-336.
[21]Aki K,Richards P G.Quantitative Seismology,Theory and Methods[M].Freeman&Company San Francisco,California.1980.
[22]Andews D J.Objective deternimation of source parameters and sinilarity of earthquakes of different size[A].In:Das S,Boatwright J and Scholz C H(eds),Earthquake Source Mechanics.Washington[C].D.C.AGU,1986,259-267.
[23]Snoke J A.Stable determination of(Brune)stress drops[J].Bull Seism Soc Am,1987,77(2):530-538.
[24]Archuleta R,Cranswick E,Mueller C,et a1.Source parameters of the 1980Mammoth Lakes,California,earthquakes sequence[J].J Geophys Res,1982,87:4 595-4 607.
[25]Aki K.Scaling law of seismic spectrum[J].J Geophys Res,1967,72(4):1 217-1 231.
[26]Singh S K,Ordaz M.Sesmic energy-releas in mexican subduction zone earthquakes[J].Bull Seism Soc Am,1994,84(5):1 533-1 550.
[27]Choy G L,Boatwright J L.Global patterns of radiated seismic energy and apparent stress[J].J Geophys Res,1995,100(B9):18 205-18 228.
[28]McGarr A.On relating apparent stress to the stress causing earthquake fault slip[J].J Geophys Res,1999,104(B2):3 003-3 011.
[29]Baltay A,et al.Variability in earthquake stress drop and apparent stress[J].Geophys Res Lett,2011,38:L02304.
[30]Abercrombie R E.Earthquake source scaling relationships from-1to 5 MLusing seismograms recorded at 2.5-km depth[J].J Geophys Res,1995,100:24-24.
[31]Mayeda K,Walter W R.Moment,energy,stress drop,and source spectra of western United States earthquakes from regional coda envelopes[J].J Geophys Res,1996,101:11 195-11 208.
[32]Izutani Y,Kanamori H.Scale-dependence of seismic energy-to-moment ratio for strike-slip earthquakes in Japan[J].Geophys Res Lett,2001,28(20):4 007-4 010.
[33]Takahashi T,et al.Scale dependence of apparent stress for earthquakes along the subducting pacific plate in northeastern Honshu,Japan[J].Bull Seism Soc Am,2005,95(4):1 334-1 345.
[34]Mayeda K,et al.Evidence for non-constant energy/moment scaling from coda-derived source spectra[J].Geophys Res Lett,2005,32(10).
[35]盛书中,万永革.地震视应力及其物理意义的探讨[J].地震地磁观测与研究,2008,29(01):36-43.
[36]刘倬,吴忠良,姚雪绒.云南省3次地震的余震活动的折合能量-地震矩关系[J].中国地震,2006,22(04):333-339.
[37]杨志高,张晓东.紫坪铺水库地区蓄水前后视应力标度率变化研究[J].地球物理学报,2010,53(12):2 861-2 868.
[38]李艳娥,陈学忠.1999年11月29日岫岩5.4级地震序列震源参数测定及标度关系分析[J].地震,2007,27(4):59-67.
[39]Wu Z L.Scaling of apparent stress from broadband radiated energy catalogue and seismic moment catalogue and its focal mechanism dependence[J].Earth Planets Space,2001,53(10):943-948.
[40]陈学忠,李艳娥,郭祥云.河北文安MS5.1地震前首都圈及邻区震源动力学参数时空变化特征[J].地震,2011,31(4):15-25.
[41]李艳娥,陈学忠,王恒信.汶川8.0级地震前四川地区地震视应力时空变化特征[J].地震,2012,32(4):113-122
[42]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.
[43]茂木清夫,庄灿涛译.日本地震预报[M].北京:地震出版社,1981,13-20.
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