2003年8月16日内蒙古M_S5.9地震震害分布特征及其成因分析
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摘要
总结了根据应急科考震害调查资料确定的2003 年8 月16 日内蒙古MS5.9 地震的震害分布特征, 利用中国数字地震台网(CDSN)的长周期波形资料, 反演确定了该地震的地震矩张量解和震源机制解. 根据震源机制解、余震分布和震害分布特征, 探讨了震害分布特点与震源机制的关系. 从全球强震记录、历史地震资料和该地震的震害特点, 讨论了强地面运动的特点与震中区物理背景的关系. 调查表明, 此次地震的极震区呈东西走向, 与震源机制反演结果得到的断层走向一致. 极震区面积相对较大, 单层土木结构和砖木结构的房屋受损较严重, 可能与当地的震源物理环境有一定关系.
The spatial damage distribution of August 16, 2003, Inner Mongolia, China, M S=5.9 earthquake is summarized through field investigation. The moment tensor solution and focal mechanism are inverted using the digital long period waveform records of China Digital Seismograph Network (CDSN). The relation between the spatial damage distribution and focal mechanism is analyzed according to the focal mechanism, the aftershock distribution and the spatial damage distribution. The possible relation between the characteristics of ground motion and the tectonic background of the source region is discussed in terms of the global ground motion records, historical earthquake documents and the damage distribution. Investigation reveals that the meizoseismal region is in east west direction, which is consistent with the nodal plane of focal mechanism inversion. The meizoseismal area is relatively large and the damage of single story adobe houses or masonry houses is more severe. This may have relations with local seismotectonic environment.
The spatial damage distribution of August 16, 2003, Inner Mongolia, China, M S=5.9 earthquake is summarized through field investigation. The moment tensor solution and focal mechanism are inverted using the digital long period waveform records of China Digital Seismograph Network (CDSN). The relation between the spatial damage distribution and focal mechanism is analyzed according to the focal mechanism, the aftershock distribution and the spatial damage distribution. The possible relation between the characteristics of ground motion and the tectonic background of the source region is discussed in terms of the global ground motion records, historical earthquake documents and the damage distribution. Investigation reveals that the meizoseismal region is in east west direction, which is consistent with the nodal plane of focal mechanism inversion. The meizoseismal area is relatively large and the damage of single story adobe houses or masonry houses is more severe. This may have relations with local seismotectonic environment.
引文
陈运泰,吴忠良,王培德,等.2000.数字地震学[M].北京:地震出版社,1~171
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ArchuletaR J,HartzellS H.1981.Effects on fault finiteness on near source ground motion[J].BullSeismSocAmer,71:939~957
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SomervilleO G,SmithN F,GravesR W, et al.1997.Modification of empirical strong ground motion attenuation rela tions to include the amplitude and duration effects of rupture directivity[J].SeismResLett,68:199~222
SondergeldC H,EsteyL H.1981.Acoustic emission study during the cyclic loading ofWesterly granite[J].J GeophysRes,86:2915~2924
SpudichP,JoynerW B,LindhA G, et al.1999.SEA99:A revised ground motion prediction relation for use in exten sional tectonic regimes[J].BullSeismSocAmer,89:1156~1170
TsaiY B,HuangM W.2000.Strong ground motion characteristics of theChiChi,Taiwan earthquake ofSeptember21,1999[J].EarthqEngin andEnginSeism,2:1~21
WangSuyun,GaoAjia,YanXiujie.2000.Development of attenuation relations for ground motion inChina[J].JournalofEarthquakePredictionResearch,8(1):32~40
ZhaoShuqing.1986.Frequency spectra characteristics of acoustic emission signals during fracturing of rock specimen anda discussion of earthquake prediction[A].In:PuGuangzhi ed.Advances inScience ofChinaEarthScience[C].Beijing:SciencePress,19~34
刘力强,马胜利,马瑾,等.2001.不同结构岩石标本声发射 b值和频谱的时间扫描及其物理意义[J].地震地质23(4):481~492
许力生,陈运泰.1997.用数字化宽频带波形资料反演共和地震的震源参数[J].地震学报,19(2):113~128
许力生,陈运泰,高孟潭.2002.2001年1月26日印度古杰拉特(Gujarat)MS7.8地震时空破裂过程[J].地震学报,24(5):447~461
中华人民共和国国家标准.1999.中国地震烈度表,GB/T177421999[M].北京:中国标准出版社,3
AkiK,RichardsP G.1980.QuantitativeSeismology:Theory andMethods.Vols.1,2[M].SanFrancisco:Freeman,1~932.
中译本:安艺敬一,理查兹.1986.定量地震学(一),(二)[M].北京:地震出版社,1~1027
AndersonJ G,BodinP,BruneJ, et al.1986.Strong ground motion and source mechanism of theMexico earthquake ofSeptember19,1985[J].Science,233:1043~1049
AndersonJ G,BruneJ N,AnooshehpoorR, et al.2000.New ground motion data and concepts in seismic hazard analysis[J].CurrentScience,79:1278~1290
ArchuletaR J,HartzellS H.1981.Effects on fault finiteness on near source ground motion[J].BullSeismSocAmer,71:939~957
KennettB L N.1983.SeismicWavePropagation inStratifiedMedia[M].Cambridge:CambridgeUniversityPress,1~339
KennettB L N,EngdahlE R.1991.Travel times for global earthquake location and phase identification[J].GeophysJInt,105:429~465
LayT,WallaceT C.1995.ModernGlobalSeismology[M].SanDiego:AcademicPress,1~521
LucoJ E,AndersonJ G.1983.Steady state response of an elastic half space to a moving dislocation of finite fault[J].BullSeismSocAmer,73:1~22
SomervilleO G,SmithN F,GravesR W, et al.1997.Modification of empirical strong ground motion attenuation rela tions to include the amplitude and duration effects of rupture directivity[J].SeismResLett,68:199~222
SondergeldC H,EsteyL H.1981.Acoustic emission study during the cyclic loading ofWesterly granite[J].J GeophysRes,86:2915~2924
SpudichP,JoynerW B,LindhA G, et al.1999.SEA99:A revised ground motion prediction relation for use in exten sional tectonic regimes[J].BullSeismSocAmer,89:1156~1170
TsaiY B,HuangM W.2000.Strong ground motion characteristics of theChiChi,Taiwan earthquake ofSeptember21,1999[J].EarthqEngin andEnginSeism,2:1~21
WangSuyun,GaoAjia,YanXiujie.2000.Development of attenuation relations for ground motion inChina[J].JournalofEarthquakePredictionResearch,8(1):32~40
ZhaoShuqing.1986.Frequency spectra characteristics of acoustic emission signals during fracturing of rock specimen anda discussion of earthquake prediction[A].In:PuGuangzhi ed.Advances inScience ofChinaEarthScience[C].Beijing:SciencePress,19~34
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