全球大震活动特征
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摘要
分析了全球、环太平洋地震带(P系)和低纬度环球剪切带(E系)的地震活动特征,并运用小波变换技术对地震活动周期成分进行了定量研究,结果表明:(1)全球地震活动存在45.5a和32.0a的显著周期成分,P系为45.5a,E系为30.9a和47.5a;(2)全球及两大构造系7.0级以上地震频度均显示30.0a左右的周期特征,但地震频度与全球8.5级以上特大地震活动是不同步的,不能作为判定地震活跃期与平静期的依据,频度变化可能反映全球尺度的某种活动对地震产生的影响;(3)全球地震具有50.0a尺度的活跃期与平静期;当前全球地震活动处于2004年开始的以8.5级以上地震活动为特点的大释放阶段,这种状态还将持续数年;E系处于Mw≥7.8大震活跃期的尾声,而2010年智利Mw=8.8地震可能标志着P系开始进入大释放阶段.
Using the global earthquake catalogue with Mw≥7.0 since 1900,we analyze the characteristics of great earthquakes in the global area,the circum-Pacific seismic belt(namely P-system)and the low-latitude circum-earth zone(namely E-systerm) respectively.In addition,the technique of Morlet wavelet transform is applied to quantitatively analyze the seismicity periodicities.Results show:(1) there are two principal periodic components,including 45.5 a and 32.0 a,in the global seismicity.For the P-system,the principal period is 45.5 a.The principal periodic components are 30.9 a and 47.5 a in the seismicity of the E-system;(2) The earthquake frequency with Mw≥7.0 of the globe,the P-system and the E-system show a prominent period of about 30 a.However,the temporal process of earthquake frequency is not synchronous with the global seismicity of Mw≥8.5,so it is not properly distinguish the active or quiet period by frequency and the variation of earthquake frequency may be a reaction that some global activity influence on the global seismicity;(3) The global great earthquakes showing the seismicity period is about 50.0 a(including an active and a quiet period).Great earthquakes(Mw≥8.5) in globe occurred frequently since 2004,showing a high actively trend based on the characteristics of great earthquakes cyclic process.It has been in high active period with many large earthquakes(Mw≥7.8) in the E-system since 1992,and currently it is in the end of the active period.The 2010 Chile Mw=8.8 event may be the sign that it begins a new active period in the P-system.
Using the global earthquake catalogue with Mw≥7.0 since 1900,we analyze the characteristics of great earthquakes in the global area,the circum-Pacific seismic belt(namely P-system)and the low-latitude circum-earth zone(namely E-systerm) respectively.In addition,the technique of Morlet wavelet transform is applied to quantitatively analyze the seismicity periodicities.Results show:(1) there are two principal periodic components,including 45.5 a and 32.0 a,in the global seismicity.For the P-system,the principal period is 45.5 a.The principal periodic components are 30.9 a and 47.5 a in the seismicity of the E-system;(2) The earthquake frequency with Mw≥7.0 of the globe,the P-system and the E-system show a prominent period of about 30 a.However,the temporal process of earthquake frequency is not synchronous with the global seismicity of Mw≥8.5,so it is not properly distinguish the active or quiet period by frequency and the variation of earthquake frequency may be a reaction that some global activity influence on the global seismicity;(3) The global great earthquakes showing the seismicity period is about 50.0 a(including an active and a quiet period).Great earthquakes(Mw≥8.5) in globe occurred frequently since 2004,showing a high actively trend based on the characteristics of great earthquakes cyclic process.It has been in high active period with many large earthquakes(Mw≥7.8) in the E-system since 1992,and currently it is in the end of the active period.The 2010 Chile Mw=8.8 event may be the sign that it begins a new active period in the P-system.
引文
Bai,C.H.,Xu,W.Y.,2010.Multi-decadal to centennial secular variation of the main geomagnetic field.ChineseJournal of Geophysics,53(4):904-911(in Chinesewith English abstract).doi:10.3969/j.issn.00015733.2010.04.015
Bercovici,D.,1995.On the purpose of toroidal motion in a convecting mantle.Geophys.Res.Lett.,22:3107-3110.
Ding,N.,Guan,L.X.,Wen,C.B.,2005.Study on fault signal ofcompressor with Morlet wavelet.Electrical Automation,28(4):7-10(in Chinese with English abstract).
Du,P.R.,Ma,Z.J.,Gao,X.L.,2010.An analysis on episodes ofgreat earthquakes in the low-latitude circum-earth zone andcircum Pacific zone.Chinese Journal of Geophysics,53(12):2869-2874.doi:10.3969/j.issn.0001-5733.2010.12.010
Engdahl,E.R.,Villaseor,A.,2002.Global Seismicity:19001999.In:Lee,W.H.K.,Kanamori,H.,Jennings,P.C.,eds.,International handbook of earth-quake and engineeringseismology.Academic Press,San Diego,Part A:665-690.
Fan,H.S.,2001.A preliminary analysis of global seismicitysince1900.Recent Development in World Seismology,(2):12-17(in Chinese with English abstract).
Fedotov,S.A.,1965.On distribution patterns for strongearthquakes in Kamchatka,the Kurile Islands andnortheastern Japan.Trudy Inst Fiz Zemli Akad,NaukSSSR,36:66-93.
Fedotov,S.A.,1968.The seismic cycle,quantitative seismiczoning,and long-term seismic forecasting.In:MedvedevS,V.,ed.,Seismic zoning in the USSR.IzdatelstvoNauka,Moscow,133-166.
He,L.S.,Li,W.H.,2002.Morlet wavelet and its application in enveloping.Journal of Vibration Engineering,15(1):119-122(in Chinese with English abstract).
Kananmori,H.,1977.The energy release in great earthquakes.J.Geophys.Res.,82:2981-2987.doi:10.1029/JB082i020p02981
Lin,Z.S.,Deng,Z.W.,1999.Study on diagnosis technology ofwavelet climate.Seismological Press,Beijing(in Chinese).
Ma,H.S.,Zhou,L.Q.,Shao,Z.G.,et al.,2010.Processand trend of large earthquakes on the earth and in theChina continent and its surroundings.Earthquake,30(2):29-37(in Chinese with English abstract).
Ma,Z.J.,Jiang,M.,1987.Strong earthquake period and episodesin China.Earthquake Research in China,3(1):47-51.
Ma,Z.J.,Du,P.R.,Ren,J.W.,et al.,2006.Eposodes ofgreat earthquakes in the low-latitude circum-earth zoneand circum Pacitic zone.Science in China(Ser.D),36(4):326-331(in Chinese with English abstract).
Mallat,S.,1991.Zero-crossings of a wavelet transform.IEEETransaction on Information Theory,37(4):1019-1033.
Mei,S.R.,1960.Seismic activity in China.Acta Geophysica Sinica,9(1):1-19(in Chinese with English abstract).
Mogi,K.,1974.Active periods in the worlds chief seismicbelts.Tectonophysics,22:265-282.
Mogi,K.,1979.Global variation of seismic activity.Tectonophysics,57:43-50.
Torrenee,C.,Compo,G.P.,1998.A practical guide to wavelet analysis.Bull Amer.Meteor Soc.,79(1):61-78.
Wells,D.L.,Coppersmith,K.J.,1994.New empirical relationships among magnitude,rupture length,rupturewidth,rupture area,and surface displacement.Bull.Geol.Soc.Am.,84(4):974-1002.
Xu,D.Y.,Zheng,W.Z.,An,Z.S.,1980.Heavenly spheresand earthquake prediction.Seismological Press,Beijing(in Chinese).
Yin,J.Y.,Zhu,Y.Q.,Song,Z.P.,2011.Significance testand precision analysis of Morlet wavelet:application tostudying periodic variation of earthquake activity andgeomagnetic field.Acta Seismologica Sinica,33(5):663-671(in Chinese with English abstract).
Yu,Y.,Hong,H.J.,Liu,P.X.,et al.,2003.Spatiotemporaldistribution of global great earthquakes and dynamicmechanism.Earth Science Frontiers,10(Special):5-10(in Chinese with English abstract).
白春华,徐文耀,2010.主磁场长期变化十年至百年尺度的周期.地球物理学报,53(4):904-911.
丁娜,关立行,文常保,2005.Morlet小波对于压缩机故障信号的研究.电气自动化,28(4):7-10.
杜品仁,马宗晋,高祥林,2010.低纬度环球带和环太平洋带大地震的幕式活动分析,地球物理学报,53(12):2869-2874.
范洪顺,2001.1900年以来全球地震活动的初步分析.国际地震动态,(2):12-17.
何岭松,李巍华,2002.用Morlet小波进行包络检波分析.振动工程学报,15(1):119-122.
林振山,邓自旺,1999.子波气候诊断技术的研究.北京:气象出版社.
马宏生,周龙泉,邵志刚,等,2010.全球及中国大陆周边强震活动状态研究.地震,30(2):29-37.
马宗晋,杜品仁,任金卫,等,2006.低纬度环球剪切带及其与环太平洋带大地震的幕式活动.中国科学(D辑),36(4):326-331.
梅世蓉,1960.中国的地震活动性.地球物理学报,9(1):1-19.
徐道一,郑文振,安振声,1980.天体运行与地震预报.北京:地震出版社.
尹继尧,朱元清,宋治平,等,2011.Morlet小波显著性检验和精度分析在地磁场和地震活动性周期分析中的应用.地震学报,33(5):663-671.
于泳,洪汉净,刘培洵,等,2003.全球大地震时空分布与动力学机制的初步研究.地学前缘(特刊),10:5-10.
Bercovici,D.,1995.On the purpose of toroidal motion in a convecting mantle.Geophys.Res.Lett.,22:3107-3110.
Ding,N.,Guan,L.X.,Wen,C.B.,2005.Study on fault signal ofcompressor with Morlet wavelet.Electrical Automation,28(4):7-10(in Chinese with English abstract).
Du,P.R.,Ma,Z.J.,Gao,X.L.,2010.An analysis on episodes ofgreat earthquakes in the low-latitude circum-earth zone andcircum Pacific zone.Chinese Journal of Geophysics,53(12):2869-2874.doi:10.3969/j.issn.0001-5733.2010.12.010
Engdahl,E.R.,Villaseor,A.,2002.Global Seismicity:19001999.In:Lee,W.H.K.,Kanamori,H.,Jennings,P.C.,eds.,International handbook of earth-quake and engineeringseismology.Academic Press,San Diego,Part A:665-690.
Fan,H.S.,2001.A preliminary analysis of global seismicitysince1900.Recent Development in World Seismology,(2):12-17(in Chinese with English abstract).
Fedotov,S.A.,1965.On distribution patterns for strongearthquakes in Kamchatka,the Kurile Islands andnortheastern Japan.Trudy Inst Fiz Zemli Akad,NaukSSSR,36:66-93.
Fedotov,S.A.,1968.The seismic cycle,quantitative seismiczoning,and long-term seismic forecasting.In:MedvedevS,V.,ed.,Seismic zoning in the USSR.IzdatelstvoNauka,Moscow,133-166.
He,L.S.,Li,W.H.,2002.Morlet wavelet and its application in enveloping.Journal of Vibration Engineering,15(1):119-122(in Chinese with English abstract).
Kananmori,H.,1977.The energy release in great earthquakes.J.Geophys.Res.,82:2981-2987.doi:10.1029/JB082i020p02981
Lin,Z.S.,Deng,Z.W.,1999.Study on diagnosis technology ofwavelet climate.Seismological Press,Beijing(in Chinese).
Ma,H.S.,Zhou,L.Q.,Shao,Z.G.,et al.,2010.Processand trend of large earthquakes on the earth and in theChina continent and its surroundings.Earthquake,30(2):29-37(in Chinese with English abstract).
Ma,Z.J.,Jiang,M.,1987.Strong earthquake period and episodesin China.Earthquake Research in China,3(1):47-51.
Ma,Z.J.,Du,P.R.,Ren,J.W.,et al.,2006.Eposodes ofgreat earthquakes in the low-latitude circum-earth zoneand circum Pacitic zone.Science in China(Ser.D),36(4):326-331(in Chinese with English abstract).
Mallat,S.,1991.Zero-crossings of a wavelet transform.IEEETransaction on Information Theory,37(4):1019-1033.
Mei,S.R.,1960.Seismic activity in China.Acta Geophysica Sinica,9(1):1-19(in Chinese with English abstract).
Mogi,K.,1974.Active periods in the worlds chief seismicbelts.Tectonophysics,22:265-282.
Mogi,K.,1979.Global variation of seismic activity.Tectonophysics,57:43-50.
Torrenee,C.,Compo,G.P.,1998.A practical guide to wavelet analysis.Bull Amer.Meteor Soc.,79(1):61-78.
Wells,D.L.,Coppersmith,K.J.,1994.New empirical relationships among magnitude,rupture length,rupturewidth,rupture area,and surface displacement.Bull.Geol.Soc.Am.,84(4):974-1002.
Xu,D.Y.,Zheng,W.Z.,An,Z.S.,1980.Heavenly spheresand earthquake prediction.Seismological Press,Beijing(in Chinese).
Yin,J.Y.,Zhu,Y.Q.,Song,Z.P.,2011.Significance testand precision analysis of Morlet wavelet:application tostudying periodic variation of earthquake activity andgeomagnetic field.Acta Seismologica Sinica,33(5):663-671(in Chinese with English abstract).
Yu,Y.,Hong,H.J.,Liu,P.X.,et al.,2003.Spatiotemporaldistribution of global great earthquakes and dynamicmechanism.Earth Science Frontiers,10(Special):5-10(in Chinese with English abstract).
白春华,徐文耀,2010.主磁场长期变化十年至百年尺度的周期.地球物理学报,53(4):904-911.
丁娜,关立行,文常保,2005.Morlet小波对于压缩机故障信号的研究.电气自动化,28(4):7-10.
杜品仁,马宗晋,高祥林,2010.低纬度环球带和环太平洋带大地震的幕式活动分析,地球物理学报,53(12):2869-2874.
范洪顺,2001.1900年以来全球地震活动的初步分析.国际地震动态,(2):12-17.
何岭松,李巍华,2002.用Morlet小波进行包络检波分析.振动工程学报,15(1):119-122.
林振山,邓自旺,1999.子波气候诊断技术的研究.北京:气象出版社.
马宏生,周龙泉,邵志刚,等,2010.全球及中国大陆周边强震活动状态研究.地震,30(2):29-37.
马宗晋,杜品仁,任金卫,等,2006.低纬度环球剪切带及其与环太平洋带大地震的幕式活动.中国科学(D辑),36(4):326-331.
梅世蓉,1960.中国的地震活动性.地球物理学报,9(1):1-19.
徐道一,郑文振,安振声,1980.天体运行与地震预报.北京:地震出版社.
尹继尧,朱元清,宋治平,等,2011.Morlet小波显著性检验和精度分析在地磁场和地震活动性周期分析中的应用.地震学报,33(5):663-671.
于泳,洪汉净,刘培洵,等,2003.全球大地震时空分布与动力学机制的初步研究.地学前缘(特刊),10:5-10.
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