2010—2016年南北地震带岩石圈磁场变化分析
|
摘要
利用小波分解对2010—2016年南北地震带(21°N—37°N,97°E—109°E)区域6期岩石圈磁场年变化数据进行处理,并对2011年6月以来该区域发生的M_S≥5.0强震震中区的岩石圈磁场变化空间分布及时间演化特征进行了系统分析。结果显示:震级与岩石圈磁场ΔX,ΔY,ΔZ分量变化的相关系数分别为0.26,-0.26,0.15,即二者无显著相关性;震中处岩石圈磁场分量变化的最大幅值分别为18.46,14.98,-15.54 nT。对岩石圈磁场变化进行小波分解的结果表明:MS7.0地震前两年出现显著基底异常,其尺度可能达到上千千米;M_S6.0地震前一年也出现显著基底异常,但异常尺度较小;M_S5.0地震前尚未观测到明确的基底或中层异常。
This paper processed six issues of annual variation data of lithospheric magnetic field from 2010 to 2016 in the North-South Seismic Belt(21°N-37°N,97°E-109°E) by using wavelet decomposition,and systematically analyzed the annual variation of lithospheric magnetic field in epicenters of strong earthquakes(M_S≥5.0) since June of 2011. The results show that correlative coefficients between earthquake magnitude and lithospheric magnetic field components ΔX,ΔY,ΔZ are 0.26,-0.26,0.15,respectively,which means there is no significant correlation between the two parameters;the maximum variation amplitude of lithospheric magnetic field components ΔX,ΔY,ΔZ in the epicenters of strong earthquakes are 18.46,14.98,-15.54 nT,respectively. The wavelet decomposition results show that there is significant variation on basic layers with maximum scale of one thousand kilometers in two years before MS7.0 earthquakes,and significant variation also appears on basic layer in one year before M_S6.0 earthquakes,but the scale is smaller;as to before MS5.0 earthquakes,no significant anomalies have been found on basic layer or middle layer.
This paper processed six issues of annual variation data of lithospheric magnetic field from 2010 to 2016 in the North-South Seismic Belt(21°N-37°N,97°E-109°E) by using wavelet decomposition,and systematically analyzed the annual variation of lithospheric magnetic field in epicenters of strong earthquakes(M_S≥5.0) since June of 2011. The results show that correlative coefficients between earthquake magnitude and lithospheric magnetic field components ΔX,ΔY,ΔZ are 0.26,-0.26,0.15,respectively,which means there is no significant correlation between the two parameters;the maximum variation amplitude of lithospheric magnetic field components ΔX,ΔY,ΔZ in the epicenters of strong earthquakes are 18.46,14.98,-15.54 nT,respectively. The wavelet decomposition results show that there is significant variation on basic layers with maximum scale of one thousand kilometers in two years before MS7.0 earthquakes,and significant variation also appears on basic layer in one year before M_S6.0 earthquakes,but the scale is smaller;as to before MS5.0 earthquakes,no significant anomalies have been found on basic layer or middle layer.
引文
丁新娟,杨福喜,贾路,王粲.2017.2015年新疆皮山6.5级地震前岩石圈磁场局部异常特征分析[J].地震研究,40(3):362-367.Ding X J,Yang F X,Jia L,Wang C.2017.Analysis of local lithospheric magnetic field anomalies characteristics before Xinjiang Pishan MS6.5 earthquake in 2015[J].Journal of Seismological Research,40(3):362-367(in Chinese).
郝锦绮,黄平章,张天中,徐明发,周建国,马醒华.1989.岩石剩余磁化强度的应力效应[J].地震学报,11(4):381-391.Hao J Q,Huang P Z,Zhang T Z,Xu M F,Zhou J G,Ma X H.1989.The stress effect on remanent magnetization of rocks[J].Acta Seismologica Sinica,11(4):381-391(in Chinese).
郝锦绮,黄平章,周建国.1992.岩石流变磁效应:震磁效应的一种可能机理[J].中国地震,8(2):53-60.Hao J Q,Huang P Z,Zhou J G.1992.The effect of rheological property on rock magnetism:A possible mechanism of seismomagnetism[J].Earthquake Research in China,8(2):53-60(in Chinese).
郝锦绮,钱书清,高金田,周建国,朱涛.2003.岩石破裂过程中的超低频电磁异常[J].地震学报,25(1):102-111.Hao J Q,Qian S Q,Gao J T,Zhou J G,Zhu T.2003.ULF electric and magnetic anomalies accompanying the cracking of rock sample[J].Acta Seismologica Sinica,25(1):102-111(in Chinese).
倪喆.2014.洱源5.5级地震前后地磁场变化异常特征分析[J].地震研究,37(3):426-432.Ni Z.2014.Analysis of anomalous characteristics of geomagnetic change before and after Eryuan M5.5 earthquake[J].Journal of Seismological Research,37(3):426-432(in Chinese).
倪喆,陈双贵,袁洁浩,伊炜,王粲.2014a.芦山7.0级地震前后岩石圈磁场异常变化研究[J].地震研究,37(1):61-65.Ni Z,Chen S G,Yuan J H,Yi W,Wang C.2014a.Research on anomalies variation of lithosphere magnetic field before and after Lushan MS7.0 earthquake[J].Journal of Seismological Research,37(1):61-65(in Chinese).
倪喆,袁洁浩,王粲,陈双贵,闫万生.2014b.2014年云南鲁甸6.5级、永善5.0级地震前岩石圈磁场局部异常特征分析[J].地震研究,37(4):537-541.Ni Z,Yuan J H,Wang C,Chen S G,Yan W S.2014b.Analysis of local anomalous characteristics of lithospheric magnetic field before Ludian M6.5 and Yongshan M5.0 earthquakes in Yunnan in 2014[J].Journal of Seismological Research,37(4):537-541(in Chinese).
祁贵仲.1978.“膨胀”磁效应[J].地球物理学报,21(1):18-33.Qi G Z.1978.On the dilatancy-magnetic effect[J].Acta Geophysica Sinica,21(1):18-33(in Chinese).
祁贵仲,侯作中,范国华,詹志佳.1981.地震的感应磁效应(二)[J].地球物理学报,24(3):276-308.Qi G Z,Hou Z Z,Fan G H,Zhan Z J.1981.On the seismo-magnetic induction effect(Ⅱ)[J].Acta Geophysica Sinica,24(3):276-308(in Chinese).
孙延奎.2005.小波分析及其应用[M].北京:机械工业出版社:54-56.Sun Y K.2005.Wavelet Analysis and Application[M].Beijing:China Machine Press:54-56(in Chinese).
王青华,陈政宇,张忠龙,赵育飞,顾健.2017.2014年鲁甸6.5级地震相关断裂的岩石圈磁异常分析[J].地震研究,40(3):377-381.Wang Q H,Chen Z Y,Zhang Z L,Zhao Y F,Gu J.2017.Lithosphere magnetic anomaly analysis of related faults of the 2014Ludian MS6.5 earthquake[J].Journal of Seismological Research,40(3):377-381(in Chinese).
徐梦龙.2016.几种位场数据处理方法的研究及应用[D].长春:吉林大学:4-5.Xu M L.2016.The Research and Application on Several Processing Methods to the Potential-Field Data[D].Changchun:Jilin University:4-5(in Chinese).
杨涛,刘庆生,付媛媛,李西京.2004.震磁效应研究及进展[J].地震地磁观测与研究,25(6):63-71.Yang T,Liu Q S,Fu Y Y,Li X J.2004.Study and development of seismomagnetic effects[J].Seismological and Geomagnetic Observation and Research,25(6):63-71(in Chinese).
杨学立,周树亮,高宝龙,邵攀.2016.小波多尺度分析在重磁勘探位场解释中的应用[J].地球物理学进展,31(6):2707-2716.Yang X L,Zhou S L,Gao B L,Shao P.2016.Application of multi-scale wavelet analysis in gravity data interpretation[J].Progress in Geophysics,31(6):2707-2716(in Chinese).
周稳生,董平,王良书,孙斌.2014.三江盆地重磁场特征与深部结构[J].地球物理学进展,29(6):2620-2627.Zhou W S,Dong P,Wang L S,Sun B.2014.Gravity and magnetic anomalies and deep structure in the Sanjiang basin[J].Progress in Geophysics,29(6):2620-2627(in Chinese).
Audet P,Mareschal J C.2007.Wavelet analysis of the coherence between Bouguer gravity and topography:Application to the elastic thickness anisotropy in the Canadian Shield[J].Geophys J Int,168(1):287-298.
Boukerbout H,Gibert D.2006.Identification of sources of potential fields with the continuous wavelet transform:Two-dimensional ridgelet analysis[J].J Geophys Res,111(B7):B07104.
Büyüksara?A,Jordanova D,Ate?A,Karloukovski V.2005.Interpretation of the gravity and magnetic anomalies of the Cappadocia region,central Turkey[J].Pure Appl Geophys,162(11):2197-2213.
Chambodut A,Panet I,Mandea M,Diament M,Holschneider M,Jamet O.2005.Wavelet frames:An alternative to spherical harmonic representation of potential fields[J].Geophys J Int,163(3):875-899.
Enescu B,Ito K,Struzik Z R.2006.Wavelet-based multiscale resolution analysis of real and simulated time-series of earthquakes[J].Geophys J Int,164(1):63-74.
Fedi M,Cascone L.2011.Composite continuous wavelet transform of potential fields with different choices of analyzing wavelets[J].J Geophys Res,116(B7):B07104.
Hou Z Z,Yang W C.2011.Multi-scale inversion of density structure from gravity anomalies in Tarim basin[J].Science China Earth Science,54(3):399-409.
Kato H,Isezaki N,Park C H,Kim C H,Nakanishi M.2007.Characteristics of crustal magnetic structures in the Tsushima(Ulleung)and Japan basins from vector magnetic anomalies[J].Earth Planets Space,59(7):887-895.
Li C B,Wang L S,Sun B,Wu Y H,Feng R J.2015.Interpretations of gravity and magnetic anomalies in the Songliao basin with wavelet multi-scale decomposition[J].Front Earth Sci,9(3):427-436.
Li Y G,Oldenburg D W.2003.Fast inversion of large-scale magnetic data using wavelet transforms and a logarithmic barrier method[J].Geophys J Int,152(2):251-265.
Sailhac P,Gibert D.2003.Identification of sources of potential fields with the continuous wavelet transform:Two-dimensional wavelets and multipolar approximations[J].J Geophys Res,108(B5):2262.
Singh Y P,Badruddin.2014.Prominent short-,mid-,and long-term periodicities in solar and geomagnetic activity:Wavelet analysis[J].Planet Space Sci,96:120-124.
Stacey F D.1964.The seismomagnetic effect[J].Pure Appl Geophys,58(1):5-22.
Ucan O N,Albora A M,Hisarli Z M.2001.Comments on the gravity and magnetic anomalies of Saros bay using wavelet approach[J].Mar Geophys Res,22(4):251-264.
郝锦绮,黄平章,张天中,徐明发,周建国,马醒华.1989.岩石剩余磁化强度的应力效应[J].地震学报,11(4):381-391.Hao J Q,Huang P Z,Zhang T Z,Xu M F,Zhou J G,Ma X H.1989.The stress effect on remanent magnetization of rocks[J].Acta Seismologica Sinica,11(4):381-391(in Chinese).
郝锦绮,黄平章,周建国.1992.岩石流变磁效应:震磁效应的一种可能机理[J].中国地震,8(2):53-60.Hao J Q,Huang P Z,Zhou J G.1992.The effect of rheological property on rock magnetism:A possible mechanism of seismomagnetism[J].Earthquake Research in China,8(2):53-60(in Chinese).
郝锦绮,钱书清,高金田,周建国,朱涛.2003.岩石破裂过程中的超低频电磁异常[J].地震学报,25(1):102-111.Hao J Q,Qian S Q,Gao J T,Zhou J G,Zhu T.2003.ULF electric and magnetic anomalies accompanying the cracking of rock sample[J].Acta Seismologica Sinica,25(1):102-111(in Chinese).
倪喆.2014.洱源5.5级地震前后地磁场变化异常特征分析[J].地震研究,37(3):426-432.Ni Z.2014.Analysis of anomalous characteristics of geomagnetic change before and after Eryuan M5.5 earthquake[J].Journal of Seismological Research,37(3):426-432(in Chinese).
倪喆,陈双贵,袁洁浩,伊炜,王粲.2014a.芦山7.0级地震前后岩石圈磁场异常变化研究[J].地震研究,37(1):61-65.Ni Z,Chen S G,Yuan J H,Yi W,Wang C.2014a.Research on anomalies variation of lithosphere magnetic field before and after Lushan MS7.0 earthquake[J].Journal of Seismological Research,37(1):61-65(in Chinese).
倪喆,袁洁浩,王粲,陈双贵,闫万生.2014b.2014年云南鲁甸6.5级、永善5.0级地震前岩石圈磁场局部异常特征分析[J].地震研究,37(4):537-541.Ni Z,Yuan J H,Wang C,Chen S G,Yan W S.2014b.Analysis of local anomalous characteristics of lithospheric magnetic field before Ludian M6.5 and Yongshan M5.0 earthquakes in Yunnan in 2014[J].Journal of Seismological Research,37(4):537-541(in Chinese).
祁贵仲.1978.“膨胀”磁效应[J].地球物理学报,21(1):18-33.Qi G Z.1978.On the dilatancy-magnetic effect[J].Acta Geophysica Sinica,21(1):18-33(in Chinese).
祁贵仲,侯作中,范国华,詹志佳.1981.地震的感应磁效应(二)[J].地球物理学报,24(3):276-308.Qi G Z,Hou Z Z,Fan G H,Zhan Z J.1981.On the seismo-magnetic induction effect(Ⅱ)[J].Acta Geophysica Sinica,24(3):276-308(in Chinese).
孙延奎.2005.小波分析及其应用[M].北京:机械工业出版社:54-56.Sun Y K.2005.Wavelet Analysis and Application[M].Beijing:China Machine Press:54-56(in Chinese).
王青华,陈政宇,张忠龙,赵育飞,顾健.2017.2014年鲁甸6.5级地震相关断裂的岩石圈磁异常分析[J].地震研究,40(3):377-381.Wang Q H,Chen Z Y,Zhang Z L,Zhao Y F,Gu J.2017.Lithosphere magnetic anomaly analysis of related faults of the 2014Ludian MS6.5 earthquake[J].Journal of Seismological Research,40(3):377-381(in Chinese).
徐梦龙.2016.几种位场数据处理方法的研究及应用[D].长春:吉林大学:4-5.Xu M L.2016.The Research and Application on Several Processing Methods to the Potential-Field Data[D].Changchun:Jilin University:4-5(in Chinese).
杨涛,刘庆生,付媛媛,李西京.2004.震磁效应研究及进展[J].地震地磁观测与研究,25(6):63-71.Yang T,Liu Q S,Fu Y Y,Li X J.2004.Study and development of seismomagnetic effects[J].Seismological and Geomagnetic Observation and Research,25(6):63-71(in Chinese).
杨学立,周树亮,高宝龙,邵攀.2016.小波多尺度分析在重磁勘探位场解释中的应用[J].地球物理学进展,31(6):2707-2716.Yang X L,Zhou S L,Gao B L,Shao P.2016.Application of multi-scale wavelet analysis in gravity data interpretation[J].Progress in Geophysics,31(6):2707-2716(in Chinese).
周稳生,董平,王良书,孙斌.2014.三江盆地重磁场特征与深部结构[J].地球物理学进展,29(6):2620-2627.Zhou W S,Dong P,Wang L S,Sun B.2014.Gravity and magnetic anomalies and deep structure in the Sanjiang basin[J].Progress in Geophysics,29(6):2620-2627(in Chinese).
Audet P,Mareschal J C.2007.Wavelet analysis of the coherence between Bouguer gravity and topography:Application to the elastic thickness anisotropy in the Canadian Shield[J].Geophys J Int,168(1):287-298.
Boukerbout H,Gibert D.2006.Identification of sources of potential fields with the continuous wavelet transform:Two-dimensional ridgelet analysis[J].J Geophys Res,111(B7):B07104.
Büyüksara?A,Jordanova D,Ate?A,Karloukovski V.2005.Interpretation of the gravity and magnetic anomalies of the Cappadocia region,central Turkey[J].Pure Appl Geophys,162(11):2197-2213.
Chambodut A,Panet I,Mandea M,Diament M,Holschneider M,Jamet O.2005.Wavelet frames:An alternative to spherical harmonic representation of potential fields[J].Geophys J Int,163(3):875-899.
Enescu B,Ito K,Struzik Z R.2006.Wavelet-based multiscale resolution analysis of real and simulated time-series of earthquakes[J].Geophys J Int,164(1):63-74.
Fedi M,Cascone L.2011.Composite continuous wavelet transform of potential fields with different choices of analyzing wavelets[J].J Geophys Res,116(B7):B07104.
Hou Z Z,Yang W C.2011.Multi-scale inversion of density structure from gravity anomalies in Tarim basin[J].Science China Earth Science,54(3):399-409.
Kato H,Isezaki N,Park C H,Kim C H,Nakanishi M.2007.Characteristics of crustal magnetic structures in the Tsushima(Ulleung)and Japan basins from vector magnetic anomalies[J].Earth Planets Space,59(7):887-895.
Li C B,Wang L S,Sun B,Wu Y H,Feng R J.2015.Interpretations of gravity and magnetic anomalies in the Songliao basin with wavelet multi-scale decomposition[J].Front Earth Sci,9(3):427-436.
Li Y G,Oldenburg D W.2003.Fast inversion of large-scale magnetic data using wavelet transforms and a logarithmic barrier method[J].Geophys J Int,152(2):251-265.
Sailhac P,Gibert D.2003.Identification of sources of potential fields with the continuous wavelet transform:Two-dimensional wavelets and multipolar approximations[J].J Geophys Res,108(B5):2262.
Singh Y P,Badruddin.2014.Prominent short-,mid-,and long-term periodicities in solar and geomagnetic activity:Wavelet analysis[J].Planet Space Sci,96:120-124.
Stacey F D.1964.The seismomagnetic effect[J].Pure Appl Geophys,58(1):5-22.
Ucan O N,Albora A M,Hisarli Z M.2001.Comments on the gravity and magnetic anomalies of Saros bay using wavelet approach[J].Mar Geophys Res,22(4):251-264.