极化方法在分析地磁秒数据异常信息中的应用
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摘要
采用极化分析方法处理地磁秒数据。对不同台站地磁秒数据进行分析发现,极化值在地震发生前约2个月内有明显异常,且在傅里叶频谱上表现不太明显。另外,不同地磁分量的极化值映震效果不同,大部分震例极化值升高、振幅增大,小部分震例极化值低值、平稳。研究认为,该方法可以用于地磁秒数据震磁异常信息提取。
Polarization analysis on geomagnetic second data is used in this paper.After analyzing different seismic data from different stations,changes are evident in polarization value about two months before the earthquake which are not in the Fourier spectrum.In addition,the abilities in reflecting earthquake of different ratios are varied.Most cases have a distinctive rise both in polarization value and the amplitude,some others show a decrease in polarization value and smooth in the fluctuation.This study suggests that the method can be used to extract anomalies from geomagnetic second data.
Polarization analysis on geomagnetic second data is used in this paper.After analyzing different seismic data from different stations,changes are evident in polarization value about two months before the earthquake which are not in the Fourier spectrum.In addition,the abilities in reflecting earthquake of different ratios are varied.Most cases have a distinctive rise both in polarization value and the amplitude,some others show a decrease in polarization value and smooth in the fluctuation.This study suggests that the method can be used to extract anomalies from geomagnetic second data.
引文
丁跃军,陈化然,张建国.汶川8.0级地震前电磁辐射异常变化特征初步研究[J].地震地磁观测与研究,2009,30(3):11-15.
李琪,李军辉,杨冬梅。等.地磁ULF前兆信息研究简述[J].地震地磁观测与研究,2008,29(6):170-176.
肖武军,关华平.地震“ULF”电磁扰动接收原理及异常特征[J].地震地磁观测与研究,2006,27(5):52-57.
张建国,焦立果。刘晓灿,等.汶川M_S 8.0级地震前后ULF电磁辐射频谱特征研究[J].地球物理学报,2013,56(4):1253-1 261.
张建国,姚丽,刘晓灿,等.地震电离层VLF电磁场频谱特征研究[J].大地测量与地球动力学,2012,32(3):110-115.
张颖.电磁辐射与地震关系的研究[J].地震地磁观测与研究,2006,27(2):39-42.
Gugliclmi A,Hayakawa M,Potapov A et al.Polarization method to detect the co-seismic magnetic oscillations[J].Physics and Chemistry of the Earth,2006,31:299—304.
Hayakawa M,Kawate R,Oleg A.Molchanolv et al.Resultsof ultra-low-frequencymagneticfield measurements during the Guam earthquake of 8 August 1993[J].Geophysical Research Letters,1996,23(3):241—244.
Hobara Y,Koons b H C,Roeder J L et al.Characteristics of ULF magnetic anomaly before earthquakes[J].Physics and Chemistr y of the Earth,2004,29:437—444.
Ida Y,Hayakawa M,Adalev A et al.Multifractal analysis for the ULF geomagnetic data during the 1993 Guam earthquake[J].Nonlinear Processesin Geophysics,2005,12:157—162.
Kopytenko Y A,Matiashvili T G,Voronov P M et al.Detection of ultra-low-frequency emissions connected with Spitak earthquake and itsaftershock activity,based on geomagnetic pulsations data at Dusheti andVardzia observatories[J].Physics of the Earth and Planetary Interiors,1993,77:85—95.
Masashi Hayakawa,Katsumi Hattori,Kenji Ohta.Monitoring of ULF(ultra-low-frequency)Geomagnetic Variations Associated with Earthquakes[J].Sensors,2007,7:1 108—1 122.
Prattes G,Schwingenschuh K,Eichelberger H U et al.Multi-point ground-based ULF magnetic field observations in Europe during seismic active periods in 2004 and 2005[J].Natural Hazardsand Earth System Sciences,2008,8:501—507.
Serital A,Hattori K,Yoshino C et al.Principal component analysis and singular spectrum analysis of ULF geomagnetic data associated with earthquakes[J].Natural Hazardsand Earth System Sciences,2005,5:685—689.
Surkov V V,Molchanov O A,Hayakawa M.A direction finding technique for the ULF electromagnetic source[J].Natural Hazardsand Earth System Sciences,2004,4:513—517.
Vinod Kushwah,Vikram Singh,Birbal Singh et al.Ultralow frequency(ULF)magnetic field anomalies observed at Agra and their relation to moderateseismic activities in Indian region[J].Journal of Atmospheric and Solar-Terrestrial Physics,2005,67:992-1 001.
李琪,李军辉,杨冬梅。等.地磁ULF前兆信息研究简述[J].地震地磁观测与研究,2008,29(6):170-176.
肖武军,关华平.地震“ULF”电磁扰动接收原理及异常特征[J].地震地磁观测与研究,2006,27(5):52-57.
张建国,焦立果。刘晓灿,等.汶川M_S 8.0级地震前后ULF电磁辐射频谱特征研究[J].地球物理学报,2013,56(4):1253-1 261.
张建国,姚丽,刘晓灿,等.地震电离层VLF电磁场频谱特征研究[J].大地测量与地球动力学,2012,32(3):110-115.
张颖.电磁辐射与地震关系的研究[J].地震地磁观测与研究,2006,27(2):39-42.
Gugliclmi A,Hayakawa M,Potapov A et al.Polarization method to detect the co-seismic magnetic oscillations[J].Physics and Chemistry of the Earth,2006,31:299—304.
Hayakawa M,Kawate R,Oleg A.Molchanolv et al.Resultsof ultra-low-frequencymagneticfield measurements during the Guam earthquake of 8 August 1993[J].Geophysical Research Letters,1996,23(3):241—244.
Hobara Y,Koons b H C,Roeder J L et al.Characteristics of ULF magnetic anomaly before earthquakes[J].Physics and Chemistr y of the Earth,2004,29:437—444.
Ida Y,Hayakawa M,Adalev A et al.Multifractal analysis for the ULF geomagnetic data during the 1993 Guam earthquake[J].Nonlinear Processesin Geophysics,2005,12:157—162.
Kopytenko Y A,Matiashvili T G,Voronov P M et al.Detection of ultra-low-frequency emissions connected with Spitak earthquake and itsaftershock activity,based on geomagnetic pulsations data at Dusheti andVardzia observatories[J].Physics of the Earth and Planetary Interiors,1993,77:85—95.
Masashi Hayakawa,Katsumi Hattori,Kenji Ohta.Monitoring of ULF(ultra-low-frequency)Geomagnetic Variations Associated with Earthquakes[J].Sensors,2007,7:1 108—1 122.
Prattes G,Schwingenschuh K,Eichelberger H U et al.Multi-point ground-based ULF magnetic field observations in Europe during seismic active periods in 2004 and 2005[J].Natural Hazardsand Earth System Sciences,2008,8:501—507.
Serital A,Hattori K,Yoshino C et al.Principal component analysis and singular spectrum analysis of ULF geomagnetic data associated with earthquakes[J].Natural Hazardsand Earth System Sciences,2005,5:685—689.
Surkov V V,Molchanov O A,Hayakawa M.A direction finding technique for the ULF electromagnetic source[J].Natural Hazardsand Earth System Sciences,2004,4:513—517.
Vinod Kushwah,Vikram Singh,Birbal Singh et al.Ultralow frequency(ULF)magnetic field anomalies observed at Agra and their relation to moderateseismic activities in Indian region[J].Journal of Atmospheric and Solar-Terrestrial Physics,2005,67:992-1 001.
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