Spatial Correlation Anomalies of the Diurnal Variation of the Geomagnetic Vertical Component before the Yingjiang M_S6.1 and Ludian M_S6.5 Earthquakes
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摘要
Significant anomalies were observed at the geomagnetic stations in the southwest region of China before the Yingjiang M_S6. 1 earthquake and the Ludian M_S6. 5 earthquake in 2014.We processed the geomagnetic vertical component diurnal variation data by the spatial correlation method. The results show that during the period from April 1 to May 20,2014,there existed quasi-synchronous decrease changes in the coefficient curves between the five geomagnetic stations of Guiyang,Hechi,Nanshan,Muli,Yongning and Xinyi and Hongshan stations. Furthermore,there was a high gradient zone in the normalized correlation coefficient contour map with background values removed. The epicenters of the Yingjiang M_S6. 1 earthquake and the Ludian M_S6. 5 earthquake are located in the gradient zone or near the gradient zone.
Significant anomalies were observed at the geomagnetic stations in the southwest region of China before the Yingjiang M_S6. 1 earthquake and the Ludian M_S6. 5 earthquake in 2014.We processed the geomagnetic vertical component diurnal variation data by the spatial correlation method. The results show that during the period from April 1 to May 20,2014,there existed quasi-synchronous decrease changes in the coefficient curves between the five geomagnetic stations of Guiyang,Hechi,Nanshan,Muli,Yongning and Xinyi and Hongshan stations. Furthermore,there was a high gradient zone in the normalized correlation coefficient contour map with background values removed. The epicenters of the Yingjiang M_S6. 1 earthquake and the Ludian M_S6. 5 earthquake are located in the gradient zone or near the gradient zone.
Significant anomalies were observed at the geomagnetic stations in the southwest region of China before the Yingjiang M_S6. 1 earthquake and the Ludian M_S6. 5 earthquake in 2014.We processed the geomagnetic vertical component diurnal variation data by the spatial correlation method. The results show that during the period from April 1 to May 20,2014,there existed quasi-synchronous decrease changes in the coefficient curves between the five geomagnetic stations of Guiyang,Hechi,Nanshan,Muli,Yongning and Xinyi and Hongshan stations. Furthermore,there was a high gradient zone in the normalized correlation coefficient contour map with background values removed. The epicenters of the Yingjiang M_S6. 1 earthquake and the Ludian M_S6. 5 earthquake are located in the gradient zone or near the gradient zone.
引文
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Li Hongyu,Hao Yongliang,Shen Honghui.Correlations analysis between secular variations of geomagnetic parameters and decadal variations of day length[J].South China Journal of Seismology,2013,33(3):35-40(in Chinese with English abstract).
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Lin Mei,Shen Bin.Correlation between the correlative analysis of vertical component of geomagnetic field and earthquake[J].Journal of Seismological Research,1982,5(2):212-219(in Chinese with English abstract).
Qiu Guilan,He Yue,Wang Dengwei,Zhong Libin.Application of space correlation method of geomagnetic Zcomponent minute-value in earthquake prediction in Sichuan area[J].Plateau Earthquake Research,2014,26(1):1-7(in Chinese with English abstract).
Wang Weilai,Wu Jianping,Fang Lihua,Lai Guijuan.Double difference location of the Ludian MS6.5 earthquake sequences in Yunnan Province in 2014[J].Chinese Journal of Geophysics,2014,57(9):3042-3051(in Chinese with English abstract).
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Xu Wenyao.Geomagnetism[M].Beijing:Seismological Press,2003(in Chinese).
Xu Wenyao.Physics of Electromagnetic Phenomena of the Earth[M].Hefei:University of Science&Technology of China Press,2009(in Chinese).
Zhang Xiuxia,Sun Chunxian,Chen Jian,Song Dewei.The space correlation analysis of digital geomagnetic data[J].Seismological and Geomagnetic Observation and Research,2008,29(6):134-138(in Chinese with English abstract).
Zhao Xu,Huang Zhibin,Fang Lihua.The study on focal mechanism of the MS6.1 Yingjiang,Yunnan earthquake[J].Earthquake Research in China,2014,30(3):462-473(in Chinese with English abstract).
Dai Yong,Gao Lixin,Yang Yanming,Yin Zhanjun,Hao Meixian,Liang Ying,Lu Yingzhe.Analysis on loadunloading response ratio and ratio of daily variation amplitude of geomagnetic vertical component in Gansu and Qinghai region[J].South China Journal of Seismology,2015,35(3):1-6(in Chinese with English abstract).
Ding Jianhai,Che Shi,Yu Surong,Wang Yali.Geomagnetic Diurnal Variation Earthquake Prediction Method and Case Study[M].Beijing:Seismological Press,2009(in Chinese).
Ding Jianhai,Lu Zhenye,Yu Surong.A Brief Treatise on Seismomagnetism Brief Treatise on Seismomagnetism[M].Hefei:University of Science&Technology of China Press,2011(in Chinese).
Feng Zhisheng,Wang Jianyu,Jiang Yanlin,Hu Xiangming.Preliminary application of spatial correlation method of integral hour values of geomagnetic Z component to earthquake prediction in Jiangsu area[J].Journal of Seismology,1998,(3):13-18(in Chinese with English abstract).
Feng Zhisheng,Lin Yunfang,Wang Jianyu,Jiang Yanlin,Sun Wei,Zhuang Minglong.Anomaly index system of geomagnetic load-unloading response ratio in Jiangsu area[J].Earthquake,2000,20(2):61-68(in Chinese with English abstract).
Feng Zhisheng,Wang Jianyu,Jiang Yanlin,Wu Jing,Mei Weiping.Ratio of daily variation amplitude of geomagnetic vertical component and its relation with earthquake[J].South China Journal of Seismology,2001,21(2):20-27(in Chinese with English abstract).
Feng Zhisheng,Mei Weiping,Zhang Suping,Du Bin,Ju Haihua,Yang Congjie,Zhang Xiuxia.Preliminary application of the daily-variation spatial correlation method of vertical component's minutely value of FHDMagnetometer[J].South China Journal of Seismology,2005,25(3):1-7(in Chinese with English abstract).
Feng Zhisheng,Li Qi,Li Hongyu,Ju Haihua.Anti-phase phenomena on two sides of geomagnetic low-point displacement line and its interpretation[J].Earthquake Research in China,2009,25(2):206-213(in Chinese with English abstract).
Li Hongyu,Hao Yongliang,Shen Honghui.Correlations analysis between secular variations of geomagnetic parameters and decadal variations of day length[J].South China Journal of Seismology,2013,33(3):35-40(in Chinese with English abstract).
Li Min.Standarlising Spatial Data:A Kriging Interpolation Based Approach[D].Master's thesis.Xi'an:Xidian University,2011(in Chinese with English abstract).
Lin Mei,Shen Bin.Correlation between the correlative analysis of vertical component of geomagnetic field and earthquake[J].Journal of Seismological Research,1982,5(2):212-219(in Chinese with English abstract).
Qiu Guilan,He Yue,Wang Dengwei,Zhong Libin.Application of space correlation method of geomagnetic Zcomponent minute-value in earthquake prediction in Sichuan area[J].Plateau Earthquake Research,2014,26(1):1-7(in Chinese with English abstract).
Wang Weilai,Wu Jianping,Fang Lihua,Lai Guijuan.Double difference location of the Ludian MS6.5 earthquake sequences in Yunnan Province in 2014[J].Chinese Journal of Geophysics,2014,57(9):3042-3051(in Chinese with English abstract).
Wang Yali,Li Hongyu,Tang Tingmei.Spatial Correlation Anomalies of Diurnal Variation of Geomagnetic ZComponent before the Hercynian Earthquake[A].In:Papers of the 26th Annual Meeting of China Geophysical Society 2010-2010 and the 13th Academic Conference of China Seismological Society[C].Ningbo:Chinese Geophysical Society,Seismological Society of China,2010.372(in Chinese).
Xu Wenyao.Geomagnetism[M].Beijing:Seismological Press,2003(in Chinese).
Xu Wenyao.Physics of Electromagnetic Phenomena of the Earth[M].Hefei:University of Science&Technology of China Press,2009(in Chinese).
Zhang Xiuxia,Sun Chunxian,Chen Jian,Song Dewei.The space correlation analysis of digital geomagnetic data[J].Seismological and Geomagnetic Observation and Research,2008,29(6):134-138(in Chinese with English abstract).
Zhao Xu,Huang Zhibin,Fang Lihua.The study on focal mechanism of the MS6.1 Yingjiang,Yunnan earthquake[J].Earthquake Research in China,2014,30(3):462-473(in Chinese with English abstract).