日本九州岛地震震前电离层TEC异常
|
摘要
采用IGS发布的GIM数据,提出了一种结合滑动时窗法和临近格网点电离层TEC相关性分析法的联合分析方法,研究了震前电离层异常变化与地震的关系。通过分析震区附近5个格网点TEC的异常变化情况,发现震前电离层TEC发生明显异常变化,且格网点之间的TEC序列相关性受地震显著影响;通过分析二维电离层图的TEC异常空间分布,发现震前三天震中附近分别出现6h、12h和6h的异常。最后利用电离层层析的方法,对电离层异常时刻进行了电子密度的反演,进一步分析了电子密度在电离层异常时刻的分布情况。
GIM data released by IGS is used in the article and a new method of combining the Sliding Time Window Method and the Ionospheric TEC correlation analysis method of adjacent grid points is proposed to study the relationship between pre-earthquake ionospheric anomalies and earthquake.By analyzing the abnormal change of TEC in the 5grid points around the seismic region,the abnormal change of ionospheric TEC is found before the earthquake and the correlation between the TEC sequences of lattice points is significantly affected by earthquake.Based on the analysis of the spatial distribution of TEC anomaly,anomalies of 6h,12 hand 6hwere found near the epicenter three days before the earthquake.Finally,ionospheric tomographic technology is used to do tomographic inversion on electron density.And the distribution of the electron density in the ionospheric anomaly is further analyzed.
GIM data released by IGS is used in the article and a new method of combining the Sliding Time Window Method and the Ionospheric TEC correlation analysis method of adjacent grid points is proposed to study the relationship between pre-earthquake ionospheric anomalies and earthquake.By analyzing the abnormal change of TEC in the 5grid points around the seismic region,the abnormal change of ionospheric TEC is found before the earthquake and the correlation between the TEC sequences of lattice points is significantly affected by earthquake.Based on the analysis of the spatial distribution of TEC anomaly,anomalies of 6h,12 hand 6hwere found near the epicenter three days before the earthquake.Finally,ionospheric tomographic technology is used to do tomographic inversion on electron density.And the distribution of the electron density in the ionospheric anomaly is further analyzed.
引文
[1]CALAIS E,MINSTER J B.GPS Detection of Ionospheric Perturbations Following the January 17,1994,Northridge Earthquake[J].Geophysical Research Letters,1995,22(9):1045-1048.
[2]姚宜斌,陈鹏,吴寒,等.2011年3月11日日本地震震前电离层异常变化分析[J].科学通报,2012,57(5):355-365.YAO Yibin,CHEN Peng,WU Han,et al.Analysis of Ionospheric Anomalies before the 2011 Mw 9.0 Japan Earthquake[J].Chinese Science Bulletin,2012,57(5):355-365.
[3]祝芙英,吴云,林剑,等.汶川Ms 8.0地震前电离层TEC异常分析[J].大地测量与地球动力学,2008,28(6):16-21.ZHU Fuying,WU Yun,LIN Jian,et al.Study on Ionospheric TEC Anomaly Prior to Wenchuan Ms 8.0Earthquake[J].Journal of Geodesy and Geodynamics,2008,28(6):16-21.
[4]LIU J Y,CHEN Y I,CHUO Y J,et al.A Statistical Investigation of Preearthquake Ionospheric Anomaly[J].Journal of Geophysical Research,2006,111(A5):A05304.
[5]LEONARD R S,BARNES R A JR.Observation of Ionospheric Disturbances Following the Alaska Earthquake[J].Journal of Geophysical Research,1965,70(5):1250-1253.
[6]张学民,刘静,赵必强,等.玉树地震前的电离层异常现象分析[J].空间科学学报,2014,34(6):822-829.ZHANG Xuemin,LIU Jing,ZHAO Biqiang,et al.Analysis on Ionospheric Perturbations before Yushu Earthquake[J].Chinese Journal of Space Science,2014,34(6):822-829.
[7]陈鹏.GNSS电离层层析及震前电离层异常研究[J].测绘学报,2013,03:474.CHEN Peng.Research on GNSS-based ionospheric tomography and Pre-earthquake ionospheric Anomaly[J].Acta Geodaetica et Cartographica Sinica,2013,03:474.
[8]姚宜斌,翟长治,孔建,刘磊.2015年尼泊尔地震的震前电离层异常探测[J].测绘学报,2016,45(4):385-395.YAO Yibin,ZHAI Changzhi,KONG Jian,Liu Lei.The Pre-earthquake Ionosphere Anomaly of the 2015 Nepal Earthquake[J].Acta Geodaetica et Cartographica Sinica,2016,45(4):385:395.
[9]PULINETS S A,LEGEN’KA A D,GAIVORONSKAYA T V,et al.Main Phenomenological Features of Ionospheric Precursors of Strong Earthquakes[J].Journal of Atmospheric and Solar-Terrestrial Physics,2003,65(16-18):1337-1347.
[10]LIU J Y,CHEN Y I,PULINETS S A,et al.SeismoIonospheric Signatures Prior to M≥6.0 Taiwan Earthquakes[J].Geophysical Research Letters,2000,27(19):3113-3116.
[11]LIU J Y,TSAI H F,LIN C H,et al.Coseismic Ionospheric Disturbances Triggered by the Chi-Chi Earthquake[J].Journal of Geophysical Research,2010,115(A8):A08303.
[12]LIU J Y,CHEN Y I,CHUO Y J,et al.Variations of Ionospheric Total Electron Content during the Chi-Chi Earthquake[J].Geophysical Research Letters,2001,28(7):1383-1386.
[13]DAUTERMANN T,CALAIS E,HAASE J,et al.Investigation of Ionospheric Electron Content Variations before Earthquakes in Southern California,2003—2004[J].Journal of Geophysical Research,2007,112(B2):B02106.
[14]TAYLOR J R,LESTER M,YEOMAN T K.A Superposed Epoch Analysis of Geomagnetic Storms[J].Annales Geophysicae,1994,12(7):612-624.
[15]马一方,姜卫平,席瑞杰.利用全球电离层地图分析芦山地震电离层异常变化[J].武汉大学学报(信息科学版),2015,40(9):1274-1278.MA Yifang,JIANG Weiping,XI Ruijie.Analysis of Seismoionospheric Anomalies in Vertical Total Electron Content of GIM for Lushan Earthquake[J].Geomatics and Information Science of Wuhan University,2015,40(9):1274-1278.
[2]姚宜斌,陈鹏,吴寒,等.2011年3月11日日本地震震前电离层异常变化分析[J].科学通报,2012,57(5):355-365.YAO Yibin,CHEN Peng,WU Han,et al.Analysis of Ionospheric Anomalies before the 2011 Mw 9.0 Japan Earthquake[J].Chinese Science Bulletin,2012,57(5):355-365.
[3]祝芙英,吴云,林剑,等.汶川Ms 8.0地震前电离层TEC异常分析[J].大地测量与地球动力学,2008,28(6):16-21.ZHU Fuying,WU Yun,LIN Jian,et al.Study on Ionospheric TEC Anomaly Prior to Wenchuan Ms 8.0Earthquake[J].Journal of Geodesy and Geodynamics,2008,28(6):16-21.
[4]LIU J Y,CHEN Y I,CHUO Y J,et al.A Statistical Investigation of Preearthquake Ionospheric Anomaly[J].Journal of Geophysical Research,2006,111(A5):A05304.
[5]LEONARD R S,BARNES R A JR.Observation of Ionospheric Disturbances Following the Alaska Earthquake[J].Journal of Geophysical Research,1965,70(5):1250-1253.
[6]张学民,刘静,赵必强,等.玉树地震前的电离层异常现象分析[J].空间科学学报,2014,34(6):822-829.ZHANG Xuemin,LIU Jing,ZHAO Biqiang,et al.Analysis on Ionospheric Perturbations before Yushu Earthquake[J].Chinese Journal of Space Science,2014,34(6):822-829.
[7]陈鹏.GNSS电离层层析及震前电离层异常研究[J].测绘学报,2013,03:474.CHEN Peng.Research on GNSS-based ionospheric tomography and Pre-earthquake ionospheric Anomaly[J].Acta Geodaetica et Cartographica Sinica,2013,03:474.
[8]姚宜斌,翟长治,孔建,刘磊.2015年尼泊尔地震的震前电离层异常探测[J].测绘学报,2016,45(4):385-395.YAO Yibin,ZHAI Changzhi,KONG Jian,Liu Lei.The Pre-earthquake Ionosphere Anomaly of the 2015 Nepal Earthquake[J].Acta Geodaetica et Cartographica Sinica,2016,45(4):385:395.
[9]PULINETS S A,LEGEN’KA A D,GAIVORONSKAYA T V,et al.Main Phenomenological Features of Ionospheric Precursors of Strong Earthquakes[J].Journal of Atmospheric and Solar-Terrestrial Physics,2003,65(16-18):1337-1347.
[10]LIU J Y,CHEN Y I,PULINETS S A,et al.SeismoIonospheric Signatures Prior to M≥6.0 Taiwan Earthquakes[J].Geophysical Research Letters,2000,27(19):3113-3116.
[11]LIU J Y,TSAI H F,LIN C H,et al.Coseismic Ionospheric Disturbances Triggered by the Chi-Chi Earthquake[J].Journal of Geophysical Research,2010,115(A8):A08303.
[12]LIU J Y,CHEN Y I,CHUO Y J,et al.Variations of Ionospheric Total Electron Content during the Chi-Chi Earthquake[J].Geophysical Research Letters,2001,28(7):1383-1386.
[13]DAUTERMANN T,CALAIS E,HAASE J,et al.Investigation of Ionospheric Electron Content Variations before Earthquakes in Southern California,2003—2004[J].Journal of Geophysical Research,2007,112(B2):B02106.
[14]TAYLOR J R,LESTER M,YEOMAN T K.A Superposed Epoch Analysis of Geomagnetic Storms[J].Annales Geophysicae,1994,12(7):612-624.
[15]马一方,姜卫平,席瑞杰.利用全球电离层地图分析芦山地震电离层异常变化[J].武汉大学学报(信息科学版),2015,40(9):1274-1278.MA Yifang,JIANG Weiping,XI Ruijie.Analysis of Seismoionospheric Anomalies in Vertical Total Electron Content of GIM for Lushan Earthquake[J].Geomatics and Information Science of Wuhan University,2015,40(9):1274-1278.