DEMETER卫星监测到的海地地震前电离层扰动
|
摘要
本文利用法国DEMETER卫星观测到的电离层数据,对2010年1月12日加勒比海地区海地太子港附近发生的MS7.1地震震前电离层扰动进行了探索性研究。通过对电磁场频谱、等离子体数密度、温度等物理参量的分析,探讨了电离层变化与地震的关系。研究结果表明,海地地震前出现的异常电磁现象的空间效应是清楚的,震前几小时磁赤道峰存在剧烈扰动,震中附近电场分量E12低频谱密度有增强现象。临震前1天和临震前3天在震中+5°范围电子数密度(Ne)出现异常,震前8天氧离子(O+)数密度在震中上空出现了异常现象。震前震中区上空电磁场VLF在40 Hz和120 Hz等低频点出现清晰的电场异常扰动,震前出现的这种变化可能与地震有关。
Based on the ionosperic data observed on Demeter,we did some exploratory research on the ionospheric disturbances prior to the Haiti MS7.1 earthquake on Jan.12,2010.By analysing electromagnetic frequency,plasma density and temperature,the relation between the ionospheric disturbances and the earthquake was discussed.It is showed that the electromagnetic anomalies were clear prior to the Haiti earthquake.The magnetic equator peak value was severely disturbed and the low frequency spectral density of the electric field E12 increased.The density of O+ near the epicenter changed abnormally.The electromagnetic low frequency(VLF 40 Hz and 120 Hz) anomalies also clearly appeared over the epicenter before the earthquake.
Based on the ionosperic data observed on Demeter,we did some exploratory research on the ionospheric disturbances prior to the Haiti MS7.1 earthquake on Jan.12,2010.By analysing electromagnetic frequency,plasma density and temperature,the relation between the ionospheric disturbances and the earthquake was discussed.It is showed that the electromagnetic anomalies were clear prior to the Haiti earthquake.The magnetic equator peak value was severely disturbed and the low frequency spectral density of the electric field E12 increased.The density of O+ near the epicenter changed abnormally.The electromagnetic low frequency(VLF 40 Hz and 120 Hz) anomalies also clearly appeared over the epicenter before the earthquake.
引文
[1]何宇飞.地震电磁前兆的观测[J].国际地震动态,2009,(3):28-36.
[2]Lagoutte D,Brochot J Y,de Carvalho D,et al.The DEMETER Science Mission Centre[J].Plane-tary and Space Science,2006,54:428-440.
[3]Parrot M,Berthelier J J,Lebreton J P,et al.Examples of unusual ionospheric observations made bythe DEMETER satellite over seismic regions[J].Physics and Chemistry of the Earth,2006,31:486-495.
[4]Bhattacharya S,Sarkar S,Gwal A K,et al.Observations of ULF/ELF anomalies detected by DE-METER satellite prior to earthquakes[J].Indian Radio Space Physics.2007,36:103-113.
[5]Muto F,Yoshida M,Horie T,et al.Detection of ionospheric perturbations associated with Japaneseearthquakes on the basis of reception of LF transmitter signals on the satellite DEMETER[J].NatHazards Earth Sys Sic,2008,8:135-141.
[6]朱荣.从卫星观测数据提取地震电离层前兆信息的初探[D].中国地震局地球物理研究所,2007.
[7]丁鉴海,申旭辉,潘威炎,等.地震电磁前兆研究进展[J].电波科学学报,2006,21(6):791-801.
[8]曾中超,张蓓,方广有,等.利用DEMETER卫星数据分析汶川地震前的电离层异常[J].地球物理学报,2009,52:11-19.
[9]董健,颜蕊,张学民,等.基于DEMETER卫星观测数据的电离层地震前兆分析以汶川地震、东海地震为例[J].地震,2009,29(10):67-75.
[10]张学民,钱家栋,欧阳新艳,等.新疆于田7.2级地震前的电离层电磁扰动[J].空间科学学报,2009,2:213-221.
[11]Serebryakova O N,Bilichenko S V,Chmyrev V M,et al.Electromagnetic ELF radiation fromearthquake regions as observed by low-altitude satellite[J].Geophysical research letters,1992,19:91-94.
[12]Parrot M,Mogilevsky M M.VLF emissions associated with earthquakes and observed in the iono-sphere and the magnetosphere[J].Physics of The Earth and Planetary Interiors,1989,57:86-99.
[13]张学民,刘静,钱家栋,等.西藏改则6.9级地震前的电离层电磁扰动[J].地震,2008,28(1):14-12.
[14]Molchanov O,Rozhnoil A,SoIovieva M,et al.Global diagnostics of the ionospheric perturbationsrelated to the seismic activity using the VLF radio signals collected on the DEM ETER satellite[J].Nat Hazards Earth Syst Sci,2006,6:745-753.
[15]欧阳新艳.利用DEMETER卫星数据提取地震异常的方法初探以普洱地震为例[D].中国地震局地震预测研究所,2008.
[16]Zhao Guoze,Chen Xiaobin,Cai Juntao,et al.Electromagnetic observation by satellite and earth-quake prediction[J].Progress in Geophysic,2007,22(3):667-673.
[17]梁凯利,王峰.中外地震专家对海地地震的综合分析.国际地震动态,2010,(1):3-5.
[2]Lagoutte D,Brochot J Y,de Carvalho D,et al.The DEMETER Science Mission Centre[J].Plane-tary and Space Science,2006,54:428-440.
[3]Parrot M,Berthelier J J,Lebreton J P,et al.Examples of unusual ionospheric observations made bythe DEMETER satellite over seismic regions[J].Physics and Chemistry of the Earth,2006,31:486-495.
[4]Bhattacharya S,Sarkar S,Gwal A K,et al.Observations of ULF/ELF anomalies detected by DE-METER satellite prior to earthquakes[J].Indian Radio Space Physics.2007,36:103-113.
[5]Muto F,Yoshida M,Horie T,et al.Detection of ionospheric perturbations associated with Japaneseearthquakes on the basis of reception of LF transmitter signals on the satellite DEMETER[J].NatHazards Earth Sys Sic,2008,8:135-141.
[6]朱荣.从卫星观测数据提取地震电离层前兆信息的初探[D].中国地震局地球物理研究所,2007.
[7]丁鉴海,申旭辉,潘威炎,等.地震电磁前兆研究进展[J].电波科学学报,2006,21(6):791-801.
[8]曾中超,张蓓,方广有,等.利用DEMETER卫星数据分析汶川地震前的电离层异常[J].地球物理学报,2009,52:11-19.
[9]董健,颜蕊,张学民,等.基于DEMETER卫星观测数据的电离层地震前兆分析以汶川地震、东海地震为例[J].地震,2009,29(10):67-75.
[10]张学民,钱家栋,欧阳新艳,等.新疆于田7.2级地震前的电离层电磁扰动[J].空间科学学报,2009,2:213-221.
[11]Serebryakova O N,Bilichenko S V,Chmyrev V M,et al.Electromagnetic ELF radiation fromearthquake regions as observed by low-altitude satellite[J].Geophysical research letters,1992,19:91-94.
[12]Parrot M,Mogilevsky M M.VLF emissions associated with earthquakes and observed in the iono-sphere and the magnetosphere[J].Physics of The Earth and Planetary Interiors,1989,57:86-99.
[13]张学民,刘静,钱家栋,等.西藏改则6.9级地震前的电离层电磁扰动[J].地震,2008,28(1):14-12.
[14]Molchanov O,Rozhnoil A,SoIovieva M,et al.Global diagnostics of the ionospheric perturbationsrelated to the seismic activity using the VLF radio signals collected on the DEM ETER satellite[J].Nat Hazards Earth Syst Sci,2006,6:745-753.
[15]欧阳新艳.利用DEMETER卫星数据提取地震异常的方法初探以普洱地震为例[D].中国地震局地震预测研究所,2008.
[16]Zhao Guoze,Chen Xiaobin,Cai Juntao,et al.Electromagnetic observation by satellite and earth-quake prediction[J].Progress in Geophysic,2007,22(3):667-673.
[17]梁凯利,王峰.中外地震专家对海地地震的综合分析.国际地震动态,2010,(1):3-5.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心