智利8.8级地震的震前电子浓度扰动
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摘要
基于法国DEMETER卫星数据,在识别2级图像的基础上,通过对1级数据进行滑动中值处理、纬度变化分析以及空间差值研究,发现2010年2月27日智利8.8级地震的震前震中区上空附近有异常变化:20日距离震中1500 km处电子浓度升高,24日电子浓度降低;25、26日电场、磁场及部分等离子体参量呈现同步扰动;26日2条轨道的电子浓度值出现高于背景值的异常;27日震前4小时在磁赤道附近出现电场频谱下降,等离子体参量强烈扰动的现象.
Based on the data of France DEMETER(Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite,some abnormities in the ionosphere above the epicenter of February 27~(th),2010,Chile M8.8 earthquake were found through distinguishing level 2 picture and analyzing level 1 data with moving median,latitude study,and spatial difference methods.In the area 1500 km apart from the epicenter,electron density rose on Feb 20~(th). Electron density declined on 24~(th).Electric,magnetic fields and some plasma parameters disturbed at the same time on 25~(th) and 26~(th).Besides that,on 26~(th),electron density of 2 orbits exceeded the background values.Electric field spectrum around magnetic equator on 27~(th) began to drop 4 hours before the earthquake,and there were simultaneous strong perturbations of some plasma parameters.
Based on the data of France DEMETER(Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite,some abnormities in the ionosphere above the epicenter of February 27~(th),2010,Chile M8.8 earthquake were found through distinguishing level 2 picture and analyzing level 1 data with moving median,latitude study,and spatial difference methods.In the area 1500 km apart from the epicenter,electron density rose on Feb 20~(th). Electron density declined on 24~(th).Electric,magnetic fields and some plasma parameters disturbed at the same time on 25~(th) and 26~(th).Besides that,on 26~(th),electron density of 2 orbits exceeded the background values.Electric field spectrum around magnetic equator on 27~(th) began to drop 4 hours before the earthquake,and there were simultaneous strong perturbations of some plasma parameters.
引文
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[17]Parrot M,Berthelier J J,Lebreton J P,et al.Examples of unusual ionospheric observations made by the DEMETER satellite over seismic regions.Physics and Chemistry of the Earth,2006,31(4-9):486-495
[18]Bhattacharya S,Sarkar S,Gwal A K,et al.Satellite and ground-based ULF/ELF emissions observed before Gujarat earthquake in March 2006.Current Science,2007,93(1): 41-46
[19]张学民,钱家栋,欧阳新艳等.DEMETER卫星观测到的智利7.9级地震前的电离层电磁扰动.地球物理学进展,2009, 24(4):1196-1203 Zhang X M,Qian J D,Ouyang X Y,et al.Ionospheric electromagnetic disturbances observed on DEMETER satellite before an earthquake of M7.9 in Chili.Progress in Geophysics (in Chinese),2009,24(4):1196-1203
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[21]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.地球物理学报,2009,52(1): 11-19 Zeng Z C,Zhang B,Fang G Y,et al.The analysis of ionospheric variations before Wenchuan earthquake with DEMETER data.Chinese J.Geophys.(in Chinese),2009, 52(1):11-19
[22]Liu J,Zhang X M,Wan W X,et al.Study on the electronic density perturbation detected by DEMETER satellite before Wenchuan earthquake.IGARSS,2010,THP2-PE.10,pg.3382
[23]Pulinets S,Ouzounov D,Parrot M.Conjugated nearequatorial effects registered by DEMETER satellite before Sumatra earthquake M8.7 of March 28,2005.International symposium DEMETER,Touious-France,2006.14-16
[24]张学民,钱家栋,欧阳新艳等.夏季磁静日中国大陆上空电离层电子浓度变化特征.中国地震,2008,24(3):261-268
[25]欧阳新艳,张学民,申旭辉等.普洱地震前电离层电子密度扰动变化研究.地震学报,2008,30(4):424-436 Ouyang X Y,Zhang X M,Shen X H,et al.Study on ionospheric Ne disturbances before 2007 Pu'er,Yunnan of China,earthquake.Acta Seismologica Sinica(in Chinese), 2008,30(4):424- 436
[26]Liu J Y,Chen Y I,Chuo Y J,et al.A statistical investigation of pre-earthquake ionospheric anomaly.J. Geophys.Res.,2006,111,A05304,doi:10.1029/2005JA011333
[27]Takeuchi A,Lau B W S,Freund F T.Current and surface potential induced by stress-activated positive holes in igneous rocks.Physics and Chemistry of the Earth,Parts A/B/C, 2006,31(4-9):240-247
[2]Pulinets S A,Khegai V V,Boyarchuk K A,et al. Atmospheric electric field as a source of ionospheric variability. Physics-Uspekhi,1998,41(5):515-522
[3]Pulinets S A,Legen'ka,A D,Gaivoronskaya T V,et al. Main phenomenological features of ionospheric precursors of strong earthquakes.Journal of Atmospheric and Solar-Terrestrial Physics,2003,65(16-18):1337-1347
[4]Pulinets S A,Liu J Y,Safronova I A.Interpretation of a statistical analysis of variation in the f_oF_2 critical frequency before earthquake based on data from Chung-Li ionospheric station(Taiwan).Geomagnetism and Aeronomy,2004,44 (1):102-106
[5]Liu J Y,Chen Y I,Pulinets S A,et al.Seismo-ionospheric signatures prior to M≥6.0 Taiwan earthquakes.Geophysical Research Letters,2000,27,3113-3116
[6]Zhao B Q,Wang M,Yu T,et al.Is an unusual large enhancement of ionospheric electron density linked with the 2008 great Wenchuan earthquake? J.Geophys.Res.,2008, 113,A11304,doi:10.1029/2008JA013613
[7]Perrone L,Korsunova L P,Mikhailov A V.Ionospheric precursors for crustal earthquakes in Italy.Ann.Geophys., 2010,28(4):941-950
[8]Kamogawa M.Preseismic lithosphere-atmosphere-ionosphere coupling.EOS Transactions,2006,87(40):417-424
[9]Hayakawa M.Electromagnetic phenomena associated with earthquakes.IEEJ Transactions on Fundamentals and Materials, 2006,126(4):211-214
[10]Pulinets S A,Boyarchuk B.Ionospheric Precursors of Earthquakes,Berlin:Springer-Verlag,2004
[11]Cussac T,Clair M A,Ultre-Guerard P,et al.The Demeter microsatellite and ground segment.Planetary and Space Science,2006,54(5):413-427
[12]Berthelier J J,Godefroy M,Leblanc F,et al.ICE,the electric field experiment on DEMETER.Planetary and Space Science,2006,54(5),456-471
[13]Parrot M,Benoist D,Berthelier J J,et al.The magnetic field experiment IMSC and its data processing onboard DEMETER:Scientific objectives,description and first results.Planetary and Space Science,2006,54(5),441-455
[14]Berthelier J J,Godefroy M,Leblanc F,et al.IAP,the thermal plasma analyzer on DEMETER.Planetary and Space Science,2006,54(5),487-501
[15]Lebreton J P,Stverak S,Travnicek P,et al.The ISL Langmuir Probe experiment procession onboard DEMETER, Scientific objectives,description and first results.Planetary and Space Science,2006,54(5):472-486
[16]Sauvauda J A,Moreau T,Maggiolo R,et al.High-energy electron detection onboard DEMETER:The IDP spectrometer, description and first results on the inner belt.Planetary and Space Science,2006,54(5):502-511
[17]Parrot M,Berthelier J J,Lebreton J P,et al.Examples of unusual ionospheric observations made by the DEMETER satellite over seismic regions.Physics and Chemistry of the Earth,2006,31(4-9):486-495
[18]Bhattacharya S,Sarkar S,Gwal A K,et al.Satellite and ground-based ULF/ELF emissions observed before Gujarat earthquake in March 2006.Current Science,2007,93(1): 41-46
[19]张学民,钱家栋,欧阳新艳等.DEMETER卫星观测到的智利7.9级地震前的电离层电磁扰动.地球物理学进展,2009, 24(4):1196-1203 Zhang X M,Qian J D,Ouyang X Y,et al.Ionospheric electromagnetic disturbances observed on DEMETER satellite before an earthquake of M7.9 in Chili.Progress in Geophysics (in Chinese),2009,24(4):1196-1203
[20]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.空间科学学报,2009,29(2):213-221 Zhang X M,Qian J D,Ouyang X Y,et al.Ionospheric electro-magnetic disturbances prior to Yutian 7.2 earthquake in Xinjiang.Chinese Journal of Space Science(in Chinese), 2009,29(2):213-221
[21]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.地球物理学报,2009,52(1): 11-19 Zeng Z C,Zhang B,Fang G Y,et al.The analysis of ionospheric variations before Wenchuan earthquake with DEMETER data.Chinese J.Geophys.(in Chinese),2009, 52(1):11-19
[22]Liu J,Zhang X M,Wan W X,et al.Study on the electronic density perturbation detected by DEMETER satellite before Wenchuan earthquake.IGARSS,2010,THP2-PE.10,pg.3382
[23]Pulinets S,Ouzounov D,Parrot M.Conjugated nearequatorial effects registered by DEMETER satellite before Sumatra earthquake M8.7 of March 28,2005.International symposium DEMETER,Touious-France,2006.14-16
[24]张学民,钱家栋,欧阳新艳等.夏季磁静日中国大陆上空电离层电子浓度变化特征.中国地震,2008,24(3):261-268
[25]欧阳新艳,张学民,申旭辉等.普洱地震前电离层电子密度扰动变化研究.地震学报,2008,30(4):424-436 Ouyang X Y,Zhang X M,Shen X H,et al.Study on ionospheric Ne disturbances before 2007 Pu'er,Yunnan of China,earthquake.Acta Seismologica Sinica(in Chinese), 2008,30(4):424- 436
[26]Liu J Y,Chen Y I,Chuo Y J,et al.A statistical investigation of pre-earthquake ionospheric anomaly.J. Geophys.Res.,2006,111,A05304,doi:10.1029/2005JA011333
[27]Takeuchi A,Lau B W S,Freund F T.Current and surface potential induced by stress-activated positive holes in igneous rocks.Physics and Chemistry of the Earth,Parts A/B/C, 2006,31(4-9):240-247
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