| 利用电离层层析技术探测日本9.0级地震前电离层异常 |
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| 引用本文： | 陈必焰,戴吾蛟,蔡昌盛,匡翠林,刘莹.利用电离层层析技术探测日本9.0级地震前电离层异常[J].大地测量与地球动力学,2011,31(6):11-14. |
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| 作者姓名： | 陈必焰 戴吾蛟 蔡昌盛 匡翠林 刘莹 |
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| 作者单位： | 中南大学测绘与国土信息工程系,长沙,410083 |
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| 基金项目： | 国家自然科学基金，中南大学前沿研究计划 |
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| 摘 要： | 利用电离层层析技术对日本Ms9.0地震前21天震中区域附近上空电离层进行了三维重构,并通过2倍标准差方法对反演出的各时刻电离层各格网点电子密度值进行了异常探测.在排除太阳和地磁活动影响后分析得出:2月28日UT14:00-16:00出现的电离层电子密度值异常减小、3月2日UT08:00-14:00、3日UT00:00-...
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| 关 键 词： | 日本Ms9.0地震 电离层 层析技术 电离层异常 电子密度值 |
IONOSPHERIC ANOMALY DETECTION BEFORE JAPAN Ms9.0 EARTHQUAKE BY USE OF IONOSPHERIC TOMOGRAPHY TECHNOLOGY |
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| Chen Biyan,Dai Wujiao,Cai Changsheng,Kuang Cuilin,Liu Ying.IONOSPHERIC ANOMALY DETECTION BEFORE JAPAN Ms9.0 EARTHQUAKE BY USE OF IONOSPHERIC TOMOGRAPHY TECHNOLOGY[J].Journal of Geodesy and Geodynamics,2011,31(6):11-14. |
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| Authors: | Chen Biyan Dai Wujiao Cai Changsheng Kuang Cuilin Liu Ying |
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| Institution: | (Department of Geomatics Engineering,Central South University,Changsha 410083) |
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| Abstract: | By use of the technology of ionospheric tomography，three dimension ionospheric electronic density in a time length of 21 days prior to Japan March 11,2011 earthquake were reconstructed over the epicenter area, and the electron density anomaly detection was conducted at all ionosphere grid network points for a specific time period. After excluding the effect of solar and geomagnetic activity，the computational results indicate that the abnormal ionospheric electron density decreased at the Universal Time (UT) of 14:00-16:00 on February 28 and increased at 08:00-14:00 on March 2, 00:00-06:00 on March 3, and 12:00-20:00 on March 4. The occurrence of these anomalies is likely a precursor of the Japan Ms9.0 earthquake. |
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| Keywords: | Japan Ms9 0 earthquake ionosphere tomography ionospheric anomalies electron density |
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