Coseismic ionospheric disturbances triggered by the Chi-Chi earthquake

J. Y. Liu; H. F. Tsai; C. H. LinM. KamogawaY. I. ChenC. H. LinB. S. HuangS. B. YuY. H. Yeh

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Coseismic ionospheric disturbances triggered by the Chi-Chi earthquake

机译：同震的电离层扰动引发的装腔作势的地震

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摘要

At 17:47 UT on 20 September 1999, a large earthquake of magnitude M_W 7.6 struck the central Taiwan near a small town of Chi-Chi. The ground-based receivers of the global positioning system (GPS) in the Taiwan area detected coseismic ionospheric disturbances (CIDs) in the total electron content (TEC) triggered by the Chi-Chi earthquake.When the CIDs travel away from the origin on the Earth surface and then propagate into the ionosphere, their amplitudes and periods generally become smaller and longer, respectively. Moreover, two global grid searches, adapting the ray-tracing and the beamforming techniques, have been used to analyze the observed GPS TEC. We have not only estimated the average speed of the CIDs propagating in the atmosphere and ionosphere but also determined the location of CID origin on the Earth surface by using the two techniques. The results show that the observed CIDs result from shock-acoustic waves triggered by sudden and, large vertical motions of the Chi-Chi earthquake.

机译：在1999年9月20日17:47 UT,大M_W 7.6级的地震袭击了装腔作势的台湾中部附近的一个小镇。全球定位的地面接收器系统(GPS)在台湾地区检测到同震的电离层扰动(cid)总电子含量(TEC)引发的集集地震。地球表面上的起源电离层传播,其振幅,持续时间也更长,通常变得更小分别。调整光线跟踪和波束形成技术,已用于分析观察到的GPS侦探。平均速度的cid传播大气和电离层也确定了CID起源地球表面上的位置使用两种技术。观察到的cid shock-acoustic的结果波浪引起的突然,大型垂直集集地震的动作。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2010年第8期|A08303:1-A08303:12|共12页
作者
J. Y. Liu; H. F. Tsai; C. H. LinM. KamogawaY. I. ChenC. H. LinB. S. HuangS. B. YuY. H. Yeh;
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作者单位

Department of Physics, Tokyo Gakugei University. Tokyo, Japan.;

Institute of Earth Sciences. Academia Sinica, Taipei, Taiwan.;

Institute of Space Science, National Central University. Chung-Li,Taiwan.Center Weather Bureau, Taipei, Taiwan.Department of Earth Science, National Chong Kung University, Tainan, Taiwan.Institute of Space Statistics, National Central University, Chung-Li,Taiwan.;

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中图分类空间物理;
关键词
Average speed; Earth surface; EarthquakesAmplitudeRay tracingEARTHQUAKE MAGNITUDESmall towns;

机译：平均速度;地表;地震振幅光线追踪地震震级购物中心城镇;

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Coseismic ionospheric disturbances triggered by the Chi-Chi earthquake

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