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Responses of the Ionosphere to the Great Sumatra Earthquake and Volcanic Eruption of Pinatubo
作者姓名:郝永强  肖佐  张东和
作者单位:[1]Department of Geophysics, Peking University, Beijing 100871 [2]Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100080
基金项目:Supported by the National Natural Science Foundation of China under Grant Nos 40274053 and 40134020.
摘    要:

关 键 词:电离层  喷发  扰动  Sumatra  地震  次声波
收稿时间:2006-03-25
修稿时间:2006-03-25

Responses of the Ionosphere to the Great Sumatra Earthquake and Volcanic Eruption of Pinatubo
HAO Yong-Qiang, XIAO Zuo, ZHANG Dong-He.Responses of the Ionosphere to the Great Sumatra Earthquake and Volcanic Eruption of Pinatubo[J].Chinese Physics Letters,2006,23(7):1955-1957.
Authors:HAO Yong-Qiang  XIAO Zuo  ZHANG Dong-He
Abstract:A sudden ionospheric disturbance was detected by the Doppler shift sounding equipment at Beijing, about 25 min later after the outbreak of the Sumatra earthquake on 26 December 2004. This ionospheric disturbance appeared less than lOmin after the earthquake was first recorded at Beijing seismological station by the arrival of the seismic Rayleigh wave. The analysis shows that about 18rain is the time necessary for the seismic Rayleigh wave to propagate from the epicentre to Beijing and then about 5-10min for acoustic waves to propagate from the surface of the Beijing area to the altitude of the ionosphere. Also, a report was made as another example to show the ionospheric response of Doppler shift observation at Beijing area during the Mount Pinatubo eruption of 1991. These two examples show clear evidence of the lithosphere-atmosphere-ionosphere coupling. The former case is in the frequency domain of infrasonic waves of the Earth surface oscillation due to the Rayleigh waves caused by the earthquake, while the latter is in the acoustic-gravity wave category directly excited in the atmosphere by the mass and energy eruptions of Mount Pinatubo.
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