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The earthquake-related disturbances in ionosphere and project of the first China seismo-electromagnetic satellite

Earthquake Science 2011年第6期24卷 639-650页

作者： Xuhui Shen Xuemin Zhang Lanwei Wang Huaran Chen Yun Wu Shigeng Yuan Junfeng Shen Shufan Zhao Jiadong Qian Jianhai Ding Institute of Earthquake Science China Earthquake Administration Beijing 100036 China Institute of Crustal Dynamics~ China Earthquake Administration Beijing 100085 China Institute of Geophysics China Earthquake Administration Beijing 100081 China Earthquake Administration of Hubei Province Wuhan 430071 China DFH Satellite Co. Ltd. Beijing 100094 China State Key Laboratory of Geological Processes and Mineral Resources Chinese University of Geosciences Beijing 100029 China

Based on the case studies and statistical analysis of earthquake-related ionospheric disturbances mainly from DEMETER satellite, ground-based GPS and ionosounding data, this paper summarizes the statisw tical characteristics of earthquake-related ionospheric disturbances, including electromagnetic emissions, plasma perturbations and variation of energetic particle flux. According to the main results done by Chinese scientists, fusing with the existed study from global researches, seismo-ionospheric disturbances usually occurred a few days or hours before earthquake occurrence. Paralleling to these case studies, lithosphere-atmosphere-ionosphere （LAI） coupling mechanisms are checked and optimized. A thermo-electric model was proposed to explain the seismo-electromagnetic effects before earthquakes. A propagation model was put forward to explain the electromagnetic waves into the ionosphere. According to the requirement of earthquake prediction research, China seismo-electromagnetic satellite, the first space-based platform of Chinese earthquake stereoscopic observation system, is proposed and planned to launch at about the end of 2014. It focuses on checking the LAI model and distinguishing earthquake-related ionospheric disturbance. The preliminary design for the satellite will adopt CAST-2000 platform with eight payloads onboard. It is believed that the satellite will work together with the ground monitoring network to improve the capability to capture seismo-electromagnetic information, which is beneficial for earthquake monitoring and prediction researches.

关键词： seismo-ionospheric coupling earthquake-related ionospheric disturbance China seismoelectromagnetic satellite lithosphere-atmosphere-ionosphere coupling model

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