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DEMETER卫星探测到可能与汶川地震有关的地面VLF发射站信号的信噪比变化 被引量:22

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摘要 中国周边有多个应用于导航的VLF发射站,当DEMETER卫星飞经中国大陆上空时,它可以接收到来自这些发射站的信号.利用DEMETER卫星接收到的来自5个不同发射站发出的VLF信号数据,对发生在四川汶川8.0级地震进行研究,发现震中上空区域不同频率信号对应的信噪比在地震前后都发生明显的变化:震前明显降低,震后有所恢复.这个现象可能与地震和电离层耦合有关.
出处 《中国科学(D辑)》 CSCD 北大核心 2009年第4期403-412,共10页 Science in China(Series D)
基金 中国地震局地球物理研究所中央级公益性科研院所基本科研业务专项(编号:DQJB08Z08) 国家科技支撑计划课题(编号:2008BAC35B01)资助
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