Storm time evolution of ELF/VLF waves observed by DEMETER satellite
Storm time evolution of ELF/VLF waves observed by DEMETER satellite
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DOI：
10.1002/2013ja019237
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发表时间：
2014-04
期刊：
影响因子：
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通讯作者：
Z. Zhima;Jinbin Cao;Wenlong Liu;H. Fu;Tieyan Wang;Xuemin Zhang;X. Shen
中科院分区：
文献类型：
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作者：
Z. Zhima;Jinbin Cao;Wenlong Liu;H. Fu;Tieyan Wang;Xuemin Zhang;X. Shen
本文利用太阳同步卫星DEMETER（Detection of Electro Magnetic Waves Transmitted from Earthquake Regions）的资料，研究了2005 - 2009年强日冕物质抛射（CME）驱动的磁暴期间ELF/VLF波的暴时变化。结果表明，ELF/VLF波的增强与CME事件有很好的相关性。紧接着在初始阶段CME驱动的波活动增强，在风暴主相开始时波强度暂时降低。最强波主要出现在主相后期到恢复相早期。在整个风暴期间，低于3 kHz的ELF波明显增强，而高于3 kHz的高频波似乎主要在主波后期和恢复初期加强。3 kHz以下的ELF波可以存在于很宽的L壳层范围内，其强度峰值在L ~ 3和4处。f > 9 kHz的高频波主要存在于等离子体层顶之外。日面的ELF/VLF波较强，持续时间较长。
In this paper, using the data of Sun‐synchronous satellite (Detection of Electro‐Magnetic Waves Transmitted from Earthquake Regions) DEMETER, we investigated the storm time variations of ELF/VLF waves during the intense coronal mass ejections (CME)‐driven storms from 2005 to 2009. The results show that there is a good correlation between the enhancement of ELF/VLF waves and the CME events. Immidately following the enhanced wave activity driven by CMEs at the initial phase, the wave intensity decreases temporarily at the beginning of storm main phase. The strongest waves predominantly occur from the late main phase to early recovery phase. The ELF waves below 3 kHz are significantly intensified during the whole storm time, while the high‐frequency waves above 3 kHz seem strengthened predominantly during the late main and early recovery phase. The ELF waves below 3 kHz can exist in a wide L shell range, with the intensity peaking at L ~ 3 and 4. High‐frequency waves at f > 9 kHz exist mostly outside the plasmapause. The stronger ELF/VLF waves on the dayside can last longer time than those on the nightside.