Observations of hydromagnetic emissions
Observations of hydromagnetic emissions
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水磁发射的观测
DOI：
10.1029/jz066i006p01651
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发表时间：
1961
影响因子：
--
通讯作者：
L. Tepley
中科院分区：
文献类型：
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作者：
L. Tepley
本文讨论了0.5- 5cps频率范围内地磁微脉动频率-时间分析的初步结果。得出这些结果的数据是1960年11月18日至21日在加州帕洛阿尔托附近记录的。有时，连续观察到频率缓慢变化的振荡信号长达数小时。还观察到频率变化更快的信号，但持续时间更短，通常为10至30分钟。在内华达州伊利附近的加州理工学院台站以及加州伊莎贝拉和帕洛玛山附近的波形记录上，发现相同频率的振荡同时发生。这种振荡被称为磁流体发射，因为初步证据表明，它们是在电离层上方或高处产生的，并通过磁流体波向下传播。在获得数据的时间间隔之前和包括这段时间，太阳耀斑活动的特点是产生了一些地球物理效应，无疑影响了振荡的性质。
The paper deals with preliminary results of a frequency-time analysis of geomagnetic micropulsations in the frequency range 0.5–5 cps. The data from which these results derive were recorded near Palo Alto, California, November 18–21, 1960. At times, oscillatory signals of slowly varying frequency were observed continuously for periods of many hours. Signals of more rapidly varying frequency were also observed, but for shorter periods of time, usually 10 to 30 minutes. Oscillations at the same frequencies were found to occur simultaneously on waveform records obtained at California Institute of Technology stations near Ely, Nevada, and near Isabella and Mount Palomar, California. The oscillations are called hydromagnetic (hm) emissions, since preliminary evidence implies that they are generated either above or high in the ionosphere and are propagated downward by hydromagnetic waves. The period preceding and including the interval during which data were obtained was characterized by solar-flare activity that produced a number of geophysical effects and undoubtedly influenced the nature of the oscillations.