Recent studies in micropulsation theory

@article{Southwood1974RecentSI,
  title={Recent studies in micropulsation theory},
  author={David J. Southwood},
  journal={Space Science Reviews},
  year={1974},
  volume={16},
  pages={413-425}
}
  • D. Southwood
  • Published 1 September 1974
  • Physics
  • Space Science Reviews
Three recent studies in the theory of micropulsations are described. Attention is given to the behaviour of the signal below the magnetosphere in the ionosphere and atmosphere, to the field line resonance problem and to hot plasma effects on magnetospheric hydromagnetic waves. In each case recent relevant observations are discussed. 
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37 Citations
Background Citations
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37 Citations

Diagnostics of the plasma in the magnetosphere by means of measurement of the spectrum of Alfvén oscillations

Comments on Field Line Resonances and Micropulsations

Summary Features and limitations of a simple plasma model exhibiting hydro-magnetic transverse mode field line resonances are discussed in relation to geomagnetic micropulsations.

Localised compressional hydromagnetic waves in the magnetospheric ring current

Dispersion relation for magnetosonic waves within the upper atmospheric plasma

The dispersion relation for magnetosonic waves within the upper atmospheric plasma has been derived. The result can be used to study the variation of the longitudinal and transverse component of…

Research in magnetospheric wave phenomena

During the last 4 years a number of developments have occurred which have led to an increased understanding of the role of wave phenomena in the physical processes of the magnetosphere. While the…

Propagation properties of hydromagnetic waves in a hot plasma and right-hand polarized PC1 and PC5

Problems of the physics of geoelectromagnetic waves (a review)

Relevant tasks, disputable issues, and unsettled problems of the physics of ultralow-frequency electromagnetic waves of natural origin (a period range of 0.2–600 s) are discussed in the paper. Waves…

Range finding of Alfvén oscillations and direction finding of ion-cyclotron waves by using the ground-based ULF finder

A new approach to the problem of direction and distance finding of magnetospheric ULF oscillations is described. It is based on additional information about the structure of geoelectromagnetic field…

Propagation characteristics of hydromagnetic waves in a cold plasma mixed with a hot plasma and right-hand polarized Pc1 and Pc5

Hydromagnetic wave observations at large longitudinal separations

Global enhancements and depressions in ULF magnetic activity in the approx.20- to 60-mHz frequency range (magnetic pulsations) at longitudes separated by approx.5 hours in local time (geomagnetic…

References

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THE large-scale structure of low frequency hydromagnetic waves in the magnetospheric plasma can be understood from observations of micropulsations at the Earth's surface. Signals have to penetrate…

The behaviour of ulf waves and particles in the magnetosphere

The Effect of Two Periodic Conductivity Anomalies on Geomagnetic Micropulsation Measurements

Summary The effect of induced magnetic fields on the Earth based measurement of micropulsations is examined by means of two simple two-dimensional models, one with six and the other four variable…

Some features of field line resonances in the magnetosphere

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A theory of long-period (Pc 3 to Pc 5) magnetic pulsations is presented based on the idea of a steady state oscillation of a resonant local field line that is excited by a monochromatic surface wave…

Latitude‐dependent characteristics of long‐period geomagnetic micropulsations

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