Ultra low frequency waves in the magnetosphere

@article{Dungey1970UltraLF,
  title={Ultra low frequency waves in the magnetosphere},
  author={James W. Dungey and David J. Southwood},
  journal={Space Science Reviews},
  year={1970},
  volume={10},
  pages={672-688}
}
The behaviour of continuous pulsations pc 2–5 observed on the ground has been known for some time. They seldom occur at night, their amplitudes generally increase towards the auroral zones and the sense of rotation of their polarisation often agrees with surface waves on the magnetopause. Recently ULF sonagrams for middle latitudes have shown systematic behaviour and dominant periods. Theoretical study of normal modes for symmetrical models is also well established. If the wave depends on… 

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References

SHOWING 1-10 OF 24 REFERENCES

Standing Alfvén waves in the magnetosphere

Transverse, low-frequency oscillations in the magnetic field have been recorded in the equatorial plane at 6.6 RE (earth radii) with the UCLA magnetometer on board ATS 1. The oscillations have

Hydromagnetic disturbances of 3‐ to 15‐minute period on the magnetopause and their relation to bow shock spikes

Data from IMP 2 magnetopause crossings are analyzed to reveal the character of the motion of the magnetospheric boundary. This boundary is found to be almost always in motion. The spatial amplitudes

OBSERVATIONS OF LOW-FREQUENCY HYDROMAGNETIC WAVES IN THE DISTANT GEOMAGNETIC FIELD: EXPLORER 6

Certain of the measurements obtained simultaneously with three of the instruments aboard the earth satellite Explorer 6 are discussed. The results from these instruments, the magnetometer, aspect

Structure of the magnetopause at 6.6 R sub E in terms of 50- to 150-kev electrons.

Measurements were made with a magnetic deflection electron spectrometer of electrons in the range 50–150 kev at the boundary of the magnetosphere on January 14, 1967. At this time, the magnetopause

Magnetic fields in the magnetopause and vicinity at synchronous altitude

At 0007 UT on January 14, 1967, the magnetopause was detected at 6.6 RE with the synchronous equatorial satellite ATS 1. Several boundary crossings were recorded during the succeeding hour as the

Magnetic field measurements with the IMP 2 satellite

The IMP 2 satellite was launched on October 4, 1964, with apogee at 15.9 RE near the earth-sun line. Two onboard monoaxial fluxgate magnetometers measured magnetic fields in interplanetary space, the

OSCILLATION OF THE GEOMAGNETIC FIELD LINES AND ASSOCIATED MAGNETIC PERTURBATIONS AT CONJUGATE POINTS

By means of an idealized elastic string model, the symmetry relations in the magnetic perturbation at a pair of conjugate points due to oscillation of the lines of force of the geomagnetic field are

General Characteristics of pc-type Pulsations

An analysis of geomagnetic micropulsations of the pc type, i.e. continuous pulsations detectable for several hours at a time, recorded at Brisbane (35°S. geomagnetic latitude) from May to October