Ultra low frequency waves in the magnetosphere

  title={Ultra low frequency waves in the magnetosphere},
  author={James W. Dungey and David J. Southwood},
  journal={Space Science Reviews},
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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