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Experiment results are presented which show that electrostatic cyclotron harmonic (Bernstein) waves generated by supra‐thermal electrons can decay parametrically into whistler mode waves with very high efficiency. The spectral intensity of the whistler mode waves so produced has a maximum at twice the lower hybrid frequency. It is proposed that this is the dominant process responsible for the generation of VLF hiss and the so‐called VLF saucers.
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R. W. Boswell (1976) studied this question.
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