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Attention is drawn to the fact that the high-powered radio wave heaters developed for modifying F region ionospheric parameters can have a detectable influence on E region electron densities as well. Anticipated density variations are calculated for typical daytime and nighttime conditions. Furthermore, it is suggested that such variations will perturb the ionospheric dynamo current, thereby leading to a perceptible variation in the associated magnetic field measured on the ground.
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Willis et al. (1973) studied this question.
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