Abstract
The anisotropic radiation of infrasonic waves from moving aurorae is explained by a shock wave model. The acoustic waves, as observed on the ground at a site ahead of the moving aurora, are amplified in the direction parallel to the auroral motion by superposition of wave fronts if the auroral form is moving at supersonic speed.
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WILSON, C. Infrasonic Pressure Waves from the Aurora: a Shock Wave Model. Nature 216, 131–133 (1967). https://doi.org/10.1038/216131a0
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DOI: https://doi.org/10.1038/216131a0
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