Abstract
IN recent communications1,2 and an earlier letter3 various workers have shown that electrodynamic drift (that is, magnetohydrodynamic motion of the magnetic field lines) in the F2 layer would give rise to a phenomenon similar to the observed Appleton anomaly. However1,2, the required drift speeds are much smaller than, the 20 m/sec or more predicted by dynamo theory4,5.
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KENDALL, P., WINDLE, D. The Appleton Anomaly. Nature 207, 964–965 (1965). https://doi.org/10.1038/207964a0
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DOI: https://doi.org/10.1038/207964a0
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