Abstract
GEOMAGNETIC fluctuations of two different types in the frequency-range 0.1–30 c./s. have recently been reported by Duffus et al. 1. Fig. 2 of their communication shows that one of these types closely resembles two other naturally occurring oscillations, and has a period (about 6 sec.) of the same order as the latter. These two naturally occurring (and probably associated) oscillations are microseisms and microbaroms, and one or the other of them may be the cause of the observed magnetic oscillations.
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References
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DANIELS, F. Possible Causes of Geomagnetic Fluctuations having a Six-Second Period. Nature 182, 1439 (1958). https://doi.org/10.1038/1821439a0
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DOI: https://doi.org/10.1038/1821439a0
