Abstract
EXPERIMENTAL evidence has been obtained over a relatively large geographical area in the western hemisphere confirming the existence of abnormally high F2-layer densities during, or shortly after, geomagnetic disturbances. The observed effect of these high F2-layer densities is to propagate radio frequencies at least 20 per cent above the median maximum usable frequency of the period in question.
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References
Berkner and Seaton, Terr. Mag., 419 (Dec. 1940).
Appleton and Piggott, Nature, 165, 130 (1950).
Gerson, N. C., Nature, 166, 316 (1950).
D-series as issued throughout this period by the Central Radio Propagation Laboratory.
Ferrell, unscheduled report, RASO-2 (March 15, 1949).
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FERRELL, O. Enhanced Trans-Equatorial Propagation following Geomagnetic Storms. Nature 167, 811–812 (1951). https://doi.org/10.1038/167811a0
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DOI: https://doi.org/10.1038/167811a0
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