Abstract
W. R. PIGGOTT1 has reported coherent variations with longitude which he interprets as motion of the “storm-D regions” once around the earth in 48 hr. This result is based on the data of about three years from each of six vertical-incidence ionospheric stations. Work at the National Bureau of Standards, however, based on ionospheric data tabulations from seventeen stations for the four years, 1949–52, does not support the hypothesis of coherent motion of such regions.
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References
Piggott, W. R., Nature, 171, 124 (1953).
Watts, J. M., and Brown, J. N., International Scientific Radio Union, Ottawa, October 5–8, 1953 (accepted by J. Geophys. Res. for publication in March 1954).
Agy, V., International Scientific Radio Union, Ottawa, October 5–8, 1953 (accepted by the J. Geophys. Res., for publication in June 1954).
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AGY, V. Motion of the Storm-D Regions. Nature 173, 445–446 (1954). https://doi.org/10.1038/173445b0
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DOI: https://doi.org/10.1038/173445b0
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