Abstract
THEORETICAL reasons exist for believing that the auroral isochasms should be projections of circles in the equatorial plane outside the Earth on to its surface along the geomagnetic lines of force1.
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References
Alfvén, H., “Cosmical Electrodynamics” (Oxford, 1950).
Hultqvist, B., Arkiv för geofysik, 3, 63 (1958).
Vestine, E. H., Terr. Magn., 49, 77 (1944).
Gartlein, C. W., U.S. Visual Observations, News Letter No. 18 (Ithaca, New York, Feb. 23, 1959).
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HULTQVIST, B. Auroral Isochasms. Nature 183, 1478–1479 (1959). https://doi.org/10.1038/1831478a0
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DOI: https://doi.org/10.1038/1831478a0
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