Physics
Scientific paper
Sep 1962
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1962jatp...24..785a&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 24, no. 9, pp. 785-796
Physics
5
Scientific paper
Drastic changes occurred in the distribution of the arctic aurora during the great magnetic storm of 11 February 1958. They are here described, on the basis of the records of the auroral all-sky cameras in North America, together with one in East Siberia and the one in Japan. Over the dark hemisphere the aurora occurred overhead in a strip of varying width that lay parallel to the auroral zone. Its northern border fluctuated considerably during the storm, in parallel with the occurrence of polar magnetic sub-storms (DP) during the main storm. In the quiet intervening intervals, the northern border of the strip of aurora descended to geomagnetic latitude 50°N. During these quiet intervals, the aurora was completely absent from the region of the auroral zone, where normally it is most frequent and intense. During the DP's the strip was widest, and expanded mainly by northward movement of its northern border. The southern border moved slightly southward at the same time, but its latitude was nearly constant throughout the main Dst phase of the storm. An explanation is suggested in terms of the varying distribution of particles in the region of the Van Allen belts.
Akasofu Syuh-Ichi
Chapman Sandra
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