Title: Coherence of geomagnetic<i>DP</i>2 fluctuations with interplanetary magnetic variations
Abstract: Journal of Geophysical Research (1896-1977)Volume 73, Issue 17 p. 5549-5559 Coherence of geomagnetic DP 2 fluctuations with interplanetary magnetic variations Atsuhiro Nishida, Atsuhiro NishidaSearch for more papers by this author Atsuhiro Nishida, Atsuhiro NishidaSearch for more papers by this author First published: 1 September 1968 https://doi.org/10.1029/JA073i017p05549Citations: 372AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract From the comparison of the worldwide geomagnetic data with IMP 1 magnetic records obtained in the interplanetary space, it is found that the DP 2 fluctuations, which are thought to be the geomagnetic counterpart of intensity fluctuations of the magnetospheric convective system, are coherent with variations in the north-south component of the interplanetary magnetic field. This coherence is observed irrespective of whether this component is directed northward or southward. Average time delay between the crossing of an interplantary magnetic structure across the nose of the bow shock and the associated magnetic variation on the ground is 7 minutes at the pole and 9 minutes at the midday equator. Applicability of the proposed models of the magnetospheric electric field to this phenomenon is critically examined, and the penetration of the interplanetary electric field into the magnetosphere is suggested as the origin of the DP 2 phenomenon. References Alfvén, H., Hydromagnetics of the magnetosphere, Space Sci. Rev., 2, 862, 1963. Argo, H. V., J. R. Asbridge, S. J. Bame, A. J. Hundhausen, I. B. Strong, Observations of solar wind plasma changes across the bow shock, J. Geophys. Res., 72, 1989, 1967. Atkinson, G., A theory of polar substorms, J. Geophys. Res., 71, 5157, 1966. Atkinson, G., Polar magnetic substorms, J. Geophys. Res., 72, 1491, 1967. Axford, W. I., Viscous interaction between the solar wind and the earth's magnetosphere, Planetary Space Sci., 12, 45, 1964. Axford, W. I., The interaction between the solar wind and the magnetosphere, Aurora and Airglow B. M. McCormac, 499, Reinhold Publishing Company, New York, 1967a. Axford, W. 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Publication Year: 1968
Publication Date: 1968-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 448
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