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Motion and structure of the magnetopause

1971; American Geophysical Union; Volume: 76; Issue: 7 Linguagem: Inglês

10.1029/ja076i007p01673

2156-2202

M. P. Aubry, M. G. Kivelson, C. T. Russell,

Geomagnetism and Paleomagnetism Studies

Journal of Geophysical Research (1896-1977)Volume 76, Issue 7 p. 1673-1696 Motion and structure of the magnetopause Michel P. Aubry, Michel P. AubrySearch for more papers by this authorMargaret G. Kivelson, Margaret G. KivelsonSearch for more papers by this authorChristopher T. Russell, Christopher T. RussellSearch for more papers by this author Michel P. Aubry, Michel P. AubrySearch for more papers by this authorMargaret G. Kivelson, Margaret G. KivelsonSearch for more papers by this authorChristopher T. Russell, Christopher T. RussellSearch for more papers by this author First published: 1 March 1971 https://doi.org/10.1029/JA076i007p01673Citations: 157AboutPDF 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 onFacebookTwitterLinked InRedditWechat Abstract Data obtained during a 2-hour sequence of multiple crossings of the magnetopause in the equatorial plane near 0900 LT with the Ogo 5 UCLA triaxial fluxgate magnetometer and electron spectrometer show that the magnetopause motion was composed of two different oscillations: large-amplitude oscillations with periods from 3.5 to 6 min. and smaller amplitude oscillations with periods as short as 10 sec. The amplitude of the short-period oscillation increased abruptly when the magnetosheath field turned 90° southward, producing an extremely variable boundary. The particle boundary showed the same oscillations as the magnetic field boundary, but the two were not coincident and their relative position was quite variable. The direction of the normal to the magnetopause during successive crossings shows that these oscillations do not represent pulsation of the whole boundary but are ripples moving tailward with a velocity of the same order as the plasma flow velocity. The observed structure of the boundary was not consistent with a rotational discontinuity. Since the component of the magnetic field normal to the boundary was often nonzero, however, the structure was not consistent with a steady state tangential discontinuity either. Citing Literature Volume76, Issue7Space Physics1 March 1971Pages 1673-1696 RelatedInformation