Solar wind control of the magnetopause shape, location, and motion

Details Solar wind control of the magnetopause shape, location, and motion Solar wind control of the magnetopause shape, location, and motion

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.5489s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, April 1, 1991, p. 5489-5495. NASA-supported research.

Physics

259

Magnetic Field Configurations, Magnetopause, Plasma Pressure, Solar Terrestrial Interactions, Solar Wind, Birkeland Currents, Dynamic Pressure, Interplanetary Magnetic Fields

Scientific paper

A data set of 1821 magnetopause crossings was assembled. Separate fits to subsets of this data set determine the magnetopause location as a function of solar wind dynamic pressure and interplanetary magnetic field orientation. Solar wind dynamic pressure variations produce self-similar magnetopause motion on time scales of one hour or longer. In this paper, the pressure balance relationship between the solar wind dynamic pressure and the location of the subsolar magnetopause are verified. The relationship between the IMF Bz, region 1 Birkeland current strength, the position of the subsolar magnetopause, and the shape of the dayside magnetosphere is quantified. Cross sections of the dayside magnetopause in planes perpendicular to the earth-sun line are oblate.

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