Two spacecraft Measurements of the Dusk Magnetotail Boundary Under Northward IMF Conditions: January 10--11, 1997

Details Two spacecraft Measurements of the Dusk Magnetotail Boundary Under Northward IMF Conditions: January 10--11, 1997 Two spacecraft Measurements of the Dusk Magnetotail Boundary Under Northward IMF Conditions: January 10--11, 1997

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm22a..07f&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SM22A-07

Other

2724 Magnetopause, Cusp, And Boundary Layers, 2744 Magnetotail, 2748 Magnetotail Boundary Layers, 2752 Mhd Waves And Instabilities, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Late in the January 10-11 1997 magnetic storm interval, large solar wind density changes moved the dusk magnetotail boundary in and out over the Geotail and Interball spacecraft. These spacecraft were positioned between X=-5 and -15 Re and within a few Re of one another. The IMF was quite steady and mostly very northward during this interval, replicating conditions favorable to Kelvin Helmholtz instability in the equatorial region. Farrugia et al. (JGR 105, 7639, 2000) have studied the latter part of this interval, focusing on the Interball data and concluding that the boundary is indeed KH unstable. Here we extend this work by focusing more on the Geotail data earlier in the interval while Interball was several Re tailward and earthward. This configuration allows study of periodic boundary crossings at Geotail while Interball monitored the more earthward boundary layer. A magnetopause boundary model is shown to be quite accurate and its use helps determine density and velocity gradients normal to the boundary. Such quantities are important in determining the effectiveness of the KH instability in transporting magnetosheath particles into the magnetosphere.

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